[ PHP | lib ] quite a hash function

secure_hash.php

<?
// put this to  libs file
function make_hash( $pass, $salt, $email, $linear=false ) {

    $numb = "";
    foreach( str_split($salt) as $char ) if( is_numeric( $char )) $numb .= $char;

    mt_srand( (int)$numb );
    $algs = array('whirlpool', 'sha512', 'sha384', 'ripemd320', 'snefru256', 'gost', 'snefru', 'ripemd256', 'sha256', 'sha224');

    // check if all algorithms are available
    foreach($algs as $hash) if(!in_array($hash,hash_algos())) throw new Exception("Unsupported algorithms.");

    $hash = $pass;
    foreach( str_split($salt) as $i => $char ) {

        $str = $hash . $char;

        if( $i%3 == 0 ) $str .= $email;
        if( $i%7 == 0 ) $str .= mt_rand( $hash );

        $hash = ( $linear ) ?
            hash( $algs[ $i%count($algs) ], $str, false ) :
            make_hash( $hash, $salt, $email, true );
    }

    return ( $linear ) ? $hash : sha1($hash);
}

// usage:
$hash = make_hash("userFunnyPassword","randomlyGeneratedAndSavedSalt_TheLongerTheBetter","[email protected]");
?>