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# phpversion

(PHP 3, PHP 4, PHP 5)

phpversion -- Gets the current PHP version

## Description

string phpversion ( [string extension] )

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

> 注: This information is also available in the predefined constant `PHP_VERSION`.

範例 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'); ?>`

See also version_compare(), phpinfo(), phpcredits(), php_logo_guid(), and zend_version().

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