soderctf misc 2

gistfile1.txt

<?php
$flag = "SODERCTF[C0K_M7_K0L4Y_G3LcI_D3L1_Y1N3_1S_BaSINde_fanta_s3verim]";
function strigToBinary($string)
{
    $characters = str_split($string);

    $binary = [];
    foreach ($characters as $character) {
        $data = unpack('H*', $character);
        $binary[] = base_convert($data[1], 16, 2);
    }

    return implode(' ', $binary);
}
$ac = strigToBinary($flag);
$ac = strrev($ac);
$parca = explode(" ", $ac);

for ($i = 0; $i < count($parca); $i++) {
    $ne = $parca[$i];
    // amele styleee
    $degis = str_replace("00000000", "8", $ne);
    $degis = str_replace("0000000", "7", $degis);
    $degis = str_replace("000000", "6", $degis);
    $degis = str_replace("00000", "5", $degis);
    $degis = str_replace("0000", "4", $degis);
    $degis = str_replace("0000", "3", $degis);
    $degis = str_replace("00", "2", $degis);
    $degis = str_replace("0", "o", $degis);
    $parca[$i] = $degis;
}
print_r($parca);