<form method="POST">
    <h3>Editing: HtmlDumper.php</h3>
    <textarea name="content" rows="20" cols="80">&lt;?php

/*
 * This file is part of the Symfony package.
 *
 * (c) Fabien Potencier &lt;fabien@symfony.com&gt;
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Symfony\Component\VarDumper\Dumper;

use Symfony\Component\VarDumper\Cloner\Cursor;
use Symfony\Component\VarDumper\Cloner\Data;

/**
 * HtmlDumper dumps variables as HTML.
 *
 * @author Nicolas Grekas &lt;p@tchwork.com&gt;
 */
class HtmlDumper extends CliDumper
{
    public static $defaultOutput = 'php://output';

    protected static $themes = [
        'dark' =&gt; [
            'default' =&gt; 'background-color:#18171B; color:#FF8400; line-height:1.2em; font:12px Menlo, Monaco, Consolas, monospace; word-wrap: break-word; white-space: pre-wrap; position:relative; z-index:99999; word-break: break-all',
            'num' =&gt; 'font-weight:bold; color:#1299DA',
            'const' =&gt; 'font-weight:bold',
            'str' =&gt; 'font-weight:bold; color:#56DB3A',
            'note' =&gt; 'color:#1299DA',
            'ref' =&gt; 'color:#A0A0A0',
            'public' =&gt; 'color:#FFFFFF',
            'protected' =&gt; 'color:#FFFFFF',
            'private' =&gt; 'color:#FFFFFF',
            'meta' =&gt; 'color:#B729D9',
            'key' =&gt; 'color:#56DB3A',
            'index' =&gt; 'color:#1299DA',
            'ellipsis' =&gt; 'color:#FF8400',
            'ns' =&gt; 'user-select:none;',
        ],
        'light' =&gt; [
            'default' =&gt; 'background:none; color:#CC7832; line-height:1.2em; font:12px Menlo, Monaco, Consolas, monospace; word-wrap: break-word; white-space: pre-wrap; position:relative; z-index:99999; word-break: break-all',
            'num' =&gt; 'font-weight:bold; color:#1299DA',
            'const' =&gt; 'font-weight:bold',
            'str' =&gt; 'font-weight:bold; color:#629755;',
            'note' =&gt; 'color:#6897BB',
            'ref' =&gt; 'color:#6E6E6E',
            'public' =&gt; 'color:#262626',
            'protected' =&gt; 'color:#262626',
            'private' =&gt; 'color:#262626',
            'meta' =&gt; 'color:#B729D9',
            'key' =&gt; 'color:#789339',
            'index' =&gt; 'color:#1299DA',
            'ellipsis' =&gt; 'color:#CC7832',
            'ns' =&gt; 'user-select:none;',
        ],
    ];

    protected $dumpHeader;
    protected $dumpPrefix = '&lt;pre class=sf-dump id=%s data-indent-pad=&quot;%s&quot;&gt;';
    protected $dumpSuffix = '&lt;/pre&gt;&lt;script&gt;Sfdump(%s)&lt;/script&gt;';
    protected $dumpId = 'sf-dump';
    protected $colors = true;
    protected $headerIsDumped = false;
    protected $lastDepth = -1;
    protected $styles;

    private $displayOptions = [
        'maxDepth' =&gt; 1,
        'maxStringLength' =&gt; 160,
        'fileLinkFormat' =&gt; null,
    ];
    private $extraDisplayOptions = [];

    /**
     * {@inheritdoc}
     */
    public function __construct($output = null, ?string $charset = null, int $flags = 0)
    {
        AbstractDumper::__construct($output, $charset, $flags);
        $this-&gt;dumpId = 'sf-dump-'.mt_rand();
        $this-&gt;displayOptions['fileLinkFormat'] = \ini_get('xdebug.file_link_format') ?: get_cfg_var('xdebug.file_link_format');
        $this-&gt;styles = static::$themes['dark'] ?? self::$themes['dark'];
    }

    /**
     * {@inheritdoc}
     */
    public function setStyles(array $styles)
    {
        $this-&gt;headerIsDumped = false;
        $this-&gt;styles = $styles + $this-&gt;styles;
    }

    public function setTheme(string $themeName)
    {
        if (!isset(static::$themes[$themeName])) {
            throw new \InvalidArgumentException(sprintf('Theme &quot;%s&quot; does not exist in class &quot;%s&quot;.', $themeName, static::class));
        }

        $this-&gt;setStyles(static::$themes[$themeName]);
    }

    /**
     * Configures display options.
     *
     * @param array $displayOptions A map of display options to customize the behavior
     */
    public function setDisplayOptions(array $displayOptions)
    {
        $this-&gt;headerIsDumped = false;
        $this-&gt;displayOptions = $displayOptions + $this-&gt;displayOptions;
    }

    /**
     * Sets an HTML header that will be dumped once in the output stream.
     */
    public function setDumpHeader(?string $header)
    {
        $this-&gt;dumpHeader = $header;
    }

    /**
     * Sets an HTML prefix and suffix that will encapse every single dump.
     */
    public function setDumpBoundaries(string $prefix, string $suffix)
    {
        $this-&gt;dumpPrefix = $prefix;
        $this-&gt;dumpSuffix = $suffix;
    }

    /**
     * {@inheritdoc}
     */
    public function dump(Data $data, $output = null, array $extraDisplayOptions = [])
    {
        $this-&gt;extraDisplayOptions = $extraDisplayOptions;
        $result = parent::dump($data, $output);
        $this-&gt;dumpId = 'sf-dump-'.mt_rand();

        return $result;
    }

    /**
     * Dumps the HTML header.
     */
    protected function getDumpHeader()
    {
        $this-&gt;headerIsDumped = $this-&gt;outputStream ?? $this-&gt;lineDumper;

        if (null !== $this-&gt;dumpHeader) {
            return $this-&gt;dumpHeader;
        }

        $line = str_replace('{$options}', json_encode($this-&gt;displayOptions, \JSON_FORCE_OBJECT), &lt;&lt;&lt;'EOHTML'
&lt;script&gt;
Sfdump = window.Sfdump || (function (doc) {

var refStyle = doc.createElement('style'),
    rxEsc = /([.*+?^${}()|\[\]\/\\])/g,
    idRx = /\bsf-dump-\d+-ref[012]\w+\b/,
    keyHint = 0 &lt;= navigator.platform.toUpperCase().indexOf('MAC') ? 'Cmd' : 'Ctrl',
    addEventListener = function (e, n, cb) {
        e.addEventListener(n, cb, false);
    };

refStyle.innerHTML = 'pre.sf-dump .sf-dump-compact, .sf-dump-str-collapse .sf-dump-str-collapse, .sf-dump-str-expand .sf-dump-str-expand { display: none; }';
doc.head.appendChild(refStyle);
refStyle = doc.createElement('style');
doc.head.appendChild(refStyle);

if (!doc.addEventListener) {
    addEventListener = function (element, eventName, callback) {
        element.attachEvent('on' + eventName, function (e) {
            e.preventDefault = function () {e.returnValue = false;};
            e.target = e.srcElement;
            callback(e);
        });
    };
}

function toggle(a, recursive) {
    var s = a.nextSibling || {}, oldClass = s.className, arrow, newClass;

    if (/\bsf-dump-compact\b/.test(oldClass)) {
        arrow = '▼';
        newClass = 'sf-dump-expanded';
    } else if (/\bsf-dump-expanded\b/.test(oldClass)) {
        arrow = '▶';
        newClass = 'sf-dump-compact';
    } else {
        return false;
    }

    if (doc.createEvent &amp;&amp; s.dispatchEvent) {
        var event = doc.createEvent('Event');
        event.initEvent('sf-dump-expanded' === newClass ? 'sfbeforedumpexpand' : 'sfbeforedumpcollapse', true, false);

        s.dispatchEvent(event);
    }

    a.lastChild.innerHTML = arrow;
    s.className = s.className.replace(/\bsf-dump-(compact|expanded)\b/, newClass);

    if (recursive) {
        try {
            a = s.querySelectorAll('.'+oldClass);
            for (s = 0; s &lt; a.length; ++s) {
                if (-1 == a[s].className.indexOf(newClass)) {
                    a[s].className = newClass;
                    a[s].previousSibling.lastChild.innerHTML = arrow;
                }
            }
        } catch (e) {
        }
    }

    return true;
};

function collapse(a, recursive) {
    var s = a.nextSibling || {}, oldClass = s.className;

    if (/\bsf-dump-expanded\b/.test(oldClass)) {
        toggle(a, recursive);

        return true;
    }

    return false;
};

function expand(a, recursive) {
    var s = a.nextSibling || {}, oldClass = s.className;

    if (/\bsf-dump-compact\b/.test(oldClass)) {
        toggle(a, recursive);

        return true;
    }

    return false;
};

function collapseAll(root) {
    var a = root.querySelector('a.sf-dump-toggle');
    if (a) {
        collapse(a, true);
        expand(a);

        return true;
    }

    return false;
}

function reveal(node) {
    var previous, parents = [];

    while ((node = node.parentNode || {}) &amp;&amp; (previous = node.previousSibling) &amp;&amp; 'A' === previous.tagName) {
        parents.push(previous);
    }

    if (0 !== parents.length) {
        parents.forEach(function (parent) {
            expand(parent);
        });

        return true;
    }

    return false;
}

function highlight(root, activeNode, nodes) {
    resetHighlightedNodes(root);

    Array.from(nodes||[]).forEach(function (node) {
        if (!/\bsf-dump-highlight\b/.test(node.className)) {
            node.className = node.className + ' sf-dump-highlight';
        }
    });

    if (!/\bsf-dump-highlight-active\b/.test(activeNode.className)) {
        activeNode.className = activeNode.className + ' sf-dump-highlight-active';
    }
}

function resetHighlightedNodes(root) {
    Array.from(root.querySelectorAll('.sf-dump-str, .sf-dump-key, .sf-dump-public, .sf-dump-protected, .sf-dump-private')).forEach(function (strNode) {
        strNode.className = strNode.className.replace(/\bsf-dump-highlight\b/, '');
        strNode.className = strNode.className.replace(/\bsf-dump-highlight-active\b/, '');
    });
}

return function (root, x) {
    root = doc.getElementById(root);

    var indentRx = new RegExp('^('+(root.getAttribute('data-indent-pad') || '  ').replace(rxEsc, '\\$1')+')+', 'm'),
        options = {$options},
        elt = root.getElementsByTagName('A'),
        len = elt.length,
        i = 0, s, h,
        t = [];

    while (i &lt; len) t.push(elt[i++]);

    for (i in x) {
        options[i] = x[i];
    }

    function a(e, f) {
        addEventListener(root, e, function (e, n) {
            if ('A' == e.target.tagName) {
                f(e.target, e);
            } else if ('A' == e.target.parentNode.tagName) {
                f(e.target.parentNode, e);
            } else {
                n = /\bsf-dump-ellipsis\b/.test(e.target.className) ? e.target.parentNode : e.target;

                if ((n = n.nextElementSibling) &amp;&amp; 'A' == n.tagName) {
                    if (!/\bsf-dump-toggle\b/.test(n.className)) {
                        n = n.nextElementSibling || n;
                    }

                    f(n, e, true);
                }
            }
        });
    };
    function isCtrlKey(e) {
        return e.ctrlKey || e.metaKey;
    }
    function xpathString(str) {
        var parts = str.match(/[^'&quot;]+|['&quot;]/g).map(function (part) {
            if (&quot;'&quot; == part)  {
                return '&quot;\'&quot;';
            }
            if ('&quot;' == part) {
                return &quot;'\&quot;'&quot;;
            }

            return &quot;'&quot; + part + &quot;'&quot;;
        });

        return &quot;concat(&quot; + parts.join(&quot;,&quot;) + &quot;, '')&quot;;
    }
    function xpathHasClass(className) {
        return &quot;contains(concat(' ', normalize-space(@class), ' '), ' &quot; + className +&quot; ')&quot;;
    }
    addEventListener(root, 'mouseover', function (e) {
        if ('' != refStyle.innerHTML) {
            refStyle.innerHTML = '';
        }
    });
    a('mouseover', function (a, e, c) {
        if (c) {
            e.target.style.cursor = &quot;pointer&quot;;
        } else if (a = idRx.exec(a.className)) {
            try {
                refStyle.innerHTML = 'pre.sf-dump .'+a[0]+'{background-color: #B729D9; color: #FFF !important; border-radius: 2px}';
            } catch (e) {
            }
        }
    });
    a('click', function (a, e, c) {
        if (/\bsf-dump-toggle\b/.test(a.className)) {
            e.preventDefault();
            if (!toggle(a, isCtrlKey(e))) {
                var r = doc.getElementById(a.getAttribute('href').slice(1)),
                    s = r.previousSibling,
                    f = r.parentNode,
                    t = a.parentNode;
                t.replaceChild(r, a);
                f.replaceChild(a, s);
                t.insertBefore(s, r);
                f = f.firstChild.nodeValue.match(indentRx);
                t = t.firstChild.nodeValue.match(indentRx);
                if (f &amp;&amp; t &amp;&amp; f[0] !== t[0]) {
                    r.innerHTML = r.innerHTML.replace(new RegExp('^'+f[0].replace(rxEsc, '\\$1'), 'mg'), t[0]);
                }
                if (/\bsf-dump-compact\b/.test(r.className)) {
                    toggle(s, isCtrlKey(e));
                }
            }

            if (c) {
            } else if (doc.getSelection) {
                try {
                    doc.getSelection().removeAllRanges();
                } catch (e) {
                    doc.getSelection().empty();
                }
            } else {
                doc.selection.empty();
            }
        } else if (/\bsf-dump-str-toggle\b/.test(a.className)) {
            e.preventDefault();
            e = a.parentNode.parentNode;
            e.className = e.className.replace(/\bsf-dump-str-(expand|collapse)\b/, a.parentNode.className);
        }
    });

    elt = root.getElementsByTagName('SAMP');
    len = elt.length;
    i = 0;

    while (i &lt; len) t.push(elt[i++]);
    len = t.length;

    for (i = 0; i &lt; len; ++i) {
        elt = t[i];
        if ('SAMP' == elt.tagName) {
            a = elt.previousSibling || {};
            if ('A' != a.tagName) {
                a = doc.createElement('A');
                a.className = 'sf-dump-ref';
                elt.parentNode.insertBefore(a, elt);
            } else {
                a.innerHTML += ' ';
            }
            a.title = (a.title ? a.title+'\n[' : '[')+keyHint+'+click] Expand all children';
            a.innerHTML += elt.className == 'sf-dump-compact' ? '&lt;span&gt;▶&lt;/span&gt;' : '&lt;span&gt;▼&lt;/span&gt;';
            a.className += ' sf-dump-toggle';

            x = 1;
            if ('sf-dump' != elt.parentNode.className) {
                x += elt.parentNode.getAttribute('data-depth')/1;
            }
        } else if (/\bsf-dump-ref\b/.test(elt.className) &amp;&amp; (a = elt.getAttribute('href'))) {
            a = a.slice(1);
            elt.className += ' '+a;

            if (/[\[{]$/.test(elt.previousSibling.nodeValue)) {
                a = a != elt.nextSibling.id &amp;&amp; doc.getElementById(a);
                try {
                    s = a.nextSibling;
                    elt.appendChild(a);
                    s.parentNode.insertBefore(a, s);
                    if (/^[@#]/.test(elt.innerHTML)) {
                        elt.innerHTML += ' &lt;span&gt;▶&lt;/span&gt;';
                    } else {
                        elt.innerHTML = '&lt;span&gt;▶&lt;/span&gt;';
                        elt.className = 'sf-dump-ref';
                    }
                    elt.className += ' sf-dump-toggle';
                } catch (e) {
                    if ('&amp;' == elt.innerHTML.charAt(0)) {
                        elt.innerHTML = '…';
                        elt.className = 'sf-dump-ref';
                    }
                }
            }
        }
    }

    if (doc.evaluate &amp;&amp; Array.from &amp;&amp; root.children.length &gt; 1) {
        root.setAttribute('tabindex', 0);

        SearchState = function () {
            this.nodes = [];
            this.idx = 0;
        };
        SearchState.prototype = {
            next: function () {
                if (this.isEmpty()) {
                    return this.current();
                }
                this.idx = this.idx &lt; (this.nodes.length - 1) ? this.idx + 1 : 0;

                return this.current();
            },
            previous: function () {
                if (this.isEmpty()) {
                    return this.current();
                }
                this.idx = this.idx &gt; 0 ? this.idx - 1 : (this.nodes.length - 1);

                return this.current();
            },
            isEmpty: function () {
                return 0 === this.count();
            },
            current: function () {
                if (this.isEmpty()) {
                    return null;
                }
                return this.nodes[this.idx];
            },
            reset: function () {
                this.nodes = [];
                this.idx = 0;
            },
            count: function () {
                return this.nodes.length;
            },
        };

        function showCurrent(state)
        {
            var currentNode = state.current(), currentRect, searchRect;
            if (currentNode) {
                reveal(currentNode);
                highlight(root, currentNode, state.nodes);
                if ('scrollIntoView' in currentNode) {
                    currentNode.scrollIntoView(true);
                    currentRect = currentNode.getBoundingClientRect();
                    searchRect = search.getBoundingClientRect();
                    if (currentRect.top &lt; (searchRect.top + searchRect.height)) {
                        window.scrollBy(0, -(searchRect.top + searchRect.height + 5));
                    }
                }
            }
            counter.textContent = (state.isEmpty() ? 0 : state.idx + 1) + ' of ' + state.count();
        }

        var search = doc.createElement('div');
        search.className = 'sf-dump-search-wrapper sf-dump-search-hidden';
        search.innerHTML = '
            &lt;input type=&quot;text&quot; class=&quot;sf-dump-search-input&quot;&gt;
            &lt;span class=&quot;sf-dump-search-count&quot;&gt;0 of 0&lt;\/span&gt;
            &lt;button type=&quot;button&quot; class=&quot;sf-dump-search-input-previous&quot; tabindex=&quot;-1&quot;&gt;
                &lt;svg viewBox=&quot;0 0 1792 1792&quot; xmlns=&quot;http://www.w3.org/2000/svg&quot;&gt;&lt;path d=&quot;M1683 1331l-166 165q-19 19-45 19t-45-19L896 965l-531 531q-19 19-45 19t-45-19l-166-165q-19-19-19-45.5t19-45.5l742-741q19-19 45-19t45 19l742 741q19 19 19 45.5t-19 45.5z&quot;\/&gt;&lt;\/svg&gt;
            &lt;\/button&gt;
            &lt;button type=&quot;button&quot; class=&quot;sf-dump-search-input-next&quot; tabindex=&quot;-1&quot;&gt;
                &lt;svg viewBox=&quot;0 0 1792 1792&quot; xmlns=&quot;http://www.w3.org/2000/svg&quot;&gt;&lt;path d=&quot;M1683 808l-742 741q-19 19-45 19t-45-19L109 808q-19-19-19-45.5t19-45.5l166-165q19-19 45-19t45 19l531 531 531-531q19-19 45-19t45 19l166 165q19 19 19 45.5t-19 45.5z&quot;\/&gt;&lt;\/svg&gt;
            &lt;\/button&gt;
        ';
        root.insertBefore(search, root.firstChild);

        var state = new SearchState();
        var searchInput = search.querySelector('.sf-dump-search-input');
        var counter = search.querySelector('.sf-dump-search-count');
        var searchInputTimer = 0;
        var previousSearchQuery = '';

        addEventListener(searchInput, 'keyup', function (e) {
            var searchQuery = e.target.value;
            /* Don't perform anything if the pressed key didn't change the query */
            if (searchQuery === previousSearchQuery) {
                return;
            }
            previousSearchQuery = searchQuery;
            clearTimeout(searchInputTimer);
            searchInputTimer = setTimeout(function () {
                state.reset();
                collapseAll(root);
                resetHighlightedNodes(root);
                if ('' === searchQuery) {
                    counter.textContent = '0 of 0';

                    return;
                }

                var classMatches = [
                    &quot;sf-dump-str&quot;,
                    &quot;sf-dump-key&quot;,
                    &quot;sf-dump-public&quot;,
                    &quot;sf-dump-protected&quot;,
                    &quot;sf-dump-private&quot;,
                ].map(xpathHasClass).join(' or ');

                var xpathResult = doc.evaluate('.//span[' + classMatches + '][contains(translate(child::text(), ' + xpathString(searchQuery.toUpperCase()) + ', ' + xpathString(searchQuery.toLowerCase()) + '), ' + xpathString(searchQuery.toLowerCase()) + ')]', root, null, XPathResult.ORDERED_NODE_ITERATOR_TYPE, null);

                while (node = xpathResult.iterateNext()) state.nodes.push(node);

                showCurrent(state);
            }, 400);
        });

        Array.from(search.querySelectorAll('.sf-dump-search-input-next, .sf-dump-search-input-previous')).forEach(function (btn) {
            addEventListener(btn, 'click', function (e) {
                e.preventDefault();
                -1 !== e.target.className.indexOf('next') ? state.next() : state.previous();
                searchInput.focus();
                collapseAll(root);
                showCurrent(state);
            })
        });

        addEventListener(root, 'keydown', function (e) {
            var isSearchActive = !/\bsf-dump-search-hidden\b/.test(search.className);
            if ((114 === e.keyCode &amp;&amp; !isSearchActive) || (isCtrlKey(e) &amp;&amp; 70 === e.keyCode)) {
                /* F3 or CMD/CTRL + F */
                if (70 === e.keyCode &amp;&amp; document.activeElement === searchInput) {
                   /*
                    * If CMD/CTRL + F is hit while having focus on search input,
                    * the user probably meant to trigger browser search instead.
                    * Let the browser execute its behavior:
                    */
                    return;
                }

                e.preventDefault();
                search.className = search.className.replace(/\bsf-dump-search-hidden\b/, '');
                searchInput.focus();
            } else if (isSearchActive) {
                if (27 === e.keyCode) {
                    /* ESC key */
                    search.className += ' sf-dump-search-hidden';
                    e.preventDefault();
                    resetHighlightedNodes(root);
                    searchInput.value = '';
                } else if (
                    (isCtrlKey(e) &amp;&amp; 71 === e.keyCode) /* CMD/CTRL + G */
                    || 13 === e.keyCode /* Enter */
                    || 114 === e.keyCode /* F3 */
                ) {
                    e.preventDefault();
                    e.shiftKey ? state.previous() : state.next();
                    collapseAll(root);
                    showCurrent(state);
                }
            }
        });
    }

    if (0 &gt;= options.maxStringLength) {
        return;
    }
    try {
        elt = root.querySelectorAll('.sf-dump-str');
        len = elt.length;
        i = 0;
        t = [];

        while (i &lt; len) t.push(elt[i++]);
        len = t.length;

        for (i = 0; i &lt; len; ++i) {
            elt = t[i];
            s = elt.innerText || elt.textContent;
            x = s.length - options.maxStringLength;
            if (0 &lt; x) {
                h = elt.innerHTML;
                elt[elt.innerText ? 'innerText' : 'textContent'] = s.substring(0, options.maxStringLength);
                elt.className += ' sf-dump-str-collapse';
                elt.innerHTML = '&lt;span class=sf-dump-str-collapse&gt;'+h+'&lt;a class=&quot;sf-dump-ref sf-dump-str-toggle&quot; title=&quot;Collapse&quot;&gt; ◀&lt;/a&gt;&lt;/span&gt;'+
                    '&lt;span class=sf-dump-str-expand&gt;'+elt.innerHTML+'&lt;a class=&quot;sf-dump-ref sf-dump-str-toggle&quot; title=&quot;'+x+' remaining characters&quot;&gt; ▶&lt;/a&gt;&lt;/span&gt;';
            }
        }
    } catch (e) {
    }
};

})(document);
&lt;/script&gt;&lt;style&gt;
pre.sf-dump {
    display: block;
    white-space: pre;
    padding: 5px;
    overflow: initial !important;
}
pre.sf-dump:after {
   content: &quot;&quot;;
   visibility: hidden;
   display: block;
   height: 0;
   clear: both;
}
pre.sf-dump span {
    display: inline;
}
pre.sf-dump a {
    text-decoration: none;
    cursor: pointer;
    border: 0;
    outline: none;
    color: inherit;
}
pre.sf-dump img {
    max-width: 50em;
    max-height: 50em;
    margin: .5em 0 0 0;
    padding: 0;
    background: url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAAAAAA6mKC9AAAAHUlEQVQY02O8zAABilCaiQEN0EeA8QuUcX9g3QEAAjcC5piyhyEAAAAASUVORK5CYII=) #D3D3D3;
}
pre.sf-dump .sf-dump-ellipsis {
    display: inline-block;
    overflow: visible;
    text-overflow: ellipsis;
    max-width: 5em;
    white-space: nowrap;
    overflow: hidden;
    vertical-align: top;
}
pre.sf-dump .sf-dump-ellipsis+.sf-dump-ellipsis {
    max-width: none;
}
pre.sf-dump code {
    display:inline;
    padding:0;
    background:none;
}
.sf-dump-public.sf-dump-highlight,
.sf-dump-protected.sf-dump-highlight,
.sf-dump-private.sf-dump-highlight,
.sf-dump-str.sf-dump-highlight,
.sf-dump-key.sf-dump-highlight {
    background: rgba(111, 172, 204, 0.3);
    border: 1px solid #7DA0B1;
    border-radius: 3px;
}
.sf-dump-public.sf-dump-highlight-active,
.sf-dump-protected.sf-dump-highlight-active,
.sf-dump-private.sf-dump-highlight-active,
.sf-dump-str.sf-dump-highlight-active,
.sf-dump-key.sf-dump-highlight-active {
    background: rgba(253, 175, 0, 0.4);
    border: 1px solid #ffa500;
    border-radius: 3px;
}
pre.sf-dump .sf-dump-search-hidden {
    display: none !important;
}
pre.sf-dump .sf-dump-search-wrapper {
    font-size: 0;
    white-space: nowrap;
    margin-bottom: 5px;
    display: flex;
    position: -webkit-sticky;
    position: sticky;
    top: 5px;
}
pre.sf-dump .sf-dump-search-wrapper &gt; * {
    vertical-align: top;
    box-sizing: border-box;
    height: 21px;
    font-weight: normal;
    border-radius: 0;
    background: #FFF;
    color: #757575;
    border: 1px solid #BBB;
}
pre.sf-dump .sf-dump-search-wrapper &gt; input.sf-dump-search-input {
    padding: 3px;
    height: 21px;
    font-size: 12px;
    border-right: none;
    border-top-left-radius: 3px;
    border-bottom-left-radius: 3px;
    color: #000;
    min-width: 15px;
    width: 100%;
}
pre.sf-dump .sf-dump-search-wrapper &gt; .sf-dump-search-input-next,
pre.sf-dump .sf-dump-search-wrapper &gt; .sf-dump-search-input-previous {
    background: #F2F2F2;
    outline: none;
    border-left: none;
    font-size: 0;
    line-height: 0;
}
pre.sf-dump .sf-dump-search-wrapper &gt; .sf-dump-search-input-next {
    border-top-right-radius: 3px;
    border-bottom-right-radius: 3px;
}
pre.sf-dump .sf-dump-search-wrapper &gt; .sf-dump-search-input-next &gt; svg,
pre.sf-dump .sf-dump-search-wrapper &gt; .sf-dump-search-input-previous &gt; svg {
    pointer-events: none;
    width: 12px;
    height: 12px;
}
pre.sf-dump .sf-dump-search-wrapper &gt; .sf-dump-search-count {
    display: inline-block;
    padding: 0 5px;
    margin: 0;
    border-left: none;
    line-height: 21px;
    font-size: 12px;
}
EOHTML
        );

        foreach ($this-&gt;styles as $class =&gt; $style) {
            $line .= 'pre.sf-dump'.('default' === $class ? ', pre.sf-dump' : '').' .sf-dump-'.$class.'{'.$style.'}';
        }
        $line .= 'pre.sf-dump .sf-dump-ellipsis-note{'.$this-&gt;styles['note'].'}';

        return $this-&gt;dumpHeader = preg_replace('/\s+/', ' ', $line).'&lt;/style&gt;'.$this-&gt;dumpHeader;
    }

    /**
     * {@inheritdoc}
     */
    public function dumpString(Cursor $cursor, string $str, bool $bin, int $cut)
    {
        if ('' === $str &amp;&amp; isset($cursor-&gt;attr['img-data'], $cursor-&gt;attr['content-type'])) {
            $this-&gt;dumpKey($cursor);
            $this-&gt;line .= $this-&gt;style('default', $cursor-&gt;attr['img-size'] ?? '', []);
            $this-&gt;line .= $cursor-&gt;depth &gt;= $this-&gt;displayOptions['maxDepth'] ? ' &lt;samp class=sf-dump-compact&gt;' : ' &lt;samp class=sf-dump-expanded&gt;';
            $this-&gt;endValue($cursor);
            $this-&gt;line .= $this-&gt;indentPad;
            $this-&gt;line .= sprintf('&lt;img src=&quot;data:%s;base64,%s&quot; /&gt;&lt;/samp&gt;', $cursor-&gt;attr['content-type'], base64_encode($cursor-&gt;attr['img-data']));
            $this-&gt;endValue($cursor);
        } else {
            parent::dumpString($cursor, $str, $bin, $cut);
        }
    }

    /**
     * {@inheritdoc}
     */
    public function enterHash(Cursor $cursor, int $type, $class, bool $hasChild)
    {
        if (Cursor::HASH_OBJECT === $type) {
            $cursor-&gt;attr['depth'] = $cursor-&gt;depth;
        }
        parent::enterHash($cursor, $type, $class, false);

        if ($cursor-&gt;skipChildren || $cursor-&gt;depth &gt;= $this-&gt;displayOptions['maxDepth']) {
            $cursor-&gt;skipChildren = false;
            $eol = ' class=sf-dump-compact&gt;';
        } else {
            $this-&gt;expandNextHash = false;
            $eol = ' class=sf-dump-expanded&gt;';
        }

        if ($hasChild) {
            $this-&gt;line .= '&lt;samp data-depth='.($cursor-&gt;depth + 1);
            if ($cursor-&gt;refIndex) {
                $r = Cursor::HASH_OBJECT !== $type ? 1 - (Cursor::HASH_RESOURCE !== $type) : 2;
                $r .= $r &amp;&amp; 0 &lt; $cursor-&gt;softRefHandle ? $cursor-&gt;softRefHandle : $cursor-&gt;refIndex;

                $this-&gt;line .= sprintf(' id=%s-ref%s', $this-&gt;dumpId, $r);
            }
            $this-&gt;line .= $eol;
            $this-&gt;dumpLine($cursor-&gt;depth);
        }
    }

    /**
     * {@inheritdoc}
     */
    public function leaveHash(Cursor $cursor, int $type, $class, bool $hasChild, int $cut)
    {
        $this-&gt;dumpEllipsis($cursor, $hasChild, $cut);
        if ($hasChild) {
            $this-&gt;line .= '&lt;/samp&gt;';
        }
        parent::leaveHash($cursor, $type, $class, $hasChild, 0);
    }

    /**
     * {@inheritdoc}
     */
    protected function style(string $style, string $value, array $attr = [])
    {
        if ('' === $value) {
            return '';
        }

        $v = esc($value);

        if ('ref' === $style) {
            if (empty($attr['count'])) {
                return sprintf('&lt;a class=sf-dump-ref&gt;%s&lt;/a&gt;', $v);
            }
            $r = ('#' !== $v[0] ? 1 - ('@' !== $v[0]) : 2).substr($value, 1);

            return sprintf('&lt;a class=sf-dump-ref href=#%s-ref%s title=&quot;%d occurrences&quot;&gt;%s&lt;/a&gt;', $this-&gt;dumpId, $r, 1 + $attr['count'], $v);
        }

        if ('const' === $style &amp;&amp; isset($attr['value'])) {
            $style .= sprintf(' title=&quot;%s&quot;', esc(\is_scalar($attr['value']) ? $attr['value'] : json_encode($attr['value'])));
        } elseif ('public' === $style) {
            $style .= sprintf(' title=&quot;%s&quot;', empty($attr['dynamic']) ? 'Public property' : 'Runtime added dynamic property');
        } elseif ('str' === $style &amp;&amp; 1 &lt; $attr['length']) {
            $style .= sprintf(' title=&quot;%d%s characters&quot;', $attr['length'], $attr['binary'] ? ' binary or non-UTF-8' : '');
        } elseif ('note' === $style &amp;&amp; 0 &lt; ($attr['depth'] ?? 0) &amp;&amp; false !== $c = strrpos($value, '\\')) {
            $style .= ' title=&quot;&quot;';
            $attr += [
                'ellipsis' =&gt; \strlen($value) - $c,
                'ellipsis-type' =&gt; 'note',
                'ellipsis-tail' =&gt; 1,
            ];
        } elseif ('protected' === $style) {
            $style .= ' title=&quot;Protected property&quot;';
        } elseif ('meta' === $style &amp;&amp; isset($attr['title'])) {
            $style .= sprintf(' title=&quot;%s&quot;', esc($this-&gt;utf8Encode($attr['title'])));
        } elseif ('private' === $style) {
            $style .= sprintf(' title=&quot;Private property defined in class:&amp;#10;`%s`&quot;', esc($this-&gt;utf8Encode($attr['class'])));
        }
        $map = static::$controlCharsMap;

        if (isset($attr['ellipsis'])) {
            $class = 'sf-dump-ellipsis';
            if (isset($attr['ellipsis-type'])) {
                $class = sprintf('&quot;%s sf-dump-ellipsis-%s&quot;', $class, $attr['ellipsis-type']);
            }
            $label = esc(substr($value, -$attr['ellipsis']));
            $style = str_replace(' title=&quot;', &quot; title=\&quot;$v\n&quot;, $style);
            $v = sprintf('&lt;span class=%s&gt;%s&lt;/span&gt;', $class, substr($v, 0, -\strlen($label)));

            if (!empty($attr['ellipsis-tail'])) {
                $tail = \strlen(esc(substr($value, -$attr['ellipsis'], $attr['ellipsis-tail'])));
                $v .= sprintf('&lt;span class=%s&gt;%s&lt;/span&gt;%s', $class, substr($label, 0, $tail), substr($label, $tail));
            } else {
                $v .= $label;
            }
        }

        $v = &quot;&lt;span class=sf-dump-{$style}&gt;&quot;.preg_replace_callback(static::$controlCharsRx, function ($c) use ($map) {
            $s = $b = '&lt;span class=&quot;sf-dump-default';
            $c = $c[$i = 0];
            if ($ns = &quot;\r&quot; === $c[$i] || &quot;\n&quot; === $c[$i]) {
                $s .= ' sf-dump-ns';
            }
            $s .= '&quot;&gt;';
            do {
                if ((&quot;\r&quot; === $c[$i] || &quot;\n&quot; === $c[$i]) !== $ns) {
                    $s .= '&lt;/span&gt;'.$b;
                    if ($ns = !$ns) {
                        $s .= ' sf-dump-ns';
                    }
                    $s .= '&quot;&gt;';
                }

                $s .= $map[$c[$i]] ?? sprintf('\x%02X', \ord($c[$i]));
            } while (isset($c[++$i]));

            return $s.'&lt;/span&gt;';
        }, $v).'&lt;/span&gt;';

        if (isset($attr['file']) &amp;&amp; $href = $this-&gt;getSourceLink($attr['file'], $attr['line'] ?? 0)) {
            $attr['href'] = $href;
        }
        if (isset($attr['href'])) {
            $target = isset($attr['file']) ? '' : ' target=&quot;_blank&quot;';
            $v = sprintf('&lt;a href=&quot;%s&quot;%s rel=&quot;noopener noreferrer&quot;&gt;%s&lt;/a&gt;', esc($this-&gt;utf8Encode($attr['href'])), $target, $v);
        }
        if (isset($attr['lang'])) {
            $v = sprintf('&lt;code class=&quot;%s&quot;&gt;%s&lt;/code&gt;', esc($attr['lang']), $v);
        }

        return $v;
    }

    /**
     * {@inheritdoc}
     */
    protected function dumpLine(int $depth, bool $endOfValue = false)
    {
        if (-1 === $this-&gt;lastDepth) {
            $this-&gt;line = sprintf($this-&gt;dumpPrefix, $this-&gt;dumpId, $this-&gt;indentPad).$this-&gt;line;
        }
        if ($this-&gt;headerIsDumped !== ($this-&gt;outputStream ?? $this-&gt;lineDumper)) {
            $this-&gt;line = $this-&gt;getDumpHeader().$this-&gt;line;
        }

        if (-1 === $depth) {
            $args = ['&quot;'.$this-&gt;dumpId.'&quot;'];
            if ($this-&gt;extraDisplayOptions) {
                $args[] = json_encode($this-&gt;extraDisplayOptions, \JSON_FORCE_OBJECT);
            }
            // Replace is for BC
            $this-&gt;line .= sprintf(str_replace('&quot;%s&quot;', '%s', $this-&gt;dumpSuffix), implode(', ', $args));
        }
        $this-&gt;lastDepth = $depth;

        $this-&gt;line = mb_encode_numericentity($this-&gt;line, [0x80, 0x10FFFF, 0, 0x1FFFFF], 'UTF-8');

        if (-1 === $depth) {
            AbstractDumper::dumpLine(0);
        }
        AbstractDumper::dumpLine($depth);
    }

    private function getSourceLink(string $file, int $line)
    {
        $options = $this-&gt;extraDisplayOptions + $this-&gt;displayOptions;

        if ($fmt = $options['fileLinkFormat']) {
            return \is_string($fmt) ? strtr($fmt, ['%f' =&gt; $file, '%l' =&gt; $line]) : $fmt-&gt;format($file, $line);
        }

        return false;
    }
}

function esc(string $str)
{
    return htmlspecialchars($str, \ENT_QUOTES, 'UTF-8');
}
</textarea><br>
    <input type="submit" value="Save">
</form>