PHP 字串轉字元陣列/字元陣列轉字串/字元陣列轉十六進制字串/十六進制字串轉字元陣列/十六進制字串轉一般字串 [PHP_String_util]

資料來源: https://gist.github.com/miguelmota/8f235b9dfd1ff1dda1d63c1df77a861e

GITHUB: https://github.com/jash-git/Jash-good-idea-20220201-001/tree/main/20220217%E8%B3%87%E6%96%99%E6%94%B6%E8%97%8F

include – 引用 函數庫/函示庫

unpack – 函數從二進製字符串對數據進行解包
    unpack(format,data)
        参数    描述
        format    必需。规定在解包数据时所使用的格式。
        data    可选。规定被解包的二进制数据。
        format 参数的可能值：
        a – NUL-padded string
        A – SPACE-padded string
        h – Hex string, low nibble first
        H – Hex string, high nibble first
        c – signed char
        C – unsigned char
        s – signed short (always 16 bit, machine byte order)
        S – unsigned short (always 16 bit, machine byte order)
        n – unsigned short (always 16 bit, big endian byte order)
        v – unsigned short (always 16 bit, little endian byte order)
        i – signed integer (machine dependent size and byte order)
        I – unsigned integer (machine dependent size and byte order)
        l – signed long (always 32 bit, machine byte order)
        L – unsigned long (always 32 bit, machine byte order)
        N – unsigned long (always 32 bit, big endian byte order)
        V – unsigned long (always 32 bit, little endian byte order)
        f – float (machine dependent size and representation)
        d – double (machine dependent size and representation)
        x – NUL byte
        X – Back up one byte
        @ – NUL-fill to absolute position
    
array_map – 將陣列依照函數規則進行運算

join – 將陣列組合為一個字符串

hex2bin – 將16進制數字字符串轉成一般字串

bin2hex – 將一般字串轉成16進制數字字符串

var_dump – 顯示變數型態和變數的所有數值

code

<?php

function string2ByteArray($string) {
  return unpack('C*', $string);
}

function byteArray2String($byteArray) {
  $chars = array_map("chr", $byteArray);
  return join($chars);
}

function byteArray2Hex($byteArray) {
  $chars = array_map("chr", $byteArray);
  $bin = join($chars);
  return bin2hex($bin);
}

function hex2ByteArray($hexString) {
  $string = hex2bin($hexString);
  return unpack('C*', $string);
}

function string2Hex($string) {
  return bin2hex($string);
}

function hex2String($hexString) {
  return hex2bin($hexString);
}

?>

<?php

include('./util.php');

$byteArray = unpack('C*', 'hello');
var_dump($byteArray);
echo "<br/>";

var_dump(string2ByteArray('hello'));
echo "<br/>";

var_dump(byteArray2String($byteArray));
echo "<br/>";

var_dump(byteArray2Hex($byteArray));
echo "<br/>";

var_dump(hex2ByteArray('68656c6c6f'));
echo "<br/>";

var_dump(string2Hex('hello'));
echo "<br/>";

var_dump(hex2String('68656c6c6f'));
echo "<br/>";

/*
array(5) { [1]=> int(104) [2]=> int(101) [3]=> int(108) [4]=> int(108) [5]=> int(111) }
array(5) { [1]=> int(104) [2]=> int(101) [3]=> int(108) [4]=> int(108) [5]=> int(111) }
string(5) "hello"
string(10) "68656c6c6f"
array(5) { [1]=> int(104) [2]=> int(101) [3]=> int(108) [4]=> int(108) [5]=> int(111) }
string(10) "68656c6c6f"
string(5) "hello"
*/
?>