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<?php $sbj = addslashes(strip_tags('<iframe width="100%" height="450" scrolling="no" frameborder="no" src="https://w.soundcloud.com/player/?url=https%3A//api.soundcloud.com/tracks/145834350&amp;auto_play=false&amp;hide_related=false&amp;show_comments=true&amp;show_user=true&amp;show_reposts=false&amp;visual=true"></iframe>')); $ptrn = '/^src="([^"]+)/'; preg_match($sbj, $ptrn, $match); print_r($match);
Output for git.master, git.master_jit, rfc.property-hooks
Warning: preg_match(): Empty regular expression in /in/lK2CP on line 7

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