字符串转 16 进制
public static function String2Hex($string){
$hex = '';
for ($i=0; $i<strlen($string); $i++){$ord = ord($string[$i]);
$hexCode = dechex($ord);
$hex .= substr('0'.$hexCode, -2);
}
return strToUpper($hex);
}
16 进制转字符串
public static function Hex2String($hex){
$string='';
for ($i=0; $i < strlen($hex)-1; $i+=2){$string .= chr(hexdec($hex[$i].$hex[$i+1]));
}
return $string;
}