<?php
$latest_3_0_release = "5.7.6.0";
$latest_CVS = 		"5.7.6.1_CVS";
$versions = array(
    "2.0.3.2",
    "2.0.4.0",
    "2.0.4.2",
    "2.0.6.0",
    "2.0.7.0",
    "2.0.8.0",
    "2.0.8.2",
    "2.0.8.4",
    "2.1.0.0",
    "2.1.0.2",
    "2.1.0.4",
    "2.2.0.0",
    "2.2.0.2",
    "2.3.0.0",
    "2.3.0.2",
    "2.3.0.4",
    "2.3.0.6",
    "2.4.0.0",
    "2.4.0.2",
    "2.5.0.0",
    "2.5.0.2",
    "2.5.0.4",
    "3.0.0.8",
    "3.0.1.2",
    "3.0.1.4",
    "3.0.1.6",
    "3.0.2.0",
    "3.0.2.2",
    "3.0.3.0",
    "3.0.3.4",
    "3.0.4.0",
    "3.0.4.2",
    "3.0.5.0",
    "3.0.5.2",
    "3.1.0.0",
    "3.1.1.0",
    "4.0.0.0",
    "4.0.0.2",
    "4.0.0.4",
    "4.1.0.0",
    "4.1.0.2",
    "4.1.0.4",
    "4.2.0.0",
    "4.2.0.2",
    "4.2.0.4",
    "4.2.0.6",
    "4.2.0.8",
    "4.3.0.0",
    "4.3.0.2",
    "4.3.0.4",
    "4.3.0.6",
    "4.3.1.0",
    "4.3.1.2",
    "4.3.1.4",
    "4.4.0.0",
    "4.4.0.2",
    "4.4.0.4",
    "4.4.0.6",
    "4.5.0.0",
    "4.5.0.2",
    "4.5.0.4",
    "4.5.1.0",
    "4.6.0.0",
    "4.6.0.2",
    "4.6.0.4",
    "4.7.0.0",
    "4.7.0.2",
    "4.7.1.0",
    "4.7.1.2",
    "4.7.2.0",
    "4.8.0.0",
    "4.9.0.0",
    "5.0.0.0",
    "5.1.0.0",
    "5.2.0.0",
	"5.3.0.0",
	"5.4.0.0",
	"5.5.0.0",
	"5.6.0.0",
	"5.6.1.0",
	"5.6.1.2",
	"5.6.2.0",
    "5.7.0.0",
    "5.7.1.0",
    "5.7.2.0",
    "5.7.3.0",
    "5.7.4.0",
    "5.7.5.0",
    "5.7.6.0",
    $latest_CVS
);

/**
 * compare two version strings of form n.n.n.n (e.g. 1.2.3.4)
 * @param version_1
 * @param version_2
 * @return < 0 = AZ Lower, 0 = same, > 0 = AZ higher
 */
function compareVersions($version1,$version2){

		// CVS is bleeding edge, more recent than any _Bnn versions. _B99 is max so treat as _B99 for compare
		// I'd prefer to use B100 but the crappy code below doesn't actually work... someone should fix this sometime
		
	$version1 = str_replace( "_CVS", "_B99", $version1 );
	$version2 = str_replace( "_CVS", "_B99", $version2 );

    $version1 = preg_replace("[^0-9.]", ".", $version1);
    $version2 = preg_replace("[^0-9.]", ".", $version2);

    for ($j=0;$j<min(strlen($version1), strlen($version2));$j++){

        $v1_c	= ord(substr($version1, $j, $j + 1));
        $v2_c	= ord(substr($version2, $j, $j + 1));

        if ( $v1_c == $v2_c )
                continue;

        if ( $v2_c == ord('.') ){
                        // version1 higher (e.g. 10.2 -vs- 1.2)
                return( +1 );
        }else if ( $v1_c == ord('.') ){
                        // version2 higher ( e.g. 1.2 -vs- 10.2 )
                return( -1 );
        }else{
                return( $v1_c - $v2_c );
        }
    }

    // longest one wins. e.g. 1.2.1 -vs- 1.2
    return strlen($version1) - strlen($version2);
}
?>