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Wednesday, 9 March 2016

Introduction about PHP(comments,php files,syntax,echo and print)

PHP

PHP  is a hypertext preprocessor . It is widely used for Open sorce scripting languae. PHP scripts are executed on server. PHP is a server side scripting language that is embedded in HTML. It is  used to managed dynamic content and databases.

PHP Files

  •  PHP file contain HTML,CSS,JavaScript. PHP codes are executing on server & result is return to browser as HTML.

  • PHP file have extension .php.

  • PHP can generate dynamic content.

  • PHP can create Open,write,delete,close file on server. PHP can collect form data. PHP can add, delete, modify data in database.

  • PHP can run on various platform like windows, linux, mac. PHP supports wide range of database.

 Syntax of PHP:-                                                            

<?php   

-------

?>

To Print any value

ECHO and PRINT is used. Echo is widely used than Print because echo is very fast than Print,therefore Print is less used.

<?php                                                                                <?php

echo"Hello...";                                                                    print"Hello...";

?>                                                                                      ?>

Comments in PHP

Comments have a two types:-

  • Single line comment:-    (# is used for single line comments. )

  • Multi-line comment

                  /*

                     ----(for multi line comment)

                  */

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