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;}