<?php
$re = '/:\s*(.*?)\s*\+/';
$str = "Text Test: Look at this + el richie";
echo $matches[1][0];
?>
PD9waHAKJHJlID0gJy86XHMqKC4qPylccypcKy8nOwokc3RyID0gIlRleHQgVGVzdDogTG9vayBhdCB0aGlzICsgZWwgcmljaGllIjsKcHJlZ19tYXRjaF9hbGwoJHJlLCAkc3RyLCAkbWF0Y2hlcyk7CmVjaG8gJG1hdGNoZXNbMV1bMF07Cj8+