- var_dump: documentation ( source)
- preg_match: documentation ( source)
<?php
$subject = "Le contenu '_sdqddqsqdqsdsqsdPoste 1682dqsdqsdqsdsqdsq663579_', de type 'Mur post', a été créé.";
$pattern = "#'([^']+)'(?:[^']+)'([^']+)'#";
preg_match($pattern, $subject, $match);
var_dump($match);