อยากอ่านค่าintรหัส ascii code ให้ได้เกิน 127 เพื่อจะนำค่าไปคำนวณต่อ

function ordutf8($string, &$offset) {
    $code = ord(substr($string, $offset,1));
    if ($code >= 128) {        //otherwise 0xxxxxxx
        if ($code < 224) $bytesnumber = 2;                //110xxxxx
        else if ($code < 240) $bytesnumber = 3;        //1110xxxx
        else if ($code < 248) $bytesnumber = 4;    //11110xxx
        $codetemp = $code - 192 - ($bytesnumber > 2 ? 32 : 0) - ($bytesnumber > 3 ? 16 : 0);
        for ($i = 2; $i <= $bytesnumber; $i++) {
            $offset ++;
            $code2 = ord(substr($string, $offset, 1)) - 128;        //10xxxxxx
            $codetemp = $codetemp*64 + $code2;
        }
        $code = $codetemp;
    }
    $offset += 1;
    if ($offset >= strlen($string)) $offset = -1;
    return $code;
}

$offset = 0;
echo ordutf8('Æ', $offset);// 198

$string = '¬ell³D³rld';
$stringlength = mb_strlen($string);
var_dump($stringlength);// ได้ 10 ตัวอักษร ถูกต้อง

for ($i = 0; $i < $stringlength; $i++) {
    $eachChar = mb_substr($string, $i, 1);
    echo $eachChar;
    echo ' = ' . mb_ord($eachChar);
    echo '<br>';
}

$string = '¬ell³D³rld';
$stringlength = mb_strlen($string);
var_dump($stringlength);// 10

for ($i = 0; $i < $stringlength; $i++) {
    $eachChar = mb_substr($string, $i, 1);
    echo $eachChar;
    $charNum = mb_ord($eachChar);
    echo ' = ' . $charNum ;
    echo ' =&gt; ' . mb_chr($charNum);
    echo '<br>';
}