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@ 2021-03-09T20:06:08Z

<?php

    $str1 = 'foobar';
    $str2 = 'stack';

    // your code
    $len = strlen($str1);
    $str = pack('V', $len) . $str1 . $str2;

    // unpacking
    $length_of_packed_string = strlen($str) - strlen($str1 . $str2);
    $unpacked = unpack('V', substr($str, 0, $length_of_packed_string));

    print_r($unpacked);

Output
Performance
VLD
References
Branches

substr: documentation ( source)
print_r: documentation ( source)
pack: documentation ( source)
unpack: documentation ( source)

preferences:dark modelive previewkey bindings

35.57 ms | 407 KiB | 5 Q