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PHP Tutorial

PHP 4 was officially released on May 22, 2002, and today its installed base has surpassed 15 million domains. In the late 1998, Zeev and Andi looked back at their work in PHP 3 and felt they could have written the scripting language even better and they started yet another rewrite. While PHP 3 still continuously parsed the scripts while executing them, PHP 4 came with a new paradigm of compile first, execute later. The compilation step does not compile PHP scripts into machine code; it instead compiles them into byte code, which is then executed by the Zend Engine (Zend stands for Zeev & Andi), the new heart of PHP 4. Because of this new way of executing scripts, the performance of PHP 4 was much better than that of PHP 3, with only a small amount of backward compatibility breakage 4. Among other improvements was an improved extension API for better run-time performance, a web server abstraction layer allowing PHP 4 to run on most popular web servers, and lots more.

 
     PHP TOPICS
Introduction
PHP is a language that was designed to be easily embedded into HTML pages. Most PHP pages have PHP code and HTML intermixed. When a Web server reads a PHP page...more »
Introduction
   
Variables
Variables in PHP are denoted by the "$". To assign the value "Hello World" to the variable $str, you simply call it in your code:...more »
Variables
   
Strings
String variables are used to store and manipulate a piece of text....more »
Strings
   
Operators
Operators are used to manipulate or perform operations on variables and values. There are many operators used in PHP, we have separated them into the follow...more »
Operators
   
If Else Statement
One of the most common PHP language constructs that you will encounter is the if…then statement. The if…then statement allows you to evaluate an ...more »
If Else Statement
   
Loops
Loops are used to repeat statement or block of statement more than one time. The idea of a loop is to do something over and over again until the task has be...more »
Loops
   
Functions
In addition to PHP's built-in functions, you can create your own functions. Remember that if you want to use variables that exist outside of the function, then...more »
Functions
   
Forms
Forms are the most fundamental method of interaction for your users. Users must use a form to enter information into a site. Think about it, every bulletin boa...more »
Forms
   
Sessions
You cannot track variables across a user session unless you start the session on each page on which you want to use or alter those variables. Starting a sessio...more »
Sessions
   
Cookies
A cookie is a small bit of information stored on a viewer's computer by his or her web browser by request from a web page. The information is constantly pas...more »
Cookies
   
Files
PHP is a very useful language for working with files. Although it may not be as robust as other languages, such as PERL, when it comes to parsing files, PHP st...more »
Files
   
E-mail
mail() function is used to send emails from inside a script in php. The Syntax of mail() function is as under....more »
E-mail
   
Error Handling
Error handling is the process of changing the control flow of a program in response to error conditions. Error conditions can be caused by a variety of fact...more »
Error Handling
   
File Upload
You must first build an HTML form that lets users select a file to upload. ...more »
File Upload
   
PHP Databases
A database is a collection of data that is stored independently of the manner in which you collect it or may wish to retrieve it.  It is organized for ...more »
PHP Databases
   
Connecting to a MySQL Database
In order to pull information from a MySQL database to your php pages, you need to connect to the database first. ...more »
Connecting to a MySQL Database
   
MySQL Data Types
Numeric Data Types:...more »
MySQL Data Types
   
Inserting Data Into a Table
The INSERT INTO SQL statement impregnates our table with data. Here is a general form of INSERT.INSERT I...more »
Inserting Data Into a Table
   
Select Statement
The select query is used to retrieve records from a database.   ...more »
Select Statement
   
Where Clause
In Select Query we use WHERE clause to select only data that matches a specified criteria.  ...more »
Where Clause
   
Order By
We use Order By Keyword to sort the records in a recordset. The general syntax is as under. Synt...more »
Order By
   
Update Statement
Update statement is used to modify the data in a database table. The general syntax is as under. ...more »
Update Statement
   
Delete From Statement
DELETE FROM statement is used to delete rows from a database table. The general syntax is as under....more »
Delete From Statement
   
 
PHP Tutorial
 
  Introduction
Introduction
  Variables
Variables
  Strings
Strings
  Operators
Operators
  If Else Statement
If Else Statement
  Loops
Loops
  Functions
Functions
  Forms
Forms
  Sessions
Sessions
  Cookies
Cookies
  Files
Files
  E-mail
E-mail
  Error Handling
Error Handling
  File Upload
File Upload
  PHP Databases
PHP Databases
  Connecting to a MySQL Database
Connecting to a MySQL Database
  MySQL Data Types
MySQL Data Types
  Inserting Data Into a Table
Inserting Data Into a Table
  Select Statement
Select Statement
  Where Clause
Where Clause
  Order By
Order By
  Update Statement
Update Statement
  Delete From Statement
Delete From Statement
 
 
 
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HTML Tutorial
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