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Matthew M.

Matthew M.

Web Application Development

Slide Duration:

Table of Contents

I. Advanced PHP with MySQL
Course Introduction

13m 36s

Intro
0:00
Advanced PHP w/ MySQL
0:13
Course Introduction
0:14
Course Content
0:59
Web Application: Educator Store
1:45
Web Application: Educator Store
1:46
Object-Oriented Programming
6:09
Object-Oriented Programming Overview
6:10
MySQL
6:50
MySQL Overview
6:51
Example: Command Prompt & MySQL
8:34
What You Will Learn
9:34
What You Will Learn
9:35
Course Prerequisites
11:52
Course Prerequisites
11:53
Advanced Course Development Environment

18m 46s

Intro
0:00
Lesson Overview
0:11
Lesson Overview
0:12
Development Environment Setup
1:36
Firefox Web Browser, XAMPP, and PSPad Text Editor
1:37
Course Directory Structure
4:36
Course Directory Structure
4:37
phpDocumentor
7:23
phpDocumentor Overview
7:24
Parsing Source Code
7:44
docs Subdirectory
9:06
Asvanced PHP Course Documentation Example
10:21
Previous Educator PHP Students
14:14
Lib Directory Changes
14:38
Images Directory Changes
14:57
VERSION Constant
15:40
Comments Noting a Specific Version Number
17:04
Homework Challenge
17:30
Homework Challenge
17:31
Introduction to File I/O

35m 37s

Intro
0:00
Lesson Overview
0:10
Lesson Overview
0:11
File I/O
1:34
File I/O Overview
1:35
Performing file I/O: 3 Steps
1:52
File Permissions
2:28
Read Permission & Write Permission
2:29
fopen()
4:47
fopen()
4:48
Two Required Parameters
5:01
Successful fopen(): File Handle and Resource
5:21
FALSE and E_WARNING Error
6:00
Example
6:39
File Paths
7:10
File Paths
7:11
File Access Modes
9:18
File Access Modes
9:19
Coding Example: fopen()
10:31
Using Relative and Absolute Path & Non-Existent File
10:32
File Pointers
15:55
File Pointers
15:56
Example File
16:11
Opening a File with fopen() Using 'r' as the Access Mode
16:22
fgets()
17:55
fgets() Overview
17:56
Coding Example: fgets() - Reading a Line at a Time
18:26
feof()
20:10
feof() Overview
20:09
Coding Example: feof()
20:50
fclose()
23:43
fclose() Overview
23:44
Coding Example: fclose()
25:02
Coding Example: Current Stock
26:10
Coding Example: Current Stock
26:11
trim ()
31:39
trim () Overview and Example
31:40
Homework Challenge
33:35
Homework Challenge
33:36
Web Application Development

36m 36s

Intro
0:00
Lesson Overview
0:16
Lesson Overview
0:17
Version 1.0 Changelog
0:31
catalog.php
0:32
Function Library: fileLIB.php
5:00
Version 1.1 Changelog
27:12
createItemDataArray() and createDeptDataArray()
27:13
outputSimpleItemLink() and outputSimpleDeptLink()
32:06
HTTP & the POST Method

34m 36s

Intro
0:00
Lesson Overview
0:10
Lesson Overview
0:11
HTTP Model
1:28
HTTP Model
1:29
Client-Server Model 2 Steps Process
2:00
HTTP Messages
2:23
HTTP Messages
2:24
HTTP Requests
3:09
HTTP Requests
3:10
Example: HTTP Request Header
3:17
Coding Example: HTTP Requests
4:29
HTTP Responses
7:15
HTTP Responses
7:16
Example: HTTP Response (Header & Body)
8:00
header()
11:47
header() Overview
11:48
Coding Example: header
14:02
Coding Example: header() Error
14:52
GET Method
18:55
GET Method
18:56
Coding Example: GET Method
20:13
POST Method
21:09
POST Method
21:10
Coding Example: Sample Form Using the POST Method
23:50
Accessing POST Data in PHP
26:38
Accessing POST Data in PHP
26:39
Coding Example: Accessing POST Data via $_POST
28:15
GET vs. POST
29:54
GET vs. POST
29:55
Example: Accessing POST Data via $_POST
31:20
Example: Accessing POST Data via $_POST
31:21
Homework Challenge
33:00
Homework Challenge
33:01
Web Application Development

14m 11s

Intro
0:00
Version 2.0 Changelog
0:09
Updating the Site's Current Form to Use the POST Method
0:10
Creating Admin Website
2:55
Dynamically Generated Department List
12:40
Writing to Files

17m 38s

Intro
0:00
Lesson Overview
0:09
Lesson Overview
0:10
Review of File I/O
0:40
Review of File I/O
0:41
fwrite()
1:38
fwrite()
1:39
fputs()
2:20
'r+'
2:31
Coding Example: fwrite()
2:59
fopen() Access Modes
8:41
'a' and 'a+'
8:42
'w' and 'w+'
11:34
Homework Challenge
14:47
Homework Challenge
14:48
Web Application Development

28m 14s

Intro
0:00
Lesson Overview
0:08
Lesson Overview
0:09
Updated Open File Functions
0:19
openItemsDataFile ( ), openDeptsDataFile ( ), and openLastAddedFile ( )
0:20
insertItem()
6:25
insertItem() Overview
6:26
Functions: createItemDataString ( ) and updateLastItemAdded ( )
7:07
addItemToDepartment ()
16:03
addItemToDepartment () Overview
16:04
Functions: createDeptDataString ( ) and updateDepartment ( )
17:55
HTTP POST: File Uploads

22m 51s

Intro
0:00
Lesson Overview
0:10
Lesson Overview
0:11
POST Data Encoding
1:13
POST Data Encoding
1:14
When Data is Included in the Body of the HTTP POST Request and is of the Content Type
1:31
When Uploading Files Using HTTP POST
3:17
Uploading Files
6:22
Uploading Files
6:23
If Encoding Type is Not Set to Multipart/Formdata
9:27
$_FILES Superglobal
10:59
$_FILES Superglobal
11:00
Structure of $_FILES
12:15
Structure of $_FILES: Name, Type, tmp_name, Error, and Size
12:16
Coding Example: $_FILES Superglobal
13:34
Moving an Uploaded File
15:39
Introduction to Moving an Uploaded File
15:40
move_uploaded_file ( ): Definition and Example
16:40
Homework Challenge
21:19
Homework Challenge
21:20
Web Application Development

15m 30s

Intro
0:00
Lesson Overview
0:09
Lesson Overview
0:10
Uploading Item Image File
1:22
Uploading Item Image File
1:23
Uploading Item Image File (cont.)
2:43
Altering insertItem ( )
2:44
Helpfer Functions: getFileExtension ( ) and moveUploadedFile ( )
4:30
isValidItem ( )
13:03
Introduction to Object-Oriented Programming

32m 44s

Intro
0:00
Lesson Overview
0:11
Lesson Overview
0:12
Object-Oriented Programming
0:56
Introduction to Object-Oriented Programming
0:57
Associative Arrays
5:27
Associative Arrays
5:28
Classes
7:27
Classes Overview
7:28
Defining Classes
8:24
Defining Classes
8:25
Declaring Class Properties
9:25
Coding Example: Classes
10:11
Objects
12:18
Objects Overview
12:19
Classes vs. Objects
12:49
Classes vs. Objects
12:50
Instantiating Classes
14:58
Instantiating Classes
14:59
Coding Example: Instantiate an Item Object
16:30
Object Properties
19:21
Access and Set an Object's Property
19:22
Coding Example: Set & Access the Properties of an Item Object
24:23
Homework Challenge
30:22
Homework Challenge
30:23
Web Application Development

17m 47s

Intro
0:00
Lesson Overview
0:11
Lesson Overview
0:12
Version 5.0 Overview
0:50
Version 5.0 Overview and Examples
0:51
Outputting Object Properties
12:38
Outputting Object Properties
12:39
Array Object Properties
14:18
Access and Set Array Value
14:19
Object Methods

39m 57s

Intro
0:00
Lesson Overview
0:12
Lesson Overview
0:13
Object Methods
0:52
Definition of Object Methods
0:53
Calling Object Methods
3:25
Calling Object Methods
3:26
Coding Example: Simple Object Methods
4:44
Object Methods and Return Values
7:02
$this Variable
10:06
$this Variable: Definition and Example
10:07
$this Variable (cont.)
15:51
$this Variable (cont.)
15:52
Getters & Setters
21:21
Getters & Setters Methods
21:22
Object Methods In Strings
25:46
Object Methods In Strings
25:47
Coding Example: Outputting Method Return Values in Strings
27:41
Using $this to Call Other Methods
28:49
Using $this to Call Other Methods
28:50
Homework Challenge
34:18
Homework Challenge: 1-3
34:19
Homework Challenge (cont.)
36:20
Homework Challenge: 4-6
36:21
Homework Challenge (cont.)
37:52
Homework Challenge: 7-10
37:53
Web Application Development

17m 30s

Intro
0:00
Lesson Overview
0:11
Lesson Overview
0:12
Version 6.0 Overview
0:40
Version 6.0 Changes & Examples
0:41
Item Methods
0:53
Item Class Definition: getImageFilename()
0:54
Coding Example: getImageFilename()
1:58
Department Methods
7:33
addItem(), removeItem(), and isItemInDept() Method
7:34
addItemtToDepartment() & buildDeptObject() Functions
11:46
A Default Value Needed to Be Set for $items
16:26
Object Constructors

22m 20s

Intro
0:00
Lesson Overview
0:11
Lesson Overview
0:12
Object Constructors
0:32
Introduction to Object Constructors
0:33
Coding Example: Object Constructors
1:43
Defining Constructors
3:26
Defining Constructors
3:27
Coding Example: Constructors with No Arguments
4:24
Constructor Arguments
8:09
Constructor Arguments
8:10
Coding Example: Constructor Arguments
9:49
Important Notes
16:13
Important Notes
16:14
Homework Challenge
17:35
Homework Challenge: 1 - 4
17:36
Homework Challenge (cont.)
19:13
Homework Challenge: 5 - 9
19:14
Homework Challenge (cont.)
21:40
Homework Challenge: 10 and 11
21:41
Web Application Development

16m 19s

Intro
0:00
Lesson Overview
0:11
Lesson Overview
0:12
Version 7.0 Overview
0:39
Version 7.0 Overview
0:40
Item Constructor
2:19
Item Constructor
2:20
Department Constructor
7:47
Department Constructor
7:48
Customer Constructor
12:23
Customer Constructor
12:24
More Magic Methods

53m 37s

Intro
0:00
Lesson Overview
0:13
Lesson Overview
0:14
Magic Methods
1:12
Magic Methods
1:13
Destructors
2:45
Destructors Overview
2:46
Coding Example: Calling Destructors
4:30
Coding Example: Object Destructor
9:19
_to String ()
16:12
_to String () Overview
16:13
Coding Example: _to String () Magic Method
18:10
Access Modifiers
21:23
Introduction to Access Modifiers
21:24
Access Modifiers: Public
21:39
Access Modifiers: Private
22:18
Access Modifiers: Protected
22:41
Object Properties and Methods
23:06
Coding Example: Public Access Modifiers
26:48
Coding Example: Private Access Modifiers
28:30
_get()
31:37
_get() Overview
31:38
Coding Example: _get () Magic Method
33:30
_set ()
36:23
_set () & the Magic Method
36:24
Using Getters & Setters
44:37
Coding Example: Using Getters & Setters
44:38
Homework Challenge
50:33
Homework Challenge: 1 - 6
50:34
Homework Challenge (cont.)
51:41
Homework Challenge: 7 - 12
51:42
Web Application Development

31m 12s

Intro
0:00
Version 8.0 Review
0:12
Version 8.0 Review
0:13
private Object Properties
1:15
private Object Properties
1:16
Coding Example
2:54
_toString() Methods
6:51
_toString() Methods
6:52
Coding Example
8:09
DataFile Class
13:27
DataFile Class & I/O Operations
13:28
Using DataFile Class: Instantiate a DataFile, DataFile open () Method, and DataFile close () Method
18:09
Homework Challenge
29:35
Homework Challenge
29:36
Classes vs. Objects

37m 49s

Intro
0:00
Lesson Overview
0:09
Lesson Overview
0:10
Class vs. Object Review
0:58
Class vs. Object Review
0:59
Static Properties
2:42
Static Properties
2:43
Scope Resolution Operator (::)
5:26
Scope Resolution Operator (::) & Static Property
5:27
Coding Example: Accessing a Static Property Using the Scope Resolution Operator
7:57
Coding Example: Accessing a Static Property in a Class Definition
10:33
Coding Example: Using a Static Property as an Instance Counter
14:18
Static Methods
18:51
Static Methods Overview
18:52
Coding Example: Static Methods
21:39
Classes vs. Objects
26:28
Classes vs. Objects: Diagrams
26:29
Class Constants
30:24
Class Constants Definition
30:25
Coding Example: Using Class Constants
31:55
Homework Challenge
34:01
Homework Challenge: 1 - 5
34:02
Homework Challenge (cont.)
35:25
Homework Challenge: 6 - 10
35:26
Web Application Development

21m 7s

Intro
0:00
Version 9.0 Overview
0:12
Version 9.0 Changes & Examples
0:13
Output Class
1:08
Output Class & Static Methods
1:09
outputHtmlSelector ( ) Method
2:43
outputItemSelector ( ) Method
4:53
outputDeptSelector ( ) Method
6:42
buildObject() Methods
11:54
buildObject() Methods & Examples
11:55
Exceptions

22m 43s

Intro
0:00
Lesson Overview
0:12
Lesson Overview
0:13
try Blocks
0:44
try Blocks Definition
0:45
catch Blocks
2:03
catch Blocks: Definition and Syntax
2:04
Coding Example: try/catch Blocks
3:48
When an Exception Object is Caught & Error Handling
5:59
Exception Class
7:02
Exception Class
7:03
Coding Example: Using try/catch to Catch an Exception Thrown from a Method
8:04
Re-Throwing Exceptions
16:39
Re-Throwing Exceptions
16:40
Coding Example: Re-throwing an Exception
17:21
Homework Challenge
20:40
Homework Challenge: 1 - 5
20:41
Homework Challenge (cont.)
22:17
Homework Challenge: 6
22:18
Web Application Development

22m

Intro
0:00
Version 10.0 Overview
0:11
Updating addItem.php, addItemToDept.php, and error.php
0:12
Updating DataFile Class: open ( ) Method & try/catch blocks
7:45
Version 10.1 Overview
13:37
Version 10.1 Changes & Examples
13:38
Updating DataFile Class: close ( ) Method & logWarning ( )
20:17
Cookies

39m 47s

Intro
0:00
Lesson Overview
0:09
Lesson Overview
0:10
What is a Cookie?
1:15
Definition of Cookie
1:16
HTTP - A Stateless Protocol
2:17
HTTP - A Stateless Protocol
2:18
Purpose of Cookies
4:10
Set - Cookie Header
6:21
Introduction to Set - Cookie Header
6:22
Coding Example: Set - Cookie Header
7:38
Cookie Header
9:45
Introduction to Cookie Header
9:46
Example: Cookie Header
10:27
setcookie()
12:33
Introduction to setcookie()
12:34
Example: Using setcookie
13:54
Cookies Attributes
15:48
Cookies Attributes Overview
15:49
Common Cookies Attributes: Domain
16:24
Common Cookies Attributes: Path
17:04
Common Cookies Attributes: Expires
19:34
Coding Example: Setting Cookie Attributes
20:58
$_COOKIE Superglobal
27:03
$_COOKIE Superglobal
27:04
Coding Example: Accessing Cookies from PHP Using $_COOKIE
29:45
Security Implications
34:44
Security Implications
34:45
Homework Challenge
36:10
Homework Challenge: 1 - 4
36:11
Homework Challenge (cont.)
37:47
Homework Challenge: 5 - 7
37:48
Web Application Development

39m 11s

Intro
0:00
Lesson Overview
0:17
Lesson Overview
0:18
instanceof Operator
1:34
instanceof Operator
1:35
Objects with Object Properties
2:53
Objects with Object Properties
2:54
Version 11.0 Overview
6:41
Version 11.0 Changes: Cart and CartItem Classes
6:42
Version 11.0 Coding Example
10:40
Version 11.1 Overview
31:03
Version 11.1 Changes & Examples
31:04
Introduction to Sessions

46m 8s

Intro
0:00
Lesson Overview
0:08
Lesson Overview
0:09
What is a Session?
0:53
What is a Session?
0:54
Client-Side Sessions
3:51
Client-Side Sessions
3:52
Server-Side Sessions
5:04
Server-Side Sessions
5:05
Session IDs
6:26
Session IDs
6:27
The SID is Used by the Server to:
7:08
A Client Passes an SID to the Server with Each HTTP Request Via:
8:15
Sessions in PHP
12:19
Sessions in PHP
12:20
session_start()
14:40
session_start() Overview
14:41
Coding Example: Using session_start () to Continue a Session
18:03
$_SESSION Superglobal
22:06
$_SESSION Superglobal Overview
22:07
Coding Example: Setting a Session Variable via $_SESSION
25:22
Accessing Session Data
28:08
Accessing Session Data
28:09
Deleting Session Data
31:43
Deleting Session Data
31:44
Coding Example: Deleting Session Data
32:16
Configuring PHP Sessions
36:14
session.cookie_lifetime, session.cookie_domain, and session.cookie_path
36:15
Coding Example: Configuring PHP Sessions
37:28
Configuring PHP Sessions (cont.)
40:56
session.use_cookies, session.use_trans_sid, and session.use_only_cookies
40:57
Coding Example: Configuring PHP Sessions
42:25
Homework Challenge
42:55
Homework Challenge: 1 - 5
42:56
Homework Challenge (cont.)
44:10
Homework Challenge: 6 - 10
44:11
Homework Challenge (cont.)
45:27
Homework Challenge: 11 - 13
45:28
Web Application Development

11m

Intro
0:00
Version 12.0 Overview
0:12
Version 12.0 Changes Part I: Updating 'viewCart.php' & 'checkout.php'
0:13
Version 12.0 Changes Part II
5:03
Destroying Sessions

29m 59s

Intro
0:00
Lesson Overview
0:12
Lesson Overview
0:13
Destroying Sessions
1:02
Destroying Sessions
1:03
session_destroy()
2:10
session_destroy() Overview
2:11
Coding Example: Setting a Session Variable and Destroying a Session
3:18
Deleting Session Cookies
8:38
Deleting Session Cookies
8:39
Coding example: Deleting Session Cookies
9:17
Review of Steps
21:07
Review of Steps
21:08
Garbage Collection
21:50
Garbage Collection Overview
21:51
Coding Example: Garbage Collection
24:30
Homework Challenge
26:28
Homework Challenge: 1 - 4
26:29
Homework Challenge (cont.)
28:16
Homework Challenge: 5 - 9
28:17
Web Application Development

19m 14s

Intro
0:00
Lesson Overview
0:13
Lesson Overview
0:14
_autoload()
0:46
Introduction to _autoload ()
0:47
Version 13.0 Overview
4:06
_autoload () and SessionManager Class
4:07
Updating 'viewCart.php' & 'checkout.php'
11:16
Introduction to Databases

21m 24s

Intro
0:00
Lesson Overview
0:16
Lesson Overview
0:17
Flat Files
1:09
Flat Files: Definition and Example
1:10
Problems Associated with Using Flat Files as a Database
2:15
Relational Databases
3:29
Relational Databases
3:30
Relational Database Management System (RDBMS)
3:50
Tables
7:43
Tables
7:44
Columns
9:24
Columns
9:25
What is SQL?
10:45
Introduction to Structured Query Language
10:46
Standard Data Types of SQL
12:23
Primary Keys
13:19
Primary Keys
13:20
Primary Key Examples
16:36
Primary Key Examples
16:37
Introduction to MySQL

28m 11s

Intro
0:00
Lesson Overview
0:11
Lesson Overview
0:12
What is MySQL?
1:33
MySQL
1:34
MySQL Monitor
5:16
MySQL Monitor Overview
5:17
XAMPP & MySQL
5:58
In the MySQL Command: hostname, username and -p
7:05
Connecting to a MySQl Server
9:52
Connecting to a MySQl Server
9:53
Using MySQl Monitor
13:48
Using MySQl Monitor
13:49
GRANT Command
15:10
GRANT SQL Command
15:11
Privileges & Objects
18:18
Username, Hostname, and Password
19:37
Specifying Objects
20:05
Creating a PHP User Account
21:41
Creating a PHP User Account Overview
21:42
Meaning of all & *.*
23:35
Example: Creating a PHP User Account
23:48
Required Homework
26:27
Required Homework: 1 - 5
26:28
Required Homework (cont.)
27:28
Required Homework: 6
27:29
Creating Databases & Tables

23m 1s

Intro
0:00
Lesson Overview
0:08
Lesson Overview
0:09
Creating a Database
1:40
Introduction to Creating a Database
1:41
Example: Creating a Database
3:33
CREATE TABLE Command
6:43
CREATE TABLE Command
6:44
Data Types
7:39
Numeric Data Types: INT, INT UNSIGNED, and DECIMAL
7:40
String Data Types: CHAR (M), VARCHAR (M), and TEXT
9:23
Colum Attributes
11:00
PRIMARY KEY Attribute
11:01
AUTO INCREMENT Attribute
11:35
Items Table
13:07
Items Table
13:08
Useful Commands
17:04
SHOW TABLES Command & DESCRIBE Utility Statement
17:05
Example: Creating an Items Table
17:58
Required Homework
20:51
Required Homework: 1 - 6
20:52
Required Homework (cont.)
21:55
Required Homework: 7 - 9
21:56
SQL Command: INSERT

27m 11s

Intro
0:00
Lesson Overview
0:11
Lesson Overview
0:12
INSERT Command
1:20
SQL INSERT Command
1:21
Specifying Values
3:16
Columns with Numeric Data Types
3:17
Columns with String Data Types
3:34
Columns with AUTO INCREMENT
4:07
Inserting Items
5:21
Inserting Items
5:22
Example: Inserting Items
7:03
SQL Text Files
14:04
SQL Monitor Client
14:05
MySQL Monitor & the < Operator
15:15
Example
17:35
Required Homework
22:32
Required Homework: 1 - 6
22:33
Required Homework (cont.)
24:19
Required Homework: 7 - 10
24:20
SQL Command: SELECT

24m 57s

Intro
0:00
Lesson Overview
0:10
Lesson Overview
0:11
SELECT Command
0:42
SELECT Command: Definition and Syntax
0:43
Results of a SELECT Query
1:53
To Specify the Retrieval of All Columns from a Table
3:06
Example: SELECT Command
4:18
WHERE Clause
7:11
WHERE Clause
7:12
A SELECT Query with WHERE Clause has the Following Syntax
8:10
A Where Condition can Contain both Logical and Comparison Operators
9:44
Literal Values
13:24
Literal Values
13:25
Example: Literal Values
14:18
ORDER BY Clause
15:31
ORDER BY Clause & SELECT Query
15:32
Ascending and Descending Order
17:30
An ORDER BY Clause can Specify Multiple Columns to Order the Rows by
18:01
Example: SELECT Query with WHERE and ORDER BY Clause
20:32
Homework Challenge
21:59
Homework Challenge
22:00
Homework Challenge (cont.)
23:54
Homework Challenge
23:55
Using PHP from MySQL

32m 43s

Intro
0:00
Lesson Overview
0:10
Lesson Overview
0:11
PHP/MySQL Architecture
0:56
PHP/MySQL Architecture
0:57
MySQLi Extension
3:05
MySQLi Extension
3:06
Steps to Using MySQL from PHP
5:53
Four Steps to Using MySQL from PHP
5:54
Step # 3
7:18
Connecting to a Database
8:12
To Connect to a MySQL Database
8:13
To Test for Connection Errors
10:20
Running an SQL Statement
11:54
Running an SQL Statement
11:55
Example
13:30
Processing the Results
15:58
For non-SELECT Queries
15:59
MySQLi Object Property: affected_rows
16:19
For INSERT Statements on Tables with an AUTO_INCREMENT Column
18:07
Closing the Connection
19:45
Closing the Connection
19:46
Coding Example
21:24
Coding Example: Using MySQL from PHP
21:25
Homework Challenge
29:00
Homework Challenge: 1 - 4
29:01
Homework Challenge (cont.)
31:10
Homework Challenge: 5 - 9
31:11
Web Application Development

30m 30s

Intro
0:00
Lesson Overview
0:14
Lesson Overview
0:15
sprintf()
1:28
sprintf() Overview
1:29
Example
1:56
INSERT Statements with sprintf()
5:15
INSERT Statements with sprintf()
5:16
Version 14.0 Overview
10:00
Version 14.0 Changes & Examples Part 1
10:01
Version 14.0 Changes & Examples Part 2
21:58
SELECT QUERIES from PHP

24m 22s

Intro
0:00
Lesson Overview
0:14
Lesson Overview
0:15
SELECT Queries
1:21
SELECT Queries
1:22
MySQLi_Result Class
3:17
MySQLi_Result Class: num_rows
3:18
MySQLi_Result Class: fetch_assoc ( ) and fetch_object ( )
3:59
fetch_assoc()
5:17
fetch_assoc() Overview
5:18
Coding Example: Using fetch_assoc()
9:00
stdClass Objects
12:46
stdClass Objects
12:47
fetch_object()
14:19
fetch_object() Overview
14:20
Coding Example: Using fetch_object()
16:45
Freeing Result Set Memory
18:42
Freeing Result Set Memory
18:43
Coding Example: Using free ( )
20:01
Homework Challenge
22:07
Homework Challenge: 1 - 5
22:08
Web Application Development

17m 6s

Intro
0:00
Version 15.0 Overview
0:13
Version 15.0 Changes & Examples Part 1
0:14
Version 15.0 Changes & Examples Part 2
8:43
Linking Tables

24m 32s

Intro
0:00
Lesson Overview
0:16
Lesson Overview
0:17
A Departments Table
1:08
Departments Table
1:09
How Could We Model This in a Table: Option 1
1:26
How Could We Model This in a Table: Option 2
3:12
Database Normalization
4:37
Database Normalization
4:38
Foreign Keys
8:47
Foreign Keys
8:48
Linking Table
11:26
Linking Table
11:27
Multiple Column Primary Keys
15:30
Multiple Column Primary Keys
15:31
Example
18:51
Required Homework
22:34
Required Homework: 1 - 3
22:35
Required Homework (cont.)
24:10
Required Homework: 4
24:11
Web Application Development

24m

Intro
0:00
Version 16.0 Overview
0:11
Version 16.0 Changes
0:12
Version 16.0 Coding Examples
4:12
Version 16.0 (cont.)
18:30
Version 16.0 Changes & Examples Part 2
18:31
SQL Command: DELETE

10m 33s

Intro
0:00
Lesson Overview
0:12
Lesson Overview
0:13
DELETE Statement
0:30
DELETE Statement & Its WHERE Clause
0:31
Delete All Rows From a Table
2:57
Using DELETE from PHP
4:04
Using DELETE from PHP Overview
4:05
Coding Example: Using DELETE from PHP
6:37
Homework Challenge
8:53
Homework Challenge: 1 - 4
8:54
Web Application Development

16m 2s

Intro
0:00
Version 17.0 Overview
0:11
Version 17.0 Changes
0:12
Version 17.0 Coding Example
2:51
Transactions
12:50
Database Transaction
12:51
Steps in Using Transactions
14:00
SQL Command: UPDATE

32m 14s

Intro
0:00
Lesson Overview
0:10
Lesson Overview
0:11
UPDATE Statement
0:54
UPDATE Statement & Its WHERE Clause
0:55
Example: UPDATE Statement
3:32
Using UPDATE from PHP
5:21
Using UPDATE from PHP Overview
5:22
Coding Example: Using UPDATE from PHP
6:53
htmlspecialchars()
9:04
htmlspecialchars()
9:05
Encoding Special Characters
9:23
Coding Example: htmlspecialchars()
13:41
addslashes()
20:40
addslashes()
20:41
Coding Example: addslashes()
22:52
Homework Challenge
27:55
Homework Challenge: 1 - 2
27:56
Homework Challenge (cont.)
30:14
Homework Challenge: 3 - 5
30:15
Homework Challenge (cont.)
30:41
Homework Challenge: 6 - 9
30:42
Web Application Development

12m 33s

Intro
0:00
Version 18.0 Overview
0:12
Version 18.0 Changes
0:13
Version 18.0 Coding Example
1:24
SQL: Joins

42m 16s

Intro
0:00
Lesson Overview
0:11
Lesson Overview
0:12
DATETIME Data Type
1:52
DATETIME Data Type
1:53
Modeling Orders
5:12
Modeling Orders
5:13
Customers Table
10:46
Customers Table
10:47
Example
16:18
Example: Order Table in MySQL
16:19
Joins
22:26
Joins Overview
22:27
Inner Join
23:09
Example: Joins
24:11
Join Conditions
28:14
Join Conditions
28:15
Example
28:32
Join Queries
30:00
Example: Join Conditions in MySQL
30:36
Implicit Joins
34:42
Implicit Joins
34:43
Example: Implicit Joins
35:57
Aliases
37:28
Introduction to Aliases
37:29
Example: Aliases
38:55
Required Homework
40:32
Problem 1
40:33
Problem 2
41:01
Problem 3
41:17
Web Application Development

29m 34s

Intro
0:00
Lesson Overview
0:12
Lesson Overview
0:13
Inserting Orders
0:44
Inserting Orders
0:45
Version 19.0 Overview
3:45
Version 19.0 Changes & Example Part 1
3:46
Version 19.0 Changes & Example Part 2
13:18
Version 19.1 Overview
21:10
Version 19.1 Changes
21:11
Version 19.1 Coding Example
22:18
User Authentication

26m 13s

Intro
0:00
Lesson Overview
0:10
Lesson Overview
0:11
User Authentication
1:31
User Authentication
1:32
Authentication with Sessions
2:34
Authentication with Sessions
2:35
Four Steps in Authentication via Sessions
2:50
Using Sessions to Restrict Access
3:58
Using Sessions to Restrict Access
3:59
Coding Example: Restricted Access Area
4:47
Authentication Methods
5:54
Authentication Methods Overview
5:55
Coding Example: Authentication Methods
7:31
Logging Out
9:57
Logging Out
9:58
Coding Example: Log Out
10:47
Users Table
13:50
Users Table
13:51
Example: Creating a Users Table
15:08
Password Hashing
17:30
Password Hashing
17:31
PHP and MySQL Built-in Hash Functions: sha1 ( ) and md5 ( )
18:43
Coding Example: Password Hashing
19:27
Required Homework
24:41
Required Homework: 1 - 4
24:42
Web Application Development

14m 36s

Intro
0:00
Version 20.0 Overview
0:13
Version 20.0 Changes & Examples Part 1
0:14
Version 20.0 Changes & Examples Part 2
5:05
Version 20.0 Changes & Examples Part 3
7:29
Version 20.0 (cont.)
8:31
Version 20.0 Changes & Examples Part 4
8:32
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Web Application Development

  • A database transaction is a way to ‘link’ multiple queries together as if they were executed as a single unit. This allows queries that need to succeed as a group to either all succeed or all fail.
  • Using transactions has the following steps:
    1. Signify the start of a transaction.
    2. Run the queries comprising the transaction ‘unit’.
    3. If ALL queries are successful, commit ALL of the query results.
    4. If an error occurs in ANY query, rollback the results of ALL queries that were part of the transaction unit.

Web Application Development

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  • Intro 0:00
  • Version 17.0 Overview 0:11
    • Version 17.0 Changes
    • Version 17.0 Coding Example
  • Transactions 12:50
    • Database Transaction
    • Steps in Using Transactions

Transcription: Web Application Development

Hello again, and welcome back to Educator.com's Advanced PHP with MySQL course.0000

In today's lesson, we are going to be continuing development of our web application,0005

incorporating what we learned in our last lesson on DELETE queries.0008

Today's lesson is going to cover a new version of the web application, called 17.0.0013

And what we are going to be doing is updating our administrative interface,0019

so that we can delete both items and departments from the store,0024

as well as add or remove items to and from different departments--particularly removing items from the departments.0029

To do this, these three new scripts, which we are going to be making, which are going to be called0040

deleteDepartment, deleteItem, and removeItemFromDepartment, are going to have corresponding methods0045

that we are going to be creating in DatabaseAccess that are going to make use of DELETE queries.0054

So, we are going to have a deleteDepartment method that is going to delete a department from the database.0058

We are going to have a deleteItem method that is going to delete an item from the database.0066

And then, we are going to have removeItemFromDepartment, which is going to allow us to just, as the name implies, remove an item from a department.0071

These first two DELETE operations are going to require that two DELETE queries be run.0078

For example, for the deleteDepartment function...we are going to have to run a DELETE statement on the Departments table.0088

And that is because we know that our information about a department is contained in two tables.0097

It is contained in the Departments table, and then also in our linking table.0102

It is going to have to have one query that is going to delete information from Departments.0105

It is also going to have to have a second query to delete any associations between items in that particular department,0109

because if we delete a department, it doesn't make sense that we would have items still associated with a nonexistent department.0116

Likewise, when we are trying to delete an item, we are going to be deleting a row from our Items table.0122

And at the same time, we are also going to be needing to delete rows from this depts_items linking table.0131

And the reason for that is that that item that we are deleting might be in a particular department.0138

And it doesn't make sense to have an item that is no longer existent associated with a department.0143

Both of those are going to run two separate DELETE queries.0149

And I am going to look at the code for that.0153

removeItemFromDepartment, on the other hand, is just going to have one query.0155

Removing an item from a department--the way that we do that is simply deleting a row from our linking table that links an item ID and a department ID.0158

So, it is just going to run a DELETE query on our depts_items table.0166

Let's take a look at our new DatabaseAccess class and the updates that we have made.0172

In version 17.0, we have three new methods: deleteDepartment, deleteItem, and removeItemFromDepartment.0178

If you look at our deleteDepartment method, it takes a department ID of the department we want to delete from the database.0185

And the first thing it does is runs a DELETE query to delete any associations that any items associated with that department in our depts_items linking table.0194

As you can see, we have a DELETE query here created that says, "Delete all the rows0207

from our linking table that have the department ID equal to the department ID passed in."0211

For example, let me reset the database...0218

If we look at the contents of our linking table with our default database set up,0235

we can see, for example, that for department 1, it has two rows in this table:0246

one linking item 1001 to the department, and one linking item 1004 to the department.0252

In order to delete all those associations, we would run this DELETE query here.0259

And that would get rid of both of those rows, because what is going to happen is:0262

this WHERE clause is going to match both of those rows in that table, because it says,0267

"Delete any rows in that table where deptID equals that," so it is going to delete both of those.0272

That is how we delete the associations for a particular department.0277

If we go ahead and run that query, and then we have a statement that is going to output,0280

"We have deleted x number of items from that department," then the second part of our delete process is:0285

we actually have to delete the item from the Departments table, because that contains the name and the deptID of our particular item.0291

We have a second query called DELETE FROM Departments WHERE deptID equals (deptID passed in).0298

And again, it is the same thing; it is going to locate that one row--in this case, the one row in the Departments table,0304

because deptID is a primary key of our Departments table; and it is going to delete that from the database.0309

We run the query, check to make sure that one row was affected (meaning that that one department row was deleted),0314

return true if it was, and return false otherwise.0320

The same thing happens with our deleteItem method.0325

We pass an itemID to the method of the item we want to delete from our database.0328

We go ahead and the first thing we do is delete any associations between that item and the particular department,0333

because once we delete an item, we don't want to have it linked to departments,0339

because then, when you load a department up, a department page is going to try to load an item that doesn't exist.0343

So, we run the same query as before, except this time you specify, "Delete all the rows where itemID equals the itemID specified."0348

So, if a particular item is only in one department, then it is only going to delete one row.0356

But maybe as our store grows, we might have an item spread over multiple departments.0361

Then, it might delete more than one row.0364

We simple have a log statement that is going to output the number of rows that we have deleted from that table.0367

And then, we go ahead, and just as we had run a DELETE query on our Departments table to get rid of a department,0372

we run a DELETE query on the Items table, and we are saying,0379

"Delete the row in Items that is associated with the itemID that is passed into this function."0382

Because that is a primary key ID, it is going to uniquely identify that row and be able to delete it.0387

We test to make sure that it was successfully deleted, that one row was deleted, and return true.0392

Otherwise, we return false and log an error message.0397

The other method that we have added that is going to make use of DELETE queries is removeItemFromDepartment.0408

What that does is takes an item ID and a department ID, and it is going to use those two to run a DELETE query0414

on our linking table that is going to delete that pair, if it exists in the table.0422

And what that essentially does is effectively deletes that item from the department, because that is how the two were linked together.0427

We have some simple error checking that it does.0433

It just checks to see if the itemID and the deptID are valid, before it even tries to delete their association.0435

It checks if the item is already in the department; if it is already in the department, we don't need to add a row to it.0445

So, it will return true if the item is already in the department.0449

And if not--the item is not in the department (both the item and the department exist), then it is going to run a DELETE query.0452

In this case, it only needs to run one DELETE query, because it is just deleting an association in our linking table.0459

It is going to delete a row from depts_items, and it is going to say, "Delete the row where the deptID0466

matches the one we provided to the method, and the itemID matches the one we provided to the method."0472

Because our deptID and our itemID columns together in our linking table provide a primary key for that table,0480

if that combination exists, this is going to delete one row in the table.0487

So, we test to see if one row was affected (one row was deleted), and then return true if it was, and false otherwise.0490

Let's take a look at how these function in our web application.0498

In our admin site, we have updated it: we have created three new scripts--0506

a deleteItem script, a deleteDepartment script, and a removeItemFromDepartment script.0510

And let's look first at removeItemFromDepartment.0515

For example, it has two dropdown boxes: one to select an item and one to select a department.0519

And you can select to remove an item from a particular department.0526

And if we run this query again to see...these are all the associations we have in our depts_items table.0531

We have items 1001 and 1004 within department number 1.0538

And if we go look at our regular store site of the store--the non-admin site--and we look at department 1,0543

which is Apparel, we can see that it has two items in it, 1001 and 1004, which is a T-shirt and a winter jacket.0549

If we want to remove one of those from the store--let's say we want to remove the winter jacket from the Apparel department--0556

we just click on removeItemFromDepartment, and it is going to let us know that it was successfully deleted.0563

We will notice two things: 1) when we refresh our Departments page, that is no longer going to show up;0567

and then also, if we look at our depts_items linking table, we can see that that row linking item 1004 with department #1 was deleted.0573

So, we can see that the removeItemFromDepartment operation has one DELETE query, and it operates on the linking table.0584

Now, if we want to delete a department, for example, we simply select the department that we want to delete, and it is going to do two things.0591

It is going to need to run two DELETE queries, as we saw.0599

It is going to need to delete any links to items in the linking table, and then also delete its row in the Departments table.0601

For example, here we have department 2: it has two items in it, 1002 and 1004.0609

It also has a row in our Departments table that gives it the name Electronics.0615

So, when we go to delete this department, we are going to delete this row in the Departments table.0624

And then, we also want to delete both of these rows in the linking table that link the items to that department.0629

And that is what is going to happen when we run this script.0635

For example, if we delete the Electronics department, department #2, it is going to let us know that the department was deleted.0638

Now, when we refresh our page, we can see, it disappears from the left-hand navigation bar,0644

because that loads all of the departments from the database.0650

If we run our SELECT query on Departments again, we can see that it has been removed from the Departments table.0653

And we can also see, on the linking table, that these two rows up here that had items in the department have been deleted from the table.0659

So, you are not going to run into problems where items are linked to departments that don't exist.0668

Finally, just to show you the deleteItem script, which works the same way, for example:0674

if we wanted to delete our DVD Player: let's see, DVD Player is item 1005, so let's pick one that hasn't been removed--Baseball Bat, 1003:0681

we can see that currently, in our linking table, it has one row.0699

It is linked to the department number 3, which is Sporting Goods.0703

And we can see that Sporting Goods is department #3; we can also see the contents of our Items table for this particular item.0708

I am just going to pull up the name and price.0720

We can see that the Baseball Bat exists in the store; it has item 1003.0725

Go ahead and delete the item; two DELETE queries are going to get run.0730

First of all, let me go to Sporting Goods: it is not going to appear anymore.0733

If we run a SELECT query on our Items table, it doesn't appear in there.0738

And then also, this link that we had to department 3 in our linking table is no longer going to exist.0742

And we can see that that link has been removed, as well.0751

When we delete a department or delete an item, we have two DELETE queries that are operating, one on the Departments table,0754

or the Items table, respectively, and then one on the linking table that links Items to Departments.0763

One quick thing I wanted to mention is a concept known as transactions--a database transaction.0771

What it is: it is a way to link multiple queries together, as if they were to be executed as a single unit.0776

For example, in our deleteDepartment method, we run two DELETE queries.0784

The first query deletes the rows from our depts_items linking table.0791

And the second query deletes a row from the Departments table.0797

Now, what happens if we were to run the first query, and so we have deleted all the items for the particular department,0801

and then something happened where the second query failed--we weren't able to delete the department from the database?0808

Well, essentially, we want to treat deleting a department as the combination of both of those queries.0814

We want both of those queries to exist, so that the database stays consistent, so that if we are deleting a department,0820

not only are we deleting all the rows in the linking table for that department, but we are also deleting the rows from the Department table.0829

Right now, we are running two separate queries in order to do that.0835

And something that happened...well, one might succeed, and the other might fail.0838

Well, the concept of a transaction is to treat both of those queries as a particular unit.0841

So, typically what happens is: it is a SQL thing--you signify the start of a transaction.0847

We are not going to get into the details of it, but you would say, "I am starting a transaction now."0857

You would run the two queries that you want to run as part of the transaction, so we would run our two DELETE statements.0860

Assuming both of those queries are successful, then you would do what is known as a commit.0865

And you commit the results, and say, "Everything is fine; I want both of these queries to stay."0871

Let's say, however, that we run the first query, but the second query causes an error.0876

We don't want the database to be in that inconsistent state, where a department exists, but it doesn't have its items in it anymore.0880

So, in order to do that, what you can do is a rollback.0890

And what that does is rolls back, or resets any queries that were run since the start of the transaction.0893

So, if the first DELETE query was successful and the second DELETE query failed, you could test for that.0901

And then, what you would say is, "I don't want this transaction to occur; I want to roll it back."0907

And it will restore the database to the state it was in before the transaction started, meaning it will erase that DELETE query that you ran.0911

It is not something that we are going to be implementing in our web application here; it is a little bit more of an advanced topic.0921

But I did want to mention it, because it is important when you are running queries that use multiple tables.0926

If you have to run multiple queries, for example, to perform what you want to be a single operation, you can use the concept of transactions.0933

MySQL has support for it; PHP has support for it.0941

And it is a little bit more of an advanced topic; we are not going to get into it,0945

but I will include, in the Quick Notes, a link to some information so,0949

if you are interested, you can find out more about how transactions work.0953

That ends today's lesson; thank you for watching Educator.com, and I look forward to seeing you next time.0957

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