phpversion

(PHP 4, PHP 5)

phpversion — Gets the current PHP version

说明

string phpversion ([ string $extension ] )

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

参数

extension: An optional extension name.

返回值

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.

范例

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');
?>

注释

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

参见

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