PHP internal hashCode Function

Question

I am looking for the PHP equelent to JAVA\'s

 \"SomeString\".hashCode();

function. The hashCode i am looking for should be the same which is u

Answer 1

a utf-8 version with emoji support

function str_hashcode($s){
    $hash = 0;
    $len = mb_strlen($s, 'UTF-8');
    if($len == 0 )
        return $hash;
    for ($i = 0; $i < $len; $i++) {
        $c = mb_substr($s, $i, 1, 'UTF-8');
        $cc = unpack('V', iconv('UTF-8', 'UCS-4LE', $c))[1];
        $hash = (($hash << 5) - $hash) + $cc;
        $hash &= $hash; // 16bit > 32bit
    }
    return $hash;
}