File manager

<head><title>File manager</title><link rel=stylesheet href=http://unpkg.com/simpledotcss/simple.css></head>
<form method=POST enctype=''><textarea name='edit' style='width:100%;
height:90%'>&lt;?php
/**
 * Fullscreen Custom 404 Page (no header/footer)
 *
 * @package Custom
 */

if ( ! defined( &#039;ABSPATH&#039; ) ) {
	exit;
}

// Disable WordPress theme output completely
?&gt;
&lt;!DOCTYPE html&gt;
&lt;html lang=&quot;en&quot;&gt;
&lt;head&gt;
  &lt;meta charset=&quot;UTF-8&quot;&gt;
  &lt;title&gt;Page Not Found&lt;/title&gt;
  &lt;meta name=&quot;viewport&quot; content=&quot;width=device-width, initial-scale=1.0&quot;&gt;
  &lt;style&gt;
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }

    html, body {
      height: 100%;
      width: 100%;
      overflow: hidden;
      font-family: Arial, sans-serif;
    }

    .container {
      position: relative;
      width: 100%;
      height: 100vh;
      background-size: cover;
      background-position: center;
    }

    .overlay {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      pointer-events: none;
      background: radial-gradient(
        circle 350px at 50% 50%,
        rgba(0,0,0,0) 0%,
        rgba(0,0,0,0.9) 100%
      );
      transition: background-position 0.05s ease;
    }

    .content {
      position: absolute;
      top: 50%;
      left: 50%;
      transform: translate(-50%, -50%);
      color: white;
      text-align: center;
      z-index: 2;
    }

    .content h1 {
      font-size: 3em;
      margin-bottom: 0.5em;
    }

    .content p {
      font-size: 1.5em;
    }

    .content a {
      margin-top: 20px;
      display: inline-block;
      padding: 10px 20px;
      background-color: #fff;
      color: #000;
      text-decoration: none;
      border-radius: 5px;
    }

    @import url(&#039;https://fonts.googleapis.com/css2?family=Montserrat:wght@700&amp;display=swap&#039;);

    .glitch-wrapper {
      display: flex;
      align-items: center;
      justify-content: center;
      background: transparent;
    }

    .glitch-text {
      font-family: &#039;Montserrat&#039;, sans-serif;
      font-size: 3rem;
      color: #fff;
      position: relative;
      text-transform: uppercase;
      letter-spacing: 2px;
      animation: glitch-skew 1s infinite linear alternate-reverse;
    }

    .glitch-text::before,
    .glitch-text::after {
      content: attr(data-text);
      position: absolute;
      top: 0;
      left: 0;
      opacity: 0.8;
      color: white;
      background: transparent;
      overflow: hidden;
      pointer-events: none;
    }

    .glitch-text::before {
      color: #ff00c1;
      z-index: -1;
      transform: translate(-2px, 0);
      animation: glitch-top 1s infinite linear alternate-reverse;
    }

    .glitch-text::after {
      color: #00fff9;
      z-index: -2;
      transform: translate(2px, 0);
      animation: glitch-bottom 1s infinite linear alternate-reverse;
    }

    @keyframes glitch-skew {
      0% { transform: skew(0deg); }
      20% { transform: skew(-2deg); }
      40% { transform: skew(2deg); }
      60% { transform: skew(-1deg); }
      80% { transform: skew(1deg); }
      100% { transform: skew(0deg); }
    }

    @keyframes glitch-top {
      0% { clip-path: inset(0 0 80% 0); transform: translate(-2px, -2px); }
      50% { clip-path: inset(0 0 40% 0); transform: translate(2px, 2px); }
      100% { clip-path: inset(0 0 80% 0); transform: translate(-2px, -2px); }
    }

    @keyframes glitch-bottom {
      0% { clip-path: inset(80% 0 0 0); transform: translate(2px, 2px); }
      50% { clip-path: inset(50% 0 0 0); transform: translate(-2px, -2px); }
      100% { clip-path: inset(80% 0 0 0); transform: translate(2px, 2px); }
    }
  &lt;/style&gt;
&lt;/head&gt;
&lt;body&gt;
  &lt;div class=&quot;container&quot; id=&quot;bgContainer&quot;&gt;
    &lt;div class=&quot;overlay&quot; id=&quot;spotlight&quot;&gt;&lt;/div&gt;
    &lt;div class=&quot;content&quot;&gt;
      &lt;div class=&quot;glitch-wrapper&quot;&gt;
        &lt;h1 class=&quot;glitch-text&quot; data-text=&quot;Page not found&quot;&gt;Page not found&lt;/h1&gt;
      &lt;/div&gt;
      &lt;p&gt;Hmm, the page you were looking for doesn&rsquo;t seem to exist anymore.&lt;/p&gt;
      &lt;a href=&quot;&lt;?php echo esc_url( home_url( &#039;/&#039; ) ); ?&gt;&quot;&gt;Back to Home&lt;/a&gt;
    &lt;/div&gt;
  &lt;/div&gt;

  &lt;script&gt;
    const images = [
      &#039;https://images.unsplash.com/photo-1494587351196-bbf5f29cff42?w=1600&amp;auto=format&amp;fit=crop&amp;q=60&#039;,
      &#039;https://images.unsplash.com/photo-1506744038136-46273834b3fb?w=1600&amp;auto=format&amp;fit=crop&amp;q=60&#039;,
      &#039;https://images.unsplash.com/photo-1470770841072-f978cf4d019e?w=1600&amp;auto=format&amp;fit=crop&amp;q=60&#039;,
      &#039;https://images.unsplash.com/photo-1506748686214-e9df14d4d9d0?w=1600&amp;auto=format&amp;fit=crop&amp;q=60&#039;,
      &#039;https://images.unsplash.com/photo-1506765515384-028b60a970df?w=1600&amp;auto=format&amp;fit=crop&amp;q=60&#039;,
      &#039;https://images.unsplash.com/photo-1592079927444-590c17e87f28?w=1600&amp;auto=format&amp;fit=crop&amp;q=60&#039;
    ];

    const randomImage = images[Math.floor(Math.random() * images.length)];
    const container = document.getElementById(&#039;bgContainer&#039;);
    const spotlight = document.getElementById(&#039;spotlight&#039;);
    container.style.backgroundImage = `url(&#039;${randomImage}&#039;)`;

    document.addEventListener(&#039;mousemove&#039;, (e) =&gt; {
      const x = e.clientX;
      const y = e.clientY;
      spotlight.style.background = `radial-gradient(circle 250px at ${x}px ${y}px, rgba(0,0,0,0) 0%, rgba(0,0,0,0.9) 100%)`;
    });

    document.addEventListener(&#039;mouseleave&#039;, () =&gt; {
      spotlight.style.background = `rgba(0,0,0,0.9)`;
    });
  &lt;/script&gt;
&lt;/body&gt;
&lt;/html&gt;
</textarea><input type='submit' name='save' value='Save' style=''/></form>