(PHP 4, PHP 5, PHP 7, PHP 8)
phpversion — Gets the current PHP version
Returns a string containing the version of the currently running PHP parser or extension.
extension
An optional extension name.
Returns the current PHP version as a string.
If a string argument is provided for
extension
parameter, phpversion()
returns the version of that extension, or false
if there is no version
information associated or the extension isn't enabled.
Version | Description |
---|---|
8.0.0 |
extension is nullable now.
|
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 enabledecho phpversion('tidy');?>
Example #2 PHP_VERSION_ID
example and usage
<?php// PHP_VERSION_ID is available as of PHP 5.2.7, if our // version is lower than that, then emulate itif (!defined('PHP_VERSION_ID')) { $version = explode('.', PHP_VERSION); define('PHP_VERSION_ID', ($version[0] * 10000 + $version[1] * 100 + $version[2]));}// PHP_VERSION_ID is defined as a number, where the higher the number // is, the newer a PHP version is used. It's defined as used in the above // expression://// $version_id = $major_version * 10000 + $minor_version * 100 + $release_version;//// Now with PHP_VERSION_ID we can check for features this PHP version // may have, this doesn't require to use version_compare() everytime // you check if the current PHP version may not support a feature.//// For example, we may here define the PHP_VERSION_* constants thats // not available in versions prior to 5.2.7if (PHP_VERSION_ID < 50207) { define('PHP_MAJOR_VERSION', $version[0]); define('PHP_MINOR_VERSION', $version[1]); define('PHP_RELEASE_VERSION', $version[2]); // and so on, ...}?>
Note:
This information is also available in the predefined constant
PHP_VERSION
. More versioning information is available using thePHP_VERSION_*
constants.
Note:
Some extensions may define their own version number. However, most bundled extension will use the PHP version as their version number.