getAttribute('class'); if ($classes) { // Since tags can have more than one class, we need to find the one that starts with 'language-' $classes = explode(' ', $classes); foreach ($classes as $class) { if (strpos($class, 'language-') !== false) { // Found one, save it as the selected language and stop looping over the classes. $language = str_replace('language-', '', $class); break; } } } $markdown = ''; $code = html_entity_decode($element->getChildrenAsString()); // In order to remove the code tags we need to search for them and, in the case of the opening tag // use a regular expression to find the tag and the other attributes it might have $code = preg_replace('/]*>/', '', $code); $code = str_replace('', '', $code); // Checking if it's a code block or span if ($this->shouldBeBlock($element, $code)) { // Code block detected, newlines will be added in parent $markdown .= '```' . $language . "\n" . $code . "\n" . '```'; } else { // One line of code, wrapping it on one backtick, removing new lines $markdown .= '`' . preg_replace('/\r\n|\r|\n/', '', $code) . '`'; } return $markdown; } /** * @return string[] */ public function getSupportedTags() { return array('code'); } /** * @param ElementInterface $element * @param string $code * * @return bool */ private function shouldBeBlock(ElementInterface $element, $code) { if ($element->getParent()->getTagName() == 'pre') { return true; } if (preg_match('/[^\s]` `/', $code)) { return true; } return false; } }