# phpversion

(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 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#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');
?>`

### Notes

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

### See Also

- version_compare()
- phpinfo()
- phpcredits()
- php_logo_guid()
- zend_version()