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PHP tutorial | ptutorial
This document introduces PHP by explaining what it is, why it is used, its basic syntax, and how to work with variables, comments, and echo statements in PHP. PHP is a server-side scripting language used for web development that runs on web servers. It allows for dynamic web page creation and easy embedding of PHP code into HTML. PHP code is executed on the server, and it can communicate with databases and generate secure web pages.
PHP tutorial | ptutorial
- 1. Introduction of PHP ByUmar Farooque Khan http://www.ptutorial.com
- 3. What is PHP? •PHP stand for hypertext pre-processor. # PHP is a general purpose server side scripting language that is basically used for web development. # PHP script run on web server. # PHP is used for dynamic web page creation. # PHP run on GUI based operating system as well as Command based . #PHP can easily embedded with HTML. #Its freely available. http://www.ptutorial.com 3
- 4. Why PHP? It’s fast It’s free It’s easy to use It’s versatile It’s secure It’s customizable Interact with HTML forms Communicate with databases Generate secure Web pages Easy to learn and implement. http://www.ptutorial.com 4
- 5. Supported Databases dBASE Informix Ingres Microsoft SQL Server mSQL MySQL Oracle PostgreSQL Sybase http://www.ptutorial.com 5
- 6. Basic Syntax <html> <head> <title>First Scriptof PHP</title> </head> <body> <?php echo “Welcome to the php word!"; echo “www.ptutorial.com”; ?> </body> </html> http://www.ptutorial.com 6
- 7. Commenting in PHP •PHP supports two type of commenting 1. Single line comment <?php echo “Comment in php"; // Single line Comment #this also a single line comment echo “www.ptutorial.com"; ?> http://www.ptutorial.com 7
- 8. Commenting continued inPHP 2. Multi line Comment <?php echo “Comment in php“; echo “Multiple line comment"; /* this multi line comment You can put any number of line */ echo “www.ptutorial.com"; ?> http://www.ptutorial.com 8
- 9. Echo Statement • InPHP echo statement is used for deliver the string as well as variable value on the browse, Following example explain the concept of echo statement. <?php echo “Welcome to the php word!"; $number=38; echo $number; $str=“www.ptutorial.com”; Echo $str; ?> http://www.ptutorial.com 9
- 10. The Semicolon andCase Sensitivity Every statement must be terminated with semicolon. In PHP functions, classes, core language keywords are case- insensitive. <?php echo “Welcome to the php word!"; Echo “www.ptutorial.com”; //case insensitive ?> http://www.ptutorial.com 10
- 11. PHP Variables Variables arejust identifier that are used for storing data, like integer, float, strings, arrays. In PHP there is no need to declare before use. Dollar sign is used at the time of making variable. http://www.ptutorial.com 11
- 12. Rules of makingPHP variable It must be starts with dollar($) sign. A valid variable name start with string or underscore after dollar sign. PHP variable can any length. PHP variables are case sensitive. http://www.ptutorial.com 12
- 13. Example of validvariable $name=52; $name_1=12; $var145af=102; $_php=586; $a145=“java”; $first_name_1=4875; http://www.ptutorial.com 13
- 14. Example of PHPVariable <?php $txt=“www.ptutorial.com!"; $Number=152; $a=18.5; Echo $number . $a; ?> http://www.ptutorial.com 14