Blog.php

foreach ($shortcodes as $key => $shortcode) {
	if (
		preg_match_all('/'. $pattern .'/s', $content, $matches) &&
		array_key_exists(2, $matches) &&
		in_array($shortcode, $matches[2])
	)  {
		switch ($shortcode) {
			case 'row':
				$content = preg_replace('/\[' . $shortcode . '(.*?)\]/s', '<row>', $content);
				$content = str_replace('[/row]', '</row>', $content);
				break;
			case 'intro':
				$content = preg_replace('/\[' . $shortcode . '(.*?)\]/s', '<p>', $content);
				$content = str_replace('[/' . $shortcode . ']', '</p>', $content);
				break;
			case ($shortcode == 'btn_primary' || $shortcode == 'arrow_callout'):
				preg_match_all('/\[' . $shortcode . '(\s.*?)?\](?:([^\[]+)?\[\/' . $shortcode . '\])?/', $content, $matches);
				
				foreach ($matches[0] as $match) {
					preg_match_all('/(\w+)\s*=\s*"(.*?)"/', $match, $shortcode_attrs);

					$attributes = [];
					foreach ($shortcode_attrs[0] as $shortcode) {
						preg_match_all('/([^\r\n\t\f\v= \'"]+)(?:=(["\'])?((?:.(?!\2?\s+(?:\S+)=|\2))+.)\2?)?/', $shortcode, $attr);
						$attributes[$attr[1][0]] = $attr[3][0];
					}

					preg_match('/\](.*?)\[\/btn_primary]/', $match, $link_text);

					$new = '<ctabutton href="' . $attributes['href'] . '">' . $link_text[1] . '</ctabutton>'; 
					$content = str_replace($match, $new, $content);
				}
				break;
			case 'gallery':
				preg_match_all('/\[gallery(\s.*?)?\](?:([^\[]+)?\[\/gallery\])?/', $content, $matches);
				
				foreach ($matches[0] as $match) {
					preg_match_all('/(\w+)\s*=\s*"(.*?)"/', $match, $shortcode_attrs);

					$attributes = [];
					$image_string = '';
					foreach ($shortcode_attrs[0] as $shortcode) {
						preg_match_all('/([^\r\n\t\f\v= \'"]+)(?:=(["\'])?((?:.(?!\2?\s+(?:\S+)=|\2))+.)\2?)?/', $shortcode, $attr);
						$attributes[$attr[1][0]] = $attr[3][0];
					}

					if (!empty($attributes['ids'])) {
						$images = explode(',', $attributes['ids']);
					}

					foreach ($images as $image) {
						$image_string .= '<galleryimage src="' . wp_get_attachment_url($image) . '"></galleryimage>';
					}    

					$new = '<row>' . $image_string . '</row>';
					$content = str_replace($match, $new, $content);
				}
				break;
			default:
				$content = preg_replace('/\[' . $shortcode . '(.*?)\]/s', '<div>', $content);
				$content = str_replace('[/' . $shortcode . ']', '</div>', $content);
				break;
		}
	}
}