phpversion

(PHP 4, PHP 5, PHP 7)

phpversionGets the current PHP version

Descrierea

string phpversion ([ string $extension ] )

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

Parametri

extension

An optional extension name.

Valorile întoarse

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.

Exemple

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');
?>

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 it
if (!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 5.2.7

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, ...
}
?>

Note

Notă:

This information is also available in the predefined constant PHP_VERSION. More versioning information is available using the PHP_VERSION_* constants.

A se vedea și

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User Contributed Notes 4 notes

up
73
cHao
4 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
}
?>
up
6
burninleo at gmx dot net
1 year ago
Note that the version string returned by phpversion() may include more information than expected: "5.5.9-1ubuntu4.17", for example.
up
15
pavankumar at tutorvista dot com
6 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/>';
}
?>
up
-4
php at stampy dot me
8 months ago
If you cast the output of phpversion() to a float, it will give you the major and minor version parts as a floating point number.

This will be less useful if the minor version number is 10 or above, but for lower version numbers it works nicely.

<?
$ver
= (float)phpversion();
if (
$ver > 7.0) {
   
//do something for php7.1 and above.
} elseif ($ver === 7.0) {
   
//do something for php7.0
} else {
   
//do something for php5.6 or lower.
}
?>
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