Question 213005 in PHP Question posted in
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Php – How to split 8 byte string into 2 byte chunks

$hexValue = "11503B58";

I want to get output:

Seed0 = 0x11
Seed1 = 0x50
Seed2 = 0x3B
Seed3 = 0x58

Seed0 ~ Seed3 should be also Hex value (not string).

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2

Answers


  1. 0 
    $hexValue = 0x11503B58;

$result = array_map(
  'hexdec',
  array_filter(
    explode(
      "n",
      chunk_split(dechex($hexValue), 2)
    )
  )
);

print_r($result);

    Output:

    Array
(
    [0] => 17   // decimal equivalent of 0x11
    [1] => 80   // decimal equivalent of 0x50
    [2] => 59   // etc.
    [3] => 88   // 
)
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  2. 0

    A simple quick and dirty way is converting it to a string and then split it.

    You can convert a hex value into hex representation string.

    var_dump(dechex(0x11503B58));

    string(8) "11503b58"

    The internal representation is always decimal.

    var_dump(0x11503B58)

    int(290470744)

    $hexValue = '11503B58';
preg_match_all('/../', $hexValue, $matches);
[$seed0, $seed1, $seed2, $seed3] = array_map('hexdec', $matches[0]);
[$seeda, $seedb, $seedc, $seedd] = array_map(fn($v) => '0x' . strtoupper($v), $matches[0]);

echo $seed0, ' : ', $seeda, PHP_EOL;
echo $seed1, ' : ', $seedb, PHP_EOL;
echo $seed2, ' : ', $seedc, PHP_EOL;
echo $seed3, ' : ', $seedd, PHP_EOL;

    17 : 0x11
80 : 0x50
59 : 0x3B
88 : 0x58
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