我来求个 PHP 32 位与 64 位 按位异或 操作的问题.....

<?php
function t_charCodeAt($str, $index){
    $char = mb_substr($str, $index, 1, 'UTF-8');
    if (mb_check_encoding($char, 'UTF-8')) {
        $ret = mb_convert_encoding($char, 'UTF-32BE', 'UTF-8');
        return hexdec(bin2hex($ret));
    } else {
        return null;
    }
}
function t_crc32($g){
    $g = urlencode($g);
    $e = array();
    for ($f = 0; $f < 256; $f++) {
        $c = $f;
        for ($d = 0; $d < 8; $d++) {
            $c = ($c & 1) ? (($c >> 1) & 2147483647) ^ 3988292384 : (($c >> 1) & 2147483647);
        }
        $e[$f] = $c;
    }
    for ($f = 0, $c = 4294967295; $f < strlen($g); $f++) {
        $c = (($c >> 8) & 16777215) ^ $e[($c & 255) ^ t_charCodeAt($g, $f)];
    }
    $c ^= 4294967295; // 32位和64位结果不一致，求解决办法！正确结果应该以32位为例！
    $prefix = (!is_numeric(substr($c >> 3, 0, 1))) ? substr($c >> 3, 0, 1) : '';
    echo $prefix.base_convert($c >> 3, 10, 16);   
}
t_crc32('1029409')."\n";
t_crc32('1549058');