<?php $str = '<li data-type="mentionable" data-id="2">bla bla... <li data-type="mentionable" data-id="812">some test <li>bla bla </li>more text <li data-type="mentionable" data-id="282">'; preg_match_all("/data-id=\"(\d+)\"/", $str, $matches); print_r($matches[1]);
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