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Matthew M.

Matthew M.

Your First PHP Script

Slide Duration:

Table of Contents

Course Introduction

12m 13s

Intro
0:00
What Is PHP?
0:12
PHP Hypertext Preprocessor
0:13
Why Learn PHP?
1:09
Why Learn PHP?
1:10
Web Application: Educator Store
2:25
Web Application: Educator Store
2:26
Example of Web Application
3:18
PHP in the Educator Store
7:12
Dynamic Content Generation
7:22
Ease of Website Maintenance
7:55
Form Input Processing and Access to Advanced Functionality
9:00
What You Will Learn
9:36
What You Will Learn
9:37
Who Is This Course For?
10:56
Who Is This Course For?
10:57
How PHP & The Web Work

15m 32s

Intro
0:00
Lesson Overview
0:10
Lesson Overview
0:11
Client-Server Model
0:53
Client-Server Model
0:54
HTTP Protocol
2:15
Definition of Protocol
2:16
Hypertext Transfer Protocol (HTTP)
2:37
Uniform Resource Locators
3:46
Uniform Resource Locators (URLs)
3:47
Form of URLs
4:13
Accessing Webpages with URLs
5:13
Serving Webpages
6:14
Serving Webpages, Client Machine, and Server Machine
6:15
Static vs. Dynamic Webpages
8:30
Static Webpage
8:31
Dynamic Webpage
8:55
Server-Side Scripting
9:54
Server-Side Scripting
9:55
Static and Dynamic Webpage Coding Example
11:17
Static and Dynamic Webpage Coding Example
11:18
Serving Dynamic Webpages
13:07
Serving Dynamic Webpages
13:08
Setting Up Your Development Environment

33m 11s

Intro
0:00
Lesson Overview
0:08
Lesson Overview
0:09
Development Environments
1:04
Development Environments
1:05
Our Default Development Environment: Window 7
1:54
Remote Development
4:04
Development Machine & Remote Server
4:05
Local Development
6:54
Development Machine
6:55
Software Used In This Course
9:41
Firefox Web Browser & Firebug Add-On
9:42
XAMPP
12:15
PSPAD Text Editor
13:16
XAMPP Installation
13:49
XAMPP Installation
13:50
Verify XAMPP Install
16:26
Verify XAMPP Install
16:27
localhost
19:08
localhost and 127.0.0.1 'loopback' IP Address
19:09
Document Root
21:16
Document Root and Directory Name
21:17
Document Root for Apache in XAMPP: htdocs & Example
22:13
Text Editor Spectrum
26:12
Text Editor Spectrum: Barebones to IDE
26:13
PSPad & Example
27:02
Finding Help
30:26
Web Resources
30:27
Homework Challenge
31:36
Homework Challenge
31:37
Homework Challenge (cont.)
32:38
Homework Challenge (cont.)
32:39
Your First PHP Script

12m 41s

Intro
0:00
Lesson Overview
0:19
Lesson Overview
0:20
.php To HTML
1:00
.php To HTML
1:01
PHP Delimiters
2:20
PHP Delimiters: Opening & Closing PHP Tags
2:21
'Hello, World!' Example
4:34
Echo Statement & PHP Tags
4:35
Adding Second Heading
7:34
Homework Challenge
9:56
Homework Challenge
9:57
Basic PHP Syntax

40m 24s

Intro
0:00
Lesson Overview
0:09
Lesson Overview
0:10
PHP Delimiters
0:38
Long and Script Form
0:39
Short and ASP Style
1:33
Example
2:01
php.ini: PHP's Configuration
3:40
php.ini
3:41
Configuration Directives
3:48
Short and ASP Style: Enabled/Disabled
4:13
phpinfo()
7:58
Statements
14:28
PHP Statements
14:29
Example: PHP Statements
14:55
Comments
16:53
PHP Comments
16:55
Single-line Comments
17:37
Multi-line Comments
18:13
Example: PHP Comments
18:47
Coding Conventions
24:26
Coding Conventions
24:27
Example: PHP Coding Conventions
26:19
Homework Challenge #1
33:51
Homework Challenge #1
33:52
Homework Challenge #1 (cont.)
35:41
Homework Challenge #1 (cont.)
35:42
Homework Challenge #2
36:09
Homework Challenge #2
36:10
Homework Challenge #2 (cont.)
38:07
Homework Challenge #2 (cont.)
38:08
Variables & Numeric Data Types

16m 38s

Intro
0:00
Lesson Overview
0:10
Lesson Overview
0:12
Working With Data
0:48
8 Types of Data for PHP
0:49
Identifiers
1:40
Identifiers: Definition and Example
1:41
Variables
2:47
Variables Definition
2:48
Variables Syntax
3:06
Integer Data Type
4:44
Integer Data Type
4:45
Integer Literals
5:08
Examples
5:30
Float Data Type
6:26
Float Data Type
6:27
Float Literals
7:00
Example
7:21
Example: PHP Code Declaring Variables
8:06
Example: PHP Code Declaring Variables
8:07
var_dump() Function
9:59
var_dump()
10:00
Example: Code and Output
10:30
Example: var_dump() Function
11:19
Coding Conventions: Variables
12:32
Lower Camel Case Notation
12:33
Variable Name Lengths
13:54
Homework Challenge
14:54
Homework Challenge
14:55
String Data Type

18m 6s

Intro
0:00
Lesson Overview
0:12
Lesson Overview
0:13
String Data Type
0:29
String Data Type
0:30
Specifying String Literals
1:03
Single-Quoted Strings
1:53
Single-Quoted Strings
1:54
Escape Sequences
2:31
Escape Sequences
2:32
Example
2:46
Escape Sequences for Commonly Used Special Characters
4:32
Double-Quoted Strings
6:04
Double-Quoted Strings
6:05
Variable Interpolation
6:44
Coding Conventions: Strings
7:54
Coding Conventions: Strings
7:55
Homework Challenge
8:54
Homework Challenge
8:55
Include Files & Web Application Introduction

38m 43s

Intro
0:00
Lesson Overview
0:16
Lesson Overview
0:17
include Statement
0:47
include Statement: Definition
0:48
Include Statement: Syntax
2:05
include Statement: Example
2:25
include Path
6:32
Absolute and Relative Path
6:34
Specified Path
7:15
Not Specified Path
7:55
Code Reuse
9:35
Code Reuse
9:36
Example
11:11
require Statement
12:56
require Statement: Definition
12:57
require Statement: Syntax
13:32
Include versus Require
13:52
Coding Conventions
16:33
Coding Conventions
16:34
Introduction to Our Web Application
20:32
Introduction to Our Web Application
20:33
Updating Web Application
21:14
Web Application Example
22:59
Homework Challenge
35:33
Homework Challenge
35:34
Homework Challenge (cont.)
37:38
Homework Challenge (cont.)
37:39
Arrays

34m

Intro
0:00
Lesson Overview
0:09
Lesson Overview
0:10
What is an Array?
0:42
What is an Array?
0:43
Arrays in PHP
1:44
Keys and Values
2:15
Types of Arrays
3:37
Indexed Arrays & Associative Arrays
3:38
array() Construct
6:47
Declaring Arrays
6:48
Defining Indexed Array
7:00
Defining Associative Arrays
7:43
Square Bracket Syntax
8:50
Square Bracket Syntax
8:51
Accessing Indexed Arrays
9:02
Accessing Associative Arrays
9:56
Arrays Example
10:41
Indexed Arrays Example
10:45
Associative Arrays Example
13:55
Multi-Dimensional Arrays
18:28
Multi-Dimensional Arrays
18:29
Multi-Dimensional Arrays Example
18:51
Multi-Dimensional Arrays in PHP File
20:34
Coding Conventions: Arrays
27:59
Coding Conventions: Arrays
28:00
Homework Challenge #1
29:20
Homework Challenge #1
29:21
Homework Challenge #2
30:38
Homework Challenge #2
30:39
Web Application Development

27m 38s

Intro
0:00
Versions
0:14
Version 3.0
1:23
Version 3.1
8:08
Version 3.2
11:42
Version 3.3
20:27
Homework Challenge
26:31
Homework Challenge
26:32
Script Input & The GET Method

30m 18s

Intro
0:00
Lesson Overview
0:15
Lesson Overview
0:16
Providing Input to PHP
0:39
GET Method, POST Method, and Cookies
0:40
Name/Value Pairs
1:22
GET Method
1:57
HTTP GET Method
1:58
Query String
2:52
GET Method Example
3:38
GET Method Example
3:39
Review of HTML Forms
8:16
HTML Forms
8:17
Input Control and Submitted Form
9:13
<form> Tag
10:07
<form> Tag
10:08
Method
10:34
Action
11:13
Input Control Examples
11:50
Input Control Examples
11:51
Common Input Controls
17:31
Common Input Controls
17:32
Query Strings
18:52
Query Strings
18:53
Query Strings Syntax
19:12
URL Encoding
20:01
URL Syntax
20:02
Examples
21:17
Simple Form Example
22:28
urlencode() Function
24:08
urlencode() Function
24:09
Example
25:03
urlEncoding Text Example
25:54
Simple Form Example
25:55
Homework Challenge
28:46
Homework Challenge
28:47
Accessing Form Data in PHP

32m 1s

Intro
0:00
Lesson Overview
0:17
Lesson Overview
0:18
$_GET Array
0:48
$_GET Array
0:49
Accessing the Value of a Name/Value Pair Submitted Via GET
1:04
Name Form Example
2:54
Name Form and the $_GET Array
2:55
Using Arrays with Input Controls
6:34
Using Arrays with Input Controls
6:35
Common Example
6:47
Indexed Array Form Example
8:16
Indexed Array Form Example
8:17
Associative Arrays with Input Controls
10:14
Associative Arrays with Input Controls
10:15
Associative Arrays Example
11:41
Associative Arrays Example
11:42
Echo Form Example
15:18
Echo Form Example
15:19
Outputting Arrays In String
23:42
Variable Interpolation
23:43
Outputting a Value in an Indexed Array Within a String
24:12
Simple' Syntax, 'Complex' Syntax, and 'Curly Brace' Syntax
25:00
Outputting Arrays In String Example
26:25
Outputting Arrays In String Example
26:26
Homework Challenge
29:39
Homework Challenge
29:40
Web Application Development

20m 20s

Intro
0:00
Lesson Overview
0:19
Lesson Overview
0:20
Version 3.3
0:38
Version 3.3
0:42
Version 4.0 Changelog
2:43
GET Query
2:45
Adding, Editing, and Removing
3:24
Version 4.0 Coding Example
3:55
item.php, itemID, and itemListing
4:00
Version 4.1 Changelog
10:36
Version 4.1 Changelog
10:37
Version 4.1 Coding Example
11:45
Adding Checkout and Thank You & Editing Footer and Store
11:46
Homework Challenge
18:45
Homework Challenge
18:46
Expression & Operators

31m 56s

Intro
0:00
Lesson Overview
0:10
Lesson Overview
0:11
Expressions
0:41
Expressions Definition
0:42
Example: Literals
0:55
Example: Variables
1:05
Operators
1:44
Operators Definition
1:45
Unary, Binary, and Ternary Operators
2:07
Assignment Operators
2:52
Assignment Operators
2:53
Array Assignment Operator
3:47
Arithmetic Operators
6:15
Operators for Common Arithmetic Operations
6:16
Modulus Operator
7:41
Arithmetic Operators Example
8:25
Increment/Decrement Operators
10:48
Increment/Decrement Operators
10:49
Pre- and Post- Increment/Decrement
12:43
Coding Example
15:14
Combined Assignment Operators
16:44
Combined Assignment Operators
16:45
Combined Assignment Operators Examples
18:23
Coding Example
19:39
String Operators
20:28
Concatenation Operator, String Variables, and String Literals
20:29
String Operators Example
22:41
Precedence & Associativity
23:40
Precedence & Associativity
23:41
Expression Containing Multiple Operations
23:58
Expression Containing Two Operations of Equal Precedence
25:55
Using Parentheses to Force Precedence
26:52
Precedence & Associativity Review
28:57
Homework Challenge
31:08
Homework Challenge
31:09
Web Application Development

20m 51s

Intro
0:00
Lesson Overview
0:15
Lesson Overview
0:16
Version 4.1 Review
0:33
Version 4.1 Review
0:34
Version 5.0 Changelog
1:05
Version 5.0 Changelog
1:06
Version 5.0 Example
2:19
Adding View Cart & Editing Checkout, Footer and Store
2:20
Version 5.1 Changelog
15:36
Version 5.1 Changelog
15:37
Version 5.1 Coding Example
17:33
Forwarding Order Total to Thank You Page
17:34
Homework Challenge
20:09
Homework Challenge
20:10
Boolean & Null Data Types

20m 11s

Intro
0:00
Lesson Overview
0:12
Lesson Overview
0:13
Boolean Data Type
0:38
Boolean Data Type
0:39
Two Boolean Literals
1:24
Boolean Example
1:50
Boolean Example
1:51
Comparison Operators
4:00
Comparison Operators Definition
4:01
Common Comparison Operators
4:40
Comparison Operators Example
6:49
Comparison Operators (Cont.)
10:10
Identical and Not Identical
10:11
Example: Identical and Not Identical
11:24
Null Data Type
13:36
Null Data Type Definition
13:37
Null Literal
14:08
Variable and Null Data Type
14:30
'==' Operator
15:24
Null Data Type Example
15:59
Coding Convention
18:41
Coding Convention
18:42
Homework Challenge
19:17
Homework Challenge
19:18
Type Casting

22m 41s

Intro
0:00
Lesson Overview
0:12
Lesson Overview
0:13
Type Juggling
0:54
Type Juggling
0:55
Automatic Conversion
2:23
Type Casting
3:53
Type Casting
3:54
Implicit and Explicit Type Casting
4:00
Explicitly 'cast' a Variable Example
4:16
Type Casting (cont.)
6:48
PHP Allows the Following Explicit Type Casts
6:49
The settype () Function
8:18
Type Casting Coding Example
9:00
Explicit Type Casts
9:01
String Conversions
14:52
String Conversions
15:05
Common Conversions to String
15:55
Numeric Conversions
18:18
Numeric Conversions
18:19
Boolean Conversions
20:29
Boolean Conversions
20:30
Homework Challenge
21:38
Homework Challenge
21:39
Introduction to Functions

52m 20s

Intro
0:00
Lesson Overview
0:10
Lesson Overview
0:11
What are Functions?
0:51
Definition of Faction
0:52
PHP and Function Call
1:53
Function Calls
2:42
Function Calls
2:43
Function Arguments
3:17
Return Values
4:56
Return Values
4:57
Function Chaining
6:29
Function Chaining
6:30
PHP.net Function Reference
8:23
PHP.net & Function Prototypes
8:24
PHP.net Function Reference Example
9:29
Optional Function Arguments
12:28
Optional Function Arguments
12:29
String Functions
14:57
strtoupper() and strtolower()
14:58
implode (), str_replace(), explode(), strpos(), substr(), and strlen()
18:31
Array Functions
25:48
count()
25:49
in_array() and array_key_exists()
26:06
sort() and ksort()
26:37
Example: count() and in_array()
27:50
Example: array_key_exists()
29:53
Example: sort() and ksort()
31:20
Date & Time Functions
33:38
date() and time()
33:39
getdate()
34:49
mktime()
35:01
Date & Time Functions
35:12
Example: date() and time()
35:58
Example: getdate()
42:15
Example: mktime()
43:15
Homework Challenge #1
44:31
Homework Challenge #1
44:32
Homework Challenge #1 (Cont.)
45:28
Homework Challenge #1 (Cont.)
45:29
Homework Challenge #2
46:34
Homework Challenge #2
46:34
Homework Challenge #2 (Cont.)
48:06
Homework Challenge #2 (Cont.)
48:07
Homework Challenge #2 (Cont.)
49:17
Homework Challenge #2 (Cont.)
49:18
Homework Challenge #3
50:08
Homework Challenge #3
50:09
Constants

19m 24s

Intro
0:00
Lesson Overview
0:09
Lesson Overview
0:10
Constants vs. Variables
0:55
Constants vs. Variables
0:56
Constant Identifiers
2:28
Constant Identifiers Definition and Examples
2:29
Declaring Constants
3:47
Two Ways of Declaring Constants
3:48
Syntaxes
4:10
Major Difference in the Two Forms
4:48
Using Constants Example
6:25
Using Constants Example
6:26
Coding Conventions
11:08
Constant Names
11:09
define () Function
11:42
Meaningful Names
12:00
$_SERVER Superglobal
12:23
$_SERVER
12:24
$_SERVER ['DOCUMENT_ROOT']
13:15
$_SERVER Superglobal Example
13:52
Homework Challenge
17:40
Homework Challenge
17:41
Web Application Development

26m 29s

Intro
0:00
Lesson Overview
0:13
Lesson Overview
0:14
Version 6.0
1:13
Version 6.0 & Version 5.1 Review
1:14
Version 6.0 Changelog
11:24
Version 6.0 Changelog
11:25
Version 6.1 Changelog
12:00
Version 6.1 Changelog
12:01
Version 6.1 Coding Example
12:42
Version 6.1 Coding Example
12:43
Version 6.2 Changelog
15:18
Version 6.2 Changelog
15:19
Version 6.2 Coding Example
18:19
Version 6.2 Coding Example
18:20
Homework Challenge
25:24
Homework Challenge
25:25
Conditional Control Structures

18m 58s

Intro
0:00
Lesson Overview
0:26
Lesson Overview
0:27
Statement Groups
0:57
Statement Groups
0:58
Example
1:10
Conditional Control Structures
1:38
Conditional Control Structures
1:39
PHP Control Structures
1:56
if Statement
2:32
if Statement
2:33
if Statement (cont.)
3:49
if Statement Coding Example
3:50
else Statement
7:26
else Statement
7:27
if/else Statement Coding Example
8:50
isset() Construct
9:59
isset() Construct
10:00
isset() Construct Coding Example
12:00
Coding Conventions
15:13
Coding Conventions
15:14
Coding Conventions (Cont.)
16:39
Coding Conventions (Cont.)
16:40
Homework Challenge
17:25
Homework Challenge
17:26
Error Handling

19m 8s

Intro
0:00
Lesson Overview
0:09
Lesson Overview
0:10
Error Handling in PHP
0:41
Error Handling in PHP
0:42
Coding Example
1:45
error_reporting() Function
7:02
error_reporting() Function
7:03
Coding Example
8:04
Additional Error Directives
9:02
display_errors
9:13
log_errors
9:37
error_log
9:50
track_errors
10:12
Coding Examples
10:29
Error Control Operator
13:38
Error Control Operator & Coding Example
13:39
Homework Challenge
16:19
Homework Challenge
16:20
Homework Challenge (cont.)
17:58
Homework Challenge (cont.)
17:59
Logical & Ternary Operators

23m 22s

Intro
0:00
Lesson Overview
0:17
Lesson Overview
0:18
Logical Operators
0:49
Logical Operators Definition
0:50
NOT (!)
1:08
OR ( ||, or)
1:35
AND (&&, and)
2:08
XOR (xor)
2:30
Logical Operators (cont.)
2:54
The OR and AND Logical Operators
2:55
Precedence of Logical Operators
3:35
Logical Operators Coding Example
3:58
Logical Operators Coding Example
3:59
Short-Circuit Operators
9:54
Short-Circuit Operators
9:55
Coding Example
10:49
Ternary Operator
14:07
Ternary Operator
14:08
Syntax and Example
14:24
Coding Conventions
17:36
Coding Conventions
17:37
Homework Challenge
19:08
Homework Challenge
19:09
Homework Challenge (cont.)
20:26
Homework Challenge (cont.)
20:27
Web Application Development

19m 27s

Intro
0:00
Lesson Overview
0:12
Lesson Overview
0:13
Version 6.2 Review
0:26
Version 6.2 Review
0:27
Version 7.0 Changelog
2:39
Version 7.0 Changelog
2:40
Version 7.0 Coding Example
4:35
Version 7.0 Coding Example
4:36
Version 7.1 Changelog
12:43
Version 7.1 Changelog
12:44
Version 7.1 Coding Example
13:52
Version 7.1 Coding Example
13:53
Homework Challenge
17:42
Homework Challenge
17:43
More Conditional Control Structure

20m 49s

Intro
0:00
Lesson Overview
0:13
Lesson Overview
0:14
elseif Statement
0:45
elseif Statement
0:46
elseif Statement Coding Example
1:22
Multiple elseif Statements
2:16
Multiple elseif Statements
2:17
Multiple elseif Statements Coding Example
3:07
Adding an else Statement
5:44
Adding an else Statement Overview
5:45
Adding an else Statement Coding Example
6:50
switch() Statement
8:07
switch() Statement
8:08
switch() Statement (Cont.)
9:14
switch() Statement (Cont.)
9:15
switch() Statement Coding Example
11:09
default Case
14:20
default Case
14:21
default Case Coding Example
15:13
Coding Conventions
15:57
Coding Conventions
15:58
Coding Conventions (cont.)
17:10
Coding Conventions (cont.)
17:11
Homework Challenge
18:06
Homework Challenge
18:07
Homework Challenge (cont.)
19:18
Homework Challenge (cont.)
19:19
Nested Conditional Control Structures

24m 49s

Intro
0:00
Lesson Overview
0:10
Lesson Overview
0:11
Nested Control Structures
0:36
Nested Control Structures
0:37
Nested Control Structures Coding Example
2:08
Coding Conventions
6:34
Nested vs. Not Nested Control Structures
6:35
Debugging Control Structures
7:51
Debugging Control Structures
7:52
Incorrectly Specified Test Conditions and Forgetting a Break Statement
8:32
Incorrectly Placing an Opening or Closing Curly Brace
12:14
Debugging Tips
16:24
Tracing the Execution of Your Code
16:25
Adding Echo Statement
17:15
Homework Challenge
21:41
Homework Challenge
21:42
Homework Challenge (cont.)
23:08
Homework Challenge (cont.)
23:09
Web Application Development

28m 20s

Intro
0:00
Lesson Overview
0:13
Lesson Overview
0:14
Version 7.1 Review
0:46
Version 7.1 Review
0:47
empty () Construct
1:38
empty () Construct
1:39
empty () Construct Coding Example
2:37
Version 8.0
5:32
Version 8.0 Overview
5:33
Version 8.0 Coding Example
7:08
Version 8.0 Coding Example
7:09
Version 8.1
16:13
Version 8.1 Overview
16:14
Version 8.1 Coding Example
19:48
Version 8.1 Coding Example
19:49
Homework Challenge
26:19
Homework Challenge
26:20
Sending Email Using PHP

43m 50s

Intro
0:00
Lesson Overview
0:14
Lesson Overview
0:15
Built-in Mail Extension
1:28
Built-in Mail Extension
1:29
SMTP Overview
2:04
SMTP Overview
2:05
SMTP - Windows
3:08
SMTP - Windows
3:09
SMTP - Linux/UNIX
4:58
SMTP - Linux/UNIX
4:59
Mail Configuration Directives
6:35
Mail Configuration Directives
6:36
Coding Example
7:48
Mail Server Authentication
10:20
Mail Server Authentication
10:21
fake sendmail Program
12:27
fake sendmail for Windows
12:28
Main 'add-on' feature
13:03
Username & Password
13:25
SMTP - XAMPP for Windows
14:07
SMTP - XAMPP for Windows
14:08
Sendmail Example
16:19
Sendmail Example
16:20
mail() Function
18:39
mail() Function
18:40
additional_headers
19:45
'From' Header
20:12
mail() Function Coding Example
21:09
mail() Function Coding Example
21:40
Web Application Development
31:43
Version 9.0 Changelog
31:44
ContactUs.php
32:52
ContactUs.php
32:53
contactInfo
33:45
Version 9.0 Coding Example
34:31
Version 9.0 Coding Example
34:32
Homework Challenge
41:32
Homework Challenge
41:33
User-Defined Functions

56m

Intro
0:00
Lesson Overview
0:16
Lesson Overview
0:17
Defining Functions
1:29
Four Parts of Defining a Function
1:30
Functions Example 1
2:29
Function Parameters
5:29
Function Parameters
5:30
Functions Example 2
8:20
Return Statements
12:53
Return Statements
12:54
Functions Example 3
14:20
Where to Define Functions
20:34
Where to Define Functions
20:35
include_once Construct
22:10
include_once Construct
22:11
include_once Coding Example
23:55
Reasons to Use Functions
27:44
Take Advantage of Code Reuse
27:45
Improve Code Readability
29:56
Use Instead of 'content' Include Files
32:12
Web Application Development
34:42
Version 10.0 Changelog
34:43
Version 10.0 Coding Example
37:55
Version 10.0 Coding Example
37:56
Outputting HTML in Functions
47:04
Outputting HTML in Functions
47:05
Example
49:02
Coding Conventions
53:16
Coding Conventions
53:17
Homework Challenge
54:33
Homework Challenge
54:34
Variable Scope

31m 37s

Intro
0:00
Lesson Overview
0:09
Lesson Overview
0:10
What is Variable Scope?
0:57
Variable Scope
0:58
Global Scope
1:15
Local Function Scope
1:50
Variable Scope Coding Example
2:26
Variable Scope Coding Example
2:27
global Keyword
8:52
global Keyword Overview
8:53
global Keyword Example
9:25
Superglobals
12:34
Superglobals
12:35
Superglobals Example
14:53
Pitfalls of Global Variables
18:34
Pitfalls of Global Variables
18:35
When to Define Variables
22:09
When to Define Variables
22:10
Putting It All Together
22:56
Putting It All Together Example
22:57
Function Scope
28:56
Function Scope
28:57
Homework Challenge
29:41
Homework Challenge
29:42
Homework Challenge (cont.)
30:59
Homework Challenge (cont.)
31:00
Web Application Development

28m 27s

Intro
0:00
Lesson Overview
0:12
Lesson Overview
0:13
Version 11.0 Changelog
0:56
Version 11.0 Changelog
0:57
processGetVar()
1:42
processGetVar() Overview
1:43
processGetVar() Example
2:25
emailComments()
6:35
emailComments() Overview
6:36
emailComments() Example
7:14
outputItemLink()
11:19
outputItemLink() Overview
11:20
outputItemLink() Example
11:45
calcCartTotal()
19:25
calcCartTotal() Overview
19:26
calcCartTotal() Example
21:14
Homework Challenge
25:56
Homework Challenge
25:57
Optional Parameters

19m 35s

Intro
0:00
Lesson Overview
0:10
Lesson Overview
0:11
Optional Parameters
0:26
Optional Parameters Definition
0:27
Default Values
0:53
Optional Parameters Coding Example
3:26
More on Optional Parameters
6:55
Multiple Optional Parameters
6:56
Coding Example
8:05
Homework Challenge
16:18
Homework Challenge
16:19
Web Application Development

23m 7s

Intro
0:00
Lesson Overview
0:13
Lesson Overview
0:14
Version 12.0 Changelog
0:55
Version 12.0 Changelog
0:56
Update to outputLink()
1:44
Update to outputLink()
1:45
outputLink() Coding Example
2:40
outputImg()
13:57
outputImg() Overview
13:58
outputImg() Coding Example
15:35
Homework Challenge
22:05
Homework Challenge
22:06
Introduction to Conditional Loops

57m 20s

Intro
0:00
Lesson Overview
0:08
Lesson Overview
0:09
while Loop
0:48
Definition
0:49
Syntax and Usage
1:12
Coding Example
3:33
Looping Over Arrays
13:16
Looping Over Arrays
13:17
Coding Example
13:53
Looping Over Arrays (cont.)
16:43
Internal Array Pointer
16:44
Array Traversal Functions
17:29
current ()
17:30
next () and prev ()
18:16
reset () and end ()
19:25
key ()
19:40
Indexed Arrays: Using current () and next ()
20:40
Indexed Arrays: Using current () and next ()
20:41
Associative Arrays: Using key (), current (), and next ()
24:06
Associative Arrays: Using key (), current (), and next ()
24:07
Array Traversal Functions (cont.)
29:41
list () Construct and Example
30:07
each () Construct and Example
34:40
Lopping Over Arrays Using list(), each()
42:13
Lopping Over Arrays Using list(), each()
42:14
Control Structure Scope
50:37
Definition and Example
50:38
Control Structure Scope Coding Example
51:59
Coding Conventions
54:20
Coding Conventions
54:21
Homework Challenge
54:58
Homework Challenge
54:49
More on Conditional Loops

35m 50s

Intro
0:00
Lesson Overview
0:08
Lesson Overview
0:09
do-while Loop
0:42
do-while Loop
0:43
Simple do-while Loop Example
1:51
Another do-while Loop Example
4:09
continue Statement
10:46
continue Statement
10:47
For Example
11:07
continue Statement Coding Example
12:44
break Statement Re-Visited
18:10
break Statement Re-Visited
18:11
break Statement In while Loops Example
19:38
Infinite Loops
23:26
Infinite Loops
23:27
Coding Example
24:57
Common Loop Pitfalls
25:59
Counter Initialization Occurs in Loop
26:30
Counter Not Incremented in Loop
29:30
Unreachable Break Statement
30:50
Coding Conventions
33:48
Do-while Statements Coding Conventions
33:49
Homework Challenge
34:28
Homework Challenge
34:29
Web Application Development

22m 7s

Intro
0:00
Lesson Overview
0:10
Lesson Overview
0:11
Version 13.0 Changelog
0:48
Updating 'viewCart.php' and calcCartTotal()
0:49
Creating isValidCart()
9:22
Adding Three New Item to the Store & Links
15:56
Version 13.1 Changelog
17:20
Updating outputItemLink() to Remove Its Global Dependency on $itemCatalog
17:21
Homework Challenge
20:34
Homework Challenge
20:35
For & Foreach Loops

29m 28s

Intro
0:00
Lesson Overview
0:11
Lesson Overview
0:12
for Loops
0:45
for Loops
0:46
Expression 1
1:22
Expression 2
1:47
Expression 3
2:01
Simple Example
2:27
Simple Example
2:28
Notes on for Loops
8:56
Notes on for Loops
8:57
Ending Loop Using Test Condition and Break Statement
10:06
Ending Loop Using Test Condition and Break Statement
10:07
foreach Loops
12:03
foreach Loops
12:04
Indexed Array Syntax
14:10
Syntax
14:11
Example
15:23
Associative Array Syntax
18:31
Syntax
18:32
Example
19:47
Coding Conventions
25:05
for Loops
25:06
foreach Loops
25:58
Homework Challenge
26:52
Homework Challenge
26:53
Web Application Development

25m 58s

Intro
0:00
Lesson Overview
0:12
Lesson Overview
0:13
Version 14.0 Changelog
1:19
Version 14.0 Changelog
1:20
Version 14.0 Coding Example
1:57
Version 14.0 Coding Example
1:59
Version 14.1 Changelog
5:39
Version 14.1 Changelog
5:40
Version 14.1 Coding Example
7:06
Version 14.1 Coding Example
7:07
Version 14.2 Changelog
15:37
Version 14.2 Changelog
15:38
Version 14.2 Coding Example
16:25
Version 14.2 Coding Example
16:26
Homework Challenge
23:35
Homework Challenge
23:36
Conditional Loop Wrap-Up

23m 12s

Intro
0:00
Lesson Overview
0:09
Lesson Overview
0:10
Nested Conditional Loops
0:39
Nested Conditional Loops
0:40
Coding Example
1:10
continue & break Re-Visited
5:17
Continue Statements and Coding Example
5:30
Break Statements and Coding Example
11:34
Loop Debugging Tips
15:16
Add Short Debug Statement At the Very Beginning
15:17
Output a Counter Variable
18:10
Add Debug Statement At the Very End
19:20
Homework Challenge
20:20
Homework Challenge
20:21
Homework Challenge (cont.)
22:00
Homework Challenge (cont.)
22:01
Variable-Length Parameter Lists

22m 16s

Intro
0:00
Lesson Overview
0:09
Lesson Overview
0:10
Variable-Length Parameter Lists
0:34
Variable-Length Parameter Lists
0:35
Coding Example
1:51
Variable-Length Parameter Lists (cont.)
5:21
When a Parameter List is Defined For the Functions
5:22
Coding Example
6:32
Variable Type Functions
9:54
is_int (), is_float (), is_string (), and is_bool()
9:55
is_ array ()
10:50
is_null ()
11:01
Variable Type Functions Coding Example 1
11:27
is_numeric() and Example
15:57
Variable Type Functions Coding Example 2
17:12
Homework Challenge
19:35
Homework Challenge
19:36
Homework Challenge (cont.)
20:52
Homework Challenge (cont.)
20:53
Web Application Development

38m 36s

Intro
0:00
Lesson Overview
0:10
Lesson Overview
0:11
Version 15.0 Changelog
0:33
outputLink (), outputImg (), is_array () and is_string ()
0:34
Version 15.0 Coding Example
1:31
Version 15.0 Coding Example
1:32
Version 15.1 Changelog
7:55
Removing Redundant Code and Adding New Function Called outputHtmlTag ()
7:56
Version 15.1 Coding Example
8:37
Version 15.1 Coding Example
8:38
Version 16.0 Changelog
14:55
Creating emailOrder() Using New Constants ORDER_EMAIL_FROM and ORDER_EMAIL_SUBJECT
14:56
Version 16.0 Coding Example
16:30
Version 16.0 Coding Example
16:31
Version 16.1 Changelog
32:21
Creating formatAsDollars ()
32:22
Version 16.1 Coding Example
32:57
Version 16.1 Coding Example
32:58
Homework Challenge
36:27
Homework Challenge
36:28
Miscellaneous Topics

31m 49s

Intro
0:00
Lesson Overview
0:10
Lesson Overview
0:11
register_globals Directive
0:58
register_globals
0:59
Coding Example
2:04
$_GET vs. $HTTP_GET_VARS
4:07
$_GET vs. $HTTP_GET_VARS
4:08
register_long_arrays Directive Coding Example
5:44
Magic Constants
7:30
Magic Constants
7:31
__LINE__, __FILE__, __FIR__, and __FUNCTION__
8:16
Coding Example
9:06
exist() & die()
13:19
exist() & die()
13:20
Coding Example
14:08
Execution Operator
16:23
Execution Operator
16:24
Coding Example
17:27
Array Operators
18:23
Equality (==) and Inequality (!=, <>)
18:43
Identity (===) and Non-Identity (!==)
19:13
Union (+) Operator
19:41
Array Operators Coding Example
20:07
Variable Variables
24:13
Variable Variables
24:14
Coding Example
26:07
Variable Functions
28:02
Variable Functions
28:03
Coding Example
29:13
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Lecture Comments (13)

1 answer

Last reply by: Janet Bargewell
Thu Nov 8, 2012 1:23 PM

Post by Janet Bargewell on November 8, 2012

I am having the same problem as Katherine. I have saved my file as .php and still get the (' ; ?>) at the end of Hello World. Additionally the script is not returning the text as a header even though I am using the <H1> tag.

1 answer

Last reply by: Joe Springer
Tue Oct 23, 2012 4:20 PM

Post by katherine Hernandez on July 30, 2012

Hi: when I test my php file I get all the headings, but on each php output is showing the ('; ?>) ad the end of the heading. Why is that?

1 answer

Last reply by: Mark Deming
Sun Jul 29, 2012 1:46 AM

Post by Mark Deming on July 29, 2012

Rookie status how come when I put this code exactly like you have it in dreamweaver CS5 the code doesn't work. I know the code should work there as well.

0 answers

Post by Jorge Guerrero on March 21, 2012

Sorry, foks, my bad. I was not opening the file INSIDE http://localhost/intro2php/sample.php

That's why code was behaving funny! :)

1 answer

Last reply by: Matthew M.
Wed Apr 11, 2012 4:01 PM

Post by Jorge Guerrero on March 21, 2012

This video dates back to July, 2011. I don't know what's going on, but the only way I could get PHP to work on my computer was like this

<?php echo <h1>Second PHP Block

No further syntax was needed nor recognized by the browser. You guys should check this, as the OP was suggesting the above notation.

Also, you should add a year to the date return of when the comments were posted. If something was posted. It gives one a good sense of how far back the question dates and if it may still be pertinent.

1 answer

Last reply by: Matthew M.
Wed Apr 11, 2012 3:09 PM

Post by Pawel Orzeszak on February 9, 2012

Mathew...
your tutorial is for real idiots... and I'm one of them ! Even and idiot like me can understand everything from your course. Thank you so much ! No problems so far

1 answer

Last reply by: Matthew M.
Tue Feb 7, 2012 3:12 AM

Post by Herve Gnidehoue on December 21, 2011

HELP
I can't get my php file displayed. I followed all the steps to to install Xampp. Here is what I did as you suggested :
I installed Xampp under C:\Users\user1\Xampp.
In the xampp folder, I created a file named MyFirst.php (I mean the first homework)in the folder htdocs. But when I tried to open it, it did not work. The same source code is sent back to me but when I changed the extension to .html, of course my web browser open it but the php tags were trailing around. My concern are where exactly to save the files ? Once Xampp is installed, do I have to configurate any other file ? Does my Apache really communicate with the PHP ? I had confirmation that Apache is working though.

Your First PHP Script

  • For web development, the PHP interpreter usually takes as its input a .php file containing a mixture of HTML and PHP code and generates as its output, HTML.
  • PHP delimiters, or PHP 'opening and closing tags', are used to delineate PHP code within a text file.
  • When using PHP delimiters to separate PHP code from HTML, this is called “escaping from HTML mode” into “PHP mode”.
  • One can escape into and out of both PHP and HTML mode as often as needed within a file.
  • Additional Resources:

Your First PHP Script

Lecture Slides are screen-captured images of important points in the lecture. Students can download and print out these lecture slide images to do practice problems as well as take notes while watching the lecture.

  • Intro 0:00
  • Lesson Overview 0:19
    • Lesson Overview
  • .php To HTML 1:00
    • .php To HTML
  • PHP Delimiters 2:20
    • PHP Delimiters: Opening & Closing PHP Tags
  • 'Hello, World!' Example 4:34
    • Echo Statement & PHP Tags
    • Adding Second Heading
  • Homework Challenge 9:56
    • Homework Challenge

Transcription: Your First PHP Script

Hello again, and welcome back to Educator.com's Introduction to PHP course.0000

In today's lesson, we are going to be introducing you to your first PHP script, a script called helloWorld.php,0005

that is a mixture of PHP code and HTML and outputs a simple HTML message.0011

What specifically are we going to cover in today's lesson?0022

First of all, we are going to cover how a PHP file gets converted to HTML.0024

We know that, on our web server, when we request a PHP file, Apache invokes the PHP Interpreter to process it.0032

And the PHP Interpreter processes the file, generates HTML, and sends it back to Apache, which sends it back to the client.0040

We are going to talk a little bit more about that process.0047

We are also going to introduce the concept of PHP delimiters, which are also known as PHP opening and closing tags.0049

And we are going to have another homework challenge to discuss.0055

PHP to HTML--how does that work?0062

Well, first of all, as mentioned, we know that, when a PHP page is requested, the PHP Interpreter is invoked by Apache.0065

And basically, from an input/output point of view, the PHP takes a text file as input and generates some sort of output.0073

Now, PHP is a general scripting language, so it always is going to take a text file as an input, because it is not just using the Web...0080

It doesn't always generate HTML output; it can generate things like PDFs and images, and other kinds of text files, like XML.0090

However, for this course, because it is a Web-based course, we are going to be dealing with text files0098

that have the .php extension and/or a combination of both HTML and PHP code.0103

The PHP Interpreter is going to process these files, and on the other end, it is going to generate HTML output.0130

Essentially, it is going to be generating HTML dynamically, on the fly.0136

How does PHP know when it receives a .php as its input what is PHP code and what is HTML?0143

The answer is in what are known as PHP delimiters, also called opening and closing PHP tags.0150

Basically, these are special tags that inform the PHP Interpreter that it's about to interpret some PHP code.0158

The pair of tags are right here: this one is the opening PHP tag--it is a less than sign,0165

followed immediately by a question mark, followed immediately by the lowercase characters php.0175

And the closing tag is simply a question mark followed by a greater than sign.0180

So basically, anything the PHP Interpreter encounters between these two tags, it is going to treat as code.0186

Now, everything outside of those tags, PHP just treats as text, and it simply passes it to output.0192

As PHP processes your file, if it encounters HTML, it simply passes it along to output.0198

Once it reaches a group of PHP delimiters, it executes any code in there; and if there is output to be generated,0205

adds it to the output it has already passed along.0212

When it exits out of the PHP code snippet, then it goes ahead and passes on any more HTML0215

or other text it finds, until it reaches the end of the file.0222

Now, when entering PHP mode, or when a PHP Interpreter encounters a PHP opening tag,0225

That is called escaping from HTML, and you are entering into PHP mode.0232

Once the closing delimiter is reached, the ending PHP tag, you are said to be returning to HTML mode.0238

Within any single PHP file, you can intermingle PHP code and HTML as often as desired.0247

So, you can basically start off in HTML, process a little PHP code, get back to HTML, output something,0256

go back into PHP code, do a little processing, and so forth, as often as needed, throughout your file.0264

Let's actually take a look at our first PHP file, called helloWorld.php.0269

This is helloWorld.php; we have opened it up in our text editor, PSPAD, which we installed in the last lesson.0276

And you can see that we have some simple HTML tags: opening and closing HTML and body tags.0282

And then, we can see the PHP opening and closing tags, or delimiters, that we had just talked about.0293

Within the PHP delimiters, everything that PHP finds, it executes as code.0300

And so, basically, there is one line of code within these PHP tags, and it's what is known as an echo statement.0307

An echo statement simply outputs any text after the echo statement that is between a pair of quotation marks, and adds that to the output.0314

And the way you do that: you write echo, and then a space, your text you would like to output--0324

in this case, it's an HTML header tag with the "Hello, World!" message--0329

and then, after the quotation ends, you finish it off with a semicolon.0337

When PHP processes this file, it starts at the beginning, and all it sees is HTML, so it starts just passing that on as is to output.0342

It reaches this PHP tag, and it says, "OK, now I'm in PHP code; I have escaped from HTML."0352

"Let me process what is in here...OK, I have found an echo statement, and an echo statement outputs text."0357

So it says, "What is it outputting?" It outputs "Hello, World!" in an H1 header tag.0363

What it is going to do is add that to the HTML up here that it has already passed along.0370

Once it finishes processing the echo statement, it is going to exit out of PHP mode back into HTML mode,0374

and then pass everything else it finds onto the output.0380

It is going to add it onto the "Hello, World!" text it outputted, as well as these intro tags.0384

If we were to go and view this web page...start Firefox...0391

and I have it saved in the lecture_4 directory of the intro2php directory that we talked about in the last lesson...0398

and if we view helloWorld.php, we will see the message "Hello, World!"0406

And actually, if we go ahead and view the page source for this (I'll blow it up a little bit here),0410

We can see the HTML code, which is passed on as is by the PHP Interpreter, as expected,0417

and instead of the PHP code fragment in between the code delimiters right here--the PHP delimiters--0424

it has been replaced with the HTML itself that was output.0435

So, this PHP section up here is replaced with the HTML that that code section output.0440

And that is how PHP interprets the file when it goes into and out of HTML mode.0447

As mentioned, you can do that as often as needed.0454

So, as an example, you could actually add another header statement here in HTML mode.0456

We're in HTML mode right now, because we are not between the PHP delimiters.0463

Let's call it Second Heading and close the header statement.0467

And begin another block of PHP code, using the opening and closing tags.0476

I'm going to create another echo statement, which is just echo, followed by a space, followed by a quoted piece of text.0483

In this case, I'm going to create another header and head it up with the message Second PHP Block, and end it with a semicolon.0491

Now, if we save the file, and we go to view it, what we should see is the code up here outputted as before.0505

When we leave the PHP code, we will enter back into HTML mode.0516

So, we should see this statement just as is in our HTML source code.0519

And this PHP code is going to do the same thing as up here: it is going to output another piece of text.0527

Let's go ahead and view this in our web browser again.0533

We saved it, and we refreshed the page; and now we have the three different headers.0536

If we go and look at the page source (let's pull it up again), we can see the HTML opening and closing tags and the body tags.0541

We can see the original HTML output by our first PHP code block.0550

And if we look back at the source code file, we can see the second heading here0559

that was output as is by the PHP Interpreter, because it was in HTML mode.0566

And then again, the second echo statement right here was simply output0572

and added to the rest of the output that the PHP had generated along the way.0578

Finish off with the closing tags, and it reached the end of the file.0583

That is how PHP works, going into and out of PHP mode.0586

And we are going to be using that all throughout this course; this is sort of a basic example.0590

So, I would like to introduce you to another homework challenge that I would like to have you do.0598

Again, it is another hands-on opportunity to work with PHP code.0603

What we would like would be to have you re-create the Hello World example, or script, that we did in this class, by hand, on your own.0610

Open PSPAD; type everything by hand; and it may have the tendency to want to copy and paste,0617

but the idea is that you really want to code the text yourself, because you will learn about making mistakes.0624

You will learn that maybe you forgot how to write the PHP closing tag correctly.0629

Maybe you left off the question mark or something; maybe in your echo statement, you forgot to put quotation marks around your text.0633

So, I really encourage you to go ahead and code the file on your own.0643

Then, you should save the file as helloWorld.php, and I want you to save it in the appropriate folder0648

of your Apache document root, so that you browse to it at this URL right here.0656

And the reason we are having you do that is, again, to reinforce what we learned in the last lesson,0664

which is learning how the local files saved on your computer below the document root map to localhost URL's.0669

And as you go along, you might see (if you make any mistakes) some error messages.0680

Try to figure out where you went wrong with your code--if you didn't save it in the right spot...0685

for example, if you are having trouble viewing it, or if you are getting an error message from PHP.0690

Also, be sure to make sure that Apache is properly started0694

and that you appropriately escape in and out of HTML using the PHP delimiters.0699

And also, if you make any mistakes, PHP will give you error messages that have a line number listing where the error was made.0706

And so, you can go back to your source code.0713

Maybe it says there is an error on line 11--maybe you left out this initial quotation mark here.0715

So, if we go and run this again, we will get an error that there was an error on line 11.0724

We can go back to PSPAD; and the way you do that is: you have to turn on line numbers in PSPAD.0731

And then, that way, you can see that on line 11, this is where your error was.0739

You can go back in, add the quotation mark, and save the file.0743

And when you reload it, everything should work as before.0750

That reaches the end of today's lecture; thank you for watching Educator.com, and we look forward to seeing you at the next lecture.0755

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