Difference between revisions of "PHP code island"

Revision as of 20:49, 20 September 2016

In PHP, a code island (or code block) contains PHP code.

Code island markers

A code island consists of a open marker and a close marker, like this:

<?php

?>

Or it could be expressed on a single line, like this:

<?php ?>

Using code islands

All of your PHP code must be inside a code island. PHP code only functions as PHP code when it appears inside a code island.

PHP code islands must not include HTML, CSS or JavaScript; using these languages inside a code island will trigger a PHP error.

A PHP file commonly contains a mix of PHP code and HTML. The file might contain multiple code islands, divided by blocks of HTML.

Or, the PHP file might contain only PHP code, without any HTML.

Example

The example below shows a PHP code island inside a paragraph element:

<p>
<?php
  echo "Hello World";
?>
</p>

The above code sample is a mix of HTML (a paragraph tag), and a PHP code island (which will display "Hello World" for the user, inside the paragraph.

The echo keyword generates the text Hello World (the text inside the quotation marks -- not the quotes themselves).

See also

• PHP
• PHP code
• PHP text generation
• Web forms and PHP

External links