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. // The space after the language avoids gluing the actual code with the language tag $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 the code has multiple lines $lines = preg_split('/\r\n|\r|\n/', $code); if (count($lines) > 1) { // Multiple lines detected, adding three backticks and newlines $markdown .= '```' . $language . "\n" . $code . "\n" . '```' . "\n\n"; } else { // One line of code, wrapping it on one backtick. $markdown .= '`' . $language . $code . '`'; } return $markdown; } /** * @return string[] */ public function getSupportedTags() { return array('code'); } }