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<?php $str = 'REXEL : Votre dossier Primexel n°@ref_dossier@ expire le @date_expiration@'; preg_match_all('/@([^@]+)@/i', $str, $matches); print_r($matches);
Output for git.master, git.master_jit, rfc.property-hooks
Array ( [0] => Array ( [0] => @ref_dossier@ [1] => @date_expiration@ ) [1] => Array ( [0] => ref_dossier [1] => date_expiration ) )

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