note 61933 deleted from function.sem-get by nlopess

Note Submitter: ---- This is probably well know but it surprised me : the resource returned by sem_get is not displayable : <?php // Set environnement $filename="/tmp/flock.test"; $ftok = @ftok($filename, "R"); echo var_export($ftok,true); // returns an integer id (ie : '1292017616') $sem = sem_get($sem); // Test variable $sem echo var_export($sem,true); // displays 'NULL' !! echo var_export(is_null($sem), true); //displays 'false' !! echo var_export($sem == true, true); // displays 'true' !! // $sem actually holds our resource because : sem_acquire($sem); // can be tested, it works sem_release($sem); // release semaphor sem_release($sem); // will cast error : Warning: sem_release(): SysV semaphore 2 (key 0x0) is not currently acquired ?>