The version_compare Function

The version_compare function compares two strings containing version numbers, and returns the comparison result. It takes three parameters: two version strings and an optional comparison operator. Returns -1, 0, or 1 if the first version is less than, equal to, or greater than the second, respectively.

Syntax

version_compare(string $version1, string $version2, string $operator = null);

Example

Compare two versions:

<?php
	$res = version_compare('1.2.3', '1.2.4');
	echo $res;
?>

Code execution result:

-1

Example

Check if the version meets the minimum requirements:

<?php
	if (version_compare(PHP_VERSION, '8.0.0', '>=')) {
		echo 'PHP version is suitable';
	} else {
		echo 'PHP 8.0.0 or higher is required';
	}
?>

Code execution result (example):

'PHP version is suitable'

Example

Compare versions with alpha and beta releases:

<?php
	$res = version_compare('1.0.0b', '1.0.0a');
	echo $res;
?>

Code execution result:

1

The version_compare Function

Syntax

Example

Example

Example

See Also