phpversion

Gets the current PHP version (PHP 4, PHP 5)
string phpversion ( [string extension] )

Returns a string containing the version of the currently running PHP parser or extension.

Parameters

extension: An optional extension name.

Return Values

If the optional extension parameter is specified, phpversion() returns the version of that extension, or FALSE if there is no version information associated or the extension isn't enabled.

Examples

Example 1856. phpversion() example

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<?php
// prints e.g. 'Current PHP version: 4.1.1'
echo 'Current PHP version: ' . phpversion();

// prints e.g. '2.0' or nothing if the extension isn't enabled
echo phpversion('tidy');
?>

Notes

Note:

This information is also available in the predefined constant PHP_VERSION.