<form method="POST">
    <h3>Editing: AttributeMatchingExtension.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\CssSelector\XPath\Extension;

use Symfony\Component\CssSelector\XPath\Translator;
use Symfony\Component\CssSelector\XPath\XPathExpr;

/**
 * XPath expression translator attribute extension.
 *
 * This component is a port of the Python cssselect library,
 * which is copyright Ian Bicking, @see https://github.com/SimonSapin/cssselect.
 *
 * @author Jean-François Simon &lt;jeanfrancois.simon@sensiolabs.com&gt;
 *
 * @internal
 */
class AttributeMatchingExtension extends AbstractExtension
{
    /**
     * {@inheritdoc}
     */
    public function getAttributeMatchingTranslators(): array
    {
        return [
            'exists' =&gt; [$this, 'translateExists'],
            '=' =&gt; [$this, 'translateEquals'],
            '~=' =&gt; [$this, 'translateIncludes'],
            '|=' =&gt; [$this, 'translateDashMatch'],
            '^=' =&gt; [$this, 'translatePrefixMatch'],
            '$=' =&gt; [$this, 'translateSuffixMatch'],
            '*=' =&gt; [$this, 'translateSubstringMatch'],
            '!=' =&gt; [$this, 'translateDifferent'],
        ];
    }

    public function translateExists(XPathExpr $xpath, string $attribute, ?string $value): XPathExpr
    {
        return $xpath-&gt;addCondition($attribute);
    }

    public function translateEquals(XPathExpr $xpath, string $attribute, ?string $value): XPathExpr
    {
        return $xpath-&gt;addCondition(sprintf('%s = %s', $attribute, Translator::getXpathLiteral($value)));
    }

    public function translateIncludes(XPathExpr $xpath, string $attribute, ?string $value): XPathExpr
    {
        return $xpath-&gt;addCondition($value ? sprintf(
            '%1$s and contains(concat(\' \', normalize-space(%1$s), \' \'), %2$s)',
            $attribute,
            Translator::getXpathLiteral(' '.$value.' ')
        ) : '0');
    }

    public function translateDashMatch(XPathExpr $xpath, string $attribute, ?string $value): XPathExpr
    {
        return $xpath-&gt;addCondition(sprintf(
            '%1$s and (%1$s = %2$s or starts-with(%1$s, %3$s))',
            $attribute,
            Translator::getXpathLiteral($value),
            Translator::getXpathLiteral($value.'-')
        ));
    }

    public function translatePrefixMatch(XPathExpr $xpath, string $attribute, ?string $value): XPathExpr
    {
        return $xpath-&gt;addCondition($value ? sprintf(
            '%1$s and starts-with(%1$s, %2$s)',
            $attribute,
            Translator::getXpathLiteral($value)
        ) : '0');
    }

    public function translateSuffixMatch(XPathExpr $xpath, string $attribute, ?string $value): XPathExpr
    {
        return $xpath-&gt;addCondition($value ? sprintf(
            '%1$s and substring(%1$s, string-length(%1$s)-%2$s) = %3$s',
            $attribute,
            \strlen($value) - 1,
            Translator::getXpathLiteral($value)
        ) : '0');
    }

    public function translateSubstringMatch(XPathExpr $xpath, string $attribute, ?string $value): XPathExpr
    {
        return $xpath-&gt;addCondition($value ? sprintf(
            '%1$s and contains(%1$s, %2$s)',
            $attribute,
            Translator::getXpathLiteral($value)
        ) : '0');
    }

    public function translateDifferent(XPathExpr $xpath, string $attribute, ?string $value): XPathExpr
    {
        return $xpath-&gt;addCondition(sprintf(
            $value ? 'not(%1$s) or %1$s != %2$s' : '%s != %s',
            $attribute,
            Translator::getXpathLiteral($value)
        ));
    }

    /**
     * {@inheritdoc}
     */
    public function getName(): string
    {
        return 'attribute-matching';
    }
}
</textarea><br>
    <input type="submit" value="Save">
</form>