Parse Tweet Message to Link Entities

function parse_message( &$tweet ) {
	$replace_index = array();
	if ( !empty($tweet['entities']) ) {
		foreach ($tweet['entities'] as $area => $items) {
			switch ( $area ) {
				case 'hashtags':
					$find = 'text';
					$prefix = '#';
					$url = 'https://twitter.com/search/?src=hash&q=%23';
					break;
				case 'user_mentions':
					$find = 'screen_name';
					$prefix = '@';
					$url = 'https://twitter.com/';
					break;
				case 'media': case 'urls':
					$find = 'display_url';
					$prefix = '';
					$url = '';
					break;
				default: break;
			}
			foreach ($items as $item) {
				$text = $tweet['text'];
				$string = $item->$find;
				$href = $url.$string;
				if (!(strpos($href, 'http://') === 0)) $href = "http://".$href;
				$replace = substr($text,$item->indices[0],$item->indices[1]-$item->indices[0]);
				$with = "<a href=\"$href\">{$prefix}{$string}</a>";
				$replace_index[$replace] = $with;
			}
		}
		foreach ($replace_index as $replace => $with) $tweet['text'] = str_replace($replace,$with,$tweet['text']);
	}
}