PHP Introduction

PHP is a server-side scripting language.

What You Should Already Know
Before you continue you should have a basic understanding of the [...]

PHP Installation

Apache friends Xampp
Download xampp and install all at once!

What do you Need?
If your server supports PHP you don’t [...]

PHP Syntax

PHP code is executed on the server, and the plain HTML result is sent to the [...]

PHP Variables

A variable is used to store information.

Variables in PHP
Variables are used for storing a values, like text strings, numbers [...]

PHP String Variables

A string variable is used to store and manipulate text.

String Variables in PHP
String variables are used for values that contains [...]

PHP Operators

Operators are used to operate on values.

PHP Operators
This section lists the different operators used in PHP.
Arithmetic Operators

Operator
Description
Example
Result

+
Addition
x=2
[...]

PHP If…Else Statements

Conditional statements are used to perform different actions based on different conditions.

Conditional Statements
Very often when you write code, [...]

PHP Switch Statement

Conditional statements are used to perform different actions based on different conditions.

The PHP Switch Statement
Use the switch statement [...]

PHP Arrays

An array stores multiple values in one single variable.

What is an Array?
A variable is a storage area holding a number [...]

PHP Looping – While Loops

Loops execute a block of code a specified number of times, or while a specified condition is true.

PHP [...]

PHP Looping – For Loops

Loops execute a block of code a specified number of times, or while a specified condition [...]

PHP Functions

The real power of PHP comes from its functions.
In PHP, there are more than 700 built-in functions.

PHP Functions
In this chapter [...]

PHP Forms and User Input

The PHP $_GET and $_POST variables are used to retrieve information from forms, like user input.

PHP Form Handling
The [...]

PHP $_GET Function

The built-in $_GET function is used to collect values in a form with method="get".

The $_GET Function
The [...]

PHP $_POST Function

The built-in $_POST function is used to collect values in a form with method="post".

The $_POST Function
The [...]

PHP Date() Function

The PHP date() function is used to format a time and/or date.

The PHP Date() Function
The PHP date() function [...]

PHP Include File

Server Side Includes (SSI)
You can insert the content of one PHP file into another PHP file before the [...]

PHP File Handling

The fopen() function is used to open files in PHP.

Opening a File
The fopen() function is used to open files in [...]

PHP File Upload

With PHP, it is possible to upload files to the server.

Create an Upload-File Form
To allow users to upload files from [...]

PHP Cookies

A cookie is often used to identify a user.

What is a Cookie?
A cookie is often used to identify a [...]

PHP Sessions

A PHP session variable is used to store information about, or change settings for a user [...]

PHP Sending E-mails

PHP allows you to send e-mails directly from a script.

The PHP mail() Function
The PHP mail() function is used to send [...]

PHP Secure E-mails

There is a weakness in the PHP e-mail script in the previous chapter.

PHP E-mail Injections
First, look [...]

PHP Error Handling

The default error handling in PHP is very simple. An error message with file name, line [...]

PHP Exception Handling

Exceptions are used to change the normal flow of a script if a specified error occurs

What [...]

PHP Filter

PHP filters are used to validate and filter data coming from insecure sources, like user input.

What [...]

PHP MySQL Introduction

MySQL is the most popular open-source database system.

What is MySQL?
MySQL is a database.
The data in MySQL is stored in database [...]

PHP MySQL Create Database and Tables

A database holds one or multiple tables.

Create a Database
The CREATE DATABASE statement is used to create a database in MySQL.
Syntax

[...]

PHP MySQL Insert Into

The INSERT INTO statement is used to insert new records in a table.

Insert Data Into a Database Table
The [...]

PHP MySQL Select

The SELECT statement is used to select data from a database.

Select Data From a Database Table
The SELECT statement [...]

PHP MySQL Order By Keyword

The ORDER BY keyword is used to sort the data in a recordset.

The ORDER BY Keyword
The ORDER BY [...]

PHP MySQL Update

The UPDATE statement is used to modify data in a table.

Update Data In a Database
The UPDATE statement is used to [...]

PHP MySQL Delete

The DELETE statement is used to delete records in a table.

Delete Data In a Database
The DELETE FROM statement [...]

PHP Database ODBC

ODBC is an Application Programming Interface (API) that allows you to connect to a data source (e.g. an [...]

PHP XML Expat Parser

The built-in Expat parser makes it possible to process XML documents in PHP.

What is XML?
XML is [...]

PHP XML DOM

The built-in DOM parser makes it possible to process XML documents in PHP.

What is DOM?
The W3C [...]

PHP SimpleXML

SimpleXML handles the most common XML tasks and leaves the rest for other extensions.

What is SimpleXML?
SimpleXML [...]

AJAX Introduction

AJAX = Asynchronous JavaScript and XML
AJAX is not a new programming language, but a new technique for creating [...]

AJAX XMLHttpRequest

The keystone of AJAX is the XMLHttpRequest object.

AJAX uses the XMLHttpRequest object
To get or send information from/to a database or [...]

PHP Example – AJAX Suggest

AJAX can be used to create more interactive applications.

AJAX Suggest example
The following AJAX example will demonstrate how a [...]

PHP Example – AJAX and XML

AJAX can be used for interactive communication with an XML file.

AJAX XML example
The following example will [...]

PHP Example – AJAX and MySQL

AJAX can be used for interactive communication with a database.

AJAX database example
The following example will demonstrate how a [...]

PHP Example – responseXML

responseText returns the HTTP response as a string.
responseXML returns the response as XML.

AJAX ResponseXML example
The ResponseXML property returns an XML [...]

PHP Example – AJAX Live Search

AJAX can be used for a more user-friendly and interactive search.

AJAX Live Search
In this example we [...]

PHP Example – AJAX RSS Reader

An RSS Reader is used to read RSS Feeds.

AJAX RSS Reader
In this example we will demonstrate an RSS reader, where [...]

PHP Example – AJAX Poll

AJAX Poll
This example will demonstrate a poll where a web page can get results without reloading.

Do you like [...]

What is PHP?

Hypertext Preprocessor (the name is a recursive acronym) is a widely used, general-purpose scripting language that was originally designed for [...]