PHP Convert int to HEX

Question

How can I get a similar function with pack/unpack (or other short function)?

function getHEX($number) {
    switch($number) {
        case 0: $ret = "\x00\x00\x00\x00"; break;
        case 1: $ret = "\x00\x00\x00\x01"; break;
        case 2: $ret = "\x00\x00\x00\x02"; break;
        case 3: $ret = "\x00\x00\x00\x03"; break;
        // (...)

        default: $ret = "\x00\x00\x00\x00";
    }

    return $ret;
}

possible duplicate of stackoverflow.com/questions/5629386/… — bountyh
– bountyh, Commented Mar 13, 2014 at 8:50

Tom Fenech · Accepted Answer · 2014-03-13 08:54:19Z

5

You could do it with dechex in PHP:

<?php
echo dechex(10) . "\n";
echo dechex(47);
?>

edited Mar 13, 2014 at 8:54

Tom Fenech

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answered Mar 13, 2014 at 8:49

Nambi

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1 Comment

wandam Over a year ago

I tried this but the return value must be 4 bytes. When $ number is 1 calls me only 1 Byte

Stefan Pintilie · Accepted Answer · 2019-08-22 14:19:32Z

5

Here is a hint:

str_pad(dechex($number), 4, "0", STR_PAD_LEFT)

answered Aug 22, 2019 at 14:19

Stefan Pintilie

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Comments

wandam · Accepted Answer · 2014-03-13 09:31:38Z

4

This function has solved my problem

pack("H*", sprintf("%08X", $number));

answered Mar 13, 2014 at 9:31

wandam

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1 Comment

qpaycm Over a year ago

echo chr($number);

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