PHP: phpversion - Manual
(PHP 4, PHP 5, PHP 7, PHP 8)
phpversion — Gets the current PHP version
Description
Parameters
extension-
An optional extension name.
Return Values
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.
Changelog
| Version | Description |
|---|---|
| 8.0.0 |
extension is nullable now.
|
Examples
Example #1 phpversion() example
<?php// Prints e.g. 'Current PHP version: 8.3.12'
echo 'Current PHP version: ' . phpversion();// Prints e.g. '1.22.3' or nothing if the extension isn't enabled
echo phpversion('zip');?>
Example #2 PHP_VERSION_ID example and usage
<?php/**
* 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 5.2.7
*/if (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, ...
}?>
Notes
Note:
This information is also available in the predefined constant
PHP_VERSION. More versioning information is available using thePHP_*_VERSIONconstants.
Note:
Some extensions may define their own version number. However, most bundled extension will use the PHP version as their version number.
See Also
- PHP_VERSION constants
- version_compare() - Compares two "PHP-standardized" version number strings
- phpinfo() - Outputs information about PHP's configuration
- phpcredits() - Prints out the credits for PHP
- zend_version() - Gets the version of the current Zend engine
Found A Problem?
12 years ago
If you're trying to check whether the version of PHP you're running on is sufficient, don't screw around with `strcasecmp` etc. PHP already has a `version_compare` function, and it's specifically made to compare PHP-style version strings.
<?php
if (version_compare(phpversion(), '5.3.10', '<')) {
// php version isn't high enough
}
?>9 years ago
Note that the version string returned by phpversion() may include more information than expected: "5.5.9-1ubuntu4.17", for example.pavankumar at tutorvista dot com ¶
15 years ago
To know, what are the {php} extensions loaded & version of extensions :
<?php
foreach (get_loaded_extensions() as $i => $ext)
{
echo $ext .' => '. phpversion($ext). '<br/>';
}
?>