字符串与16进制互转

PHP实现:

function str2hex($string)
 {
       $hex="";
       for($i=0;$i<strlen($string);$i++)
       $hex.=dechex(ord($string[$i]));
       //$hex=strtoupper($hex);
       return $hex;
 }
function hex2str($hex)
       $string="";
       for($i=0;$i<strlen($hex)-1;$i+=2)
       $string.=chr(hexdec($hex[$i].$hex[$i+1]));
       return $string;
 }

 

Python实现:

 

def hex2str(s):
    if s[:2] == '0x' or s[:2] == '0X':
        s = s[2:]
    res = ""
    for i in range(0,len(s),2):
        hex_dig = s[i:i+2]
        res+=(chr(int(hex_dig,base=16)))
    return res

def str2hex(string):
    res = ""
    for s in string:
        hex_dig = hex(ord(s))[2:]
        if len(hex_dig)==1:
            hex_dig = "0"+hex_dig
        res+=hex_dig
    return res