(PHP 4, PHP 5)
phpversion — Gets the current PHP version
Returns a string containing the version of the currently running PHP parser or extension.
An optional extension name.
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.
Пример #1 phpversion() example
<?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');
?>
Замечание: This information is also available in the predefined constant PHP_VERSION.