xpathLiteral example

// The CssSelector already prefixes the selector with descendant-or-self::         return $this->filterRelativeXPath($converter->toXPath($selector));
    }

    /** * Selects links by name or alt value for clickable images. */
    public function selectLink(string $value): static
    {
        return $this->filterRelativeXPath(
            sprintf('descendant-or-self::a[contains(concat(\' \', normalize-space(string(.)), \' \'), %1$s) or ./img[contains(concat(\' \', normalize-space(string(@alt)), \' \'), %1$s)]]', static::xpathLiteral(' '.$value.' '))
        );
    }

    /** * Selects images by alt value. */
    public function selectImage(string $value): static
    {
        $xpath = sprintf('descendant-or-self::img[contains(normalize-space(string(@alt)), %s)]', static::xpathLiteral($value));

        return $this->filterRelativeXPath($xpath);
    }

// restore the original name of the input node                 $this->button->setAttribute('name', $name);
            } else {
                $this->set(new Field\InputFormField($this->button));
            }
        }

        // find form elements corresponding to the current form         if ($this->node->hasAttribute('id')) {
            // corresponding elements are either descendants or have a matching HTML5 form attribute             $formId = Crawler::xpathLiteral($this->node->getAttribute('id'));

            $fieldNodes = $xpath->query(sprintf('( descendant::input[@form=%s] | descendant::button[@form=%1$s] | descendant::textarea[@form=%1$s] | descendant::select[@form=%1$s] | //form[@id=%1$s]//input[not(@form)] | //form[@id=%1$s]//button[not(@form)] | //form[@id=%1$s]//textarea[not(@form)] | //form[@id=%1$s]//select[not(@form)] )[not(ancestor::template)]', $formId));
            foreach ($fieldNodes as $node) {
                $this->addField($node);
            }
        } else {
            // do the xpath query with $this->node as the context node, to only find descendant elements             // however, descendant elements with form attribute are not part of this form             $fieldNodes = $xpath->query('( descendant::input[not(@form)] | descendant::button[not(@form)] | descendant::textarea[not(@form)] | descendant::select[not(@form)] )[not(ancestor::template)]', $this->node);
            foreach ($fieldNodes as $node) {
                $this->addField($node);
            }