phpinfo
putenv
PHP Options/Info Функции
PHP Manual

# phpversion

(PHP 4, PHP 5)

phpversion — Gets the current PHP version

### Описание

string phpversion ([ string `$extension` ] )

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

### Список параметров

`extension`

  An optional extension name.

### Возвращаемые значения

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.

### Примеры

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');
?>`

### Примечания

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

### Смотрите также

- version_compare() - Compares two "PHP-standardized" version number strings
- phpinfo() - Outputs lots of PHP information
- phpcredits() - Prints out the credits for PHP
- php_logo_guid() - Gets the logo guid
- zend_version() - Gets the version of the current Zend engine

phpinfo
putenv
PHP Options/Info Функции
PHP Manual