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PHP code Syntax and Structure

3.PHP code Syntax and Structure

  • PHP code is interpreted by a web server with a PHP Preprocessor module which generates the resulting HTML.
  • The client browser only receives HTML.

Basic Structure:

  • PHP script always starts with <?php and ends with ?>.
  • PHP script can be placed anywhere in the document.
  • In some server you can use the above script as <? and ends with ?> but it does not support by all servers.
  • Normally PHP file contains HTML tags and PHP scripts.
  • PHP file must be stored in .php file extension
  • Each PHP code must end with semicolon(;)

Sample PHP coding


<html>

<head><title>Sample PHP</title></head>

<body>

<?php echo "I am learning PHP from s3learn.com"; ?>

</body>

</html>

Data Received by the Browser:


<html>

<head><title>Sample PHP</title></head>

<body>

I am learning PHP from s3learn.com

</body>

</html>

Comments in PHP

  • // for single line comments.
  • /* some text  block */ for comment block.

<html>
<body>

<?php
//This is single line comment

/*
This is multi line
comment block
*/
?>

</body>
</html>

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