a simple 2 version compare function in php

compare-versions.php

<?php


 function versionCompare($v1, $v2) {
	# This will split both the versions by '.' 
    $v1parts = explode(".", $v1);
    $v2parts = explode(".", $v2);

    # converts to integer from string 
    $v1parts = array_map(intval, $v1parts);
    $v2parts = array_map(intval, $v2parts);

	# compares which list is bigger and fills 
	# smaller list with zero (for unequal delimeters) 
	if (count($v1parts) > count($v2parts))
        for ($i=0; $i < count($v1parts); $i++)
            $v2parts.append(0);
    elseif (count($v1parts) < count($v2parts))
        for ($i=0; $i < count($v2parts); $i++)
            $v1parts.append(0);

    # returns 1 if version 1 is bigger and -1 if 
	# version 2 is bigger and 0 if equal 
    for ($i=0; $i < count($v1parts); $i++) {
	    if ($v1parts[$i] > $v2parts[$i])
            return 1;
        elseif ($v2parts[$i] > $v1parts[$i])
            return -1;
    }
    return 0;
}

# Driver program to check above comparison function 
$version1 = "1.11.3";
$version2 = "1.50.7";

$ans = versionCompare($version1, $version2);
if ($ans < 0)
	print ($version1 . " is smaller");
elseif ($ans > 0)
	print( $version2 . " is smaller");
else 
	print("Both versions are equal");


?>