- var_dump: documentation ( source)
- preg_match: documentation ( source)
<?php
$markdown = <<<TEXT
hello!
<blockquote class="twitter-tweet"><p>Le 24/10, c'est RemixjobsDay à la Mairie de Paris. Venez rencontrer nos startups et décrocher un job. <a href="http://t.co/q8h1Dvb38x">http://t.co/q8h1Dvb38x</a> <a href="https://twitter.com/hashtag/rjday?src=hash">#rjday</a> <a href="https://twitter.com/hashtag/startup?src=hash">#startup</a></p>— Korben (@Korben) <a href="https://twitter.com/Korben/status/519044794782605312">October 6, 2014</a></blockquote>
<script async src="//platform.twitter.com/widgets.js" charset="utf-8"></script>
PS : Et je suis un huitre
TEXT;
preg_match('/(\[[^\]]+\]\((https?:)?(\/\/)?(www\.)?twitter\.com\/[^\/]+\/status\/\d+\))<script[^>]*>[^<]*<\/script>/i', $markdown, $matches);
var_dump($matches);