note 113114 added to reserved.variables.session

Be carefull with $_SESSION array elements when you have the same name as a normal global. The following example leads to unpredictable behaviour of the $wppa array elements, some are updated by normal code, some not, it is totally unpredictable what happens. <?php global $wppa; $wppa = array( 'elm1' => 'value1', 'elm2' => 'value2', ....etc...); if ( ! session_id() ) @ session_start(); if ( ! isset($_SESSION['wppa']) $_SESSION['wppa'] = array(); if ( ! isset($_SESSION['wppa']['album']) ) $_SESSION['wppa']['album'] = array(); $_SESSION['wppa']['album'][1234] = 1; $wppa['elm1'] = 'newvalue1'; print_r($_SESSION); ?> This will most likely display Array ( [wppa] => Array ( [album] => Array ( [1234] => 1 ) [elm1] => 'newvalue1' [elm2] => 'value2' ... etc ... But setting $wppa['elm1'] to another value or referring to it gives unpredictable results, maybe 'value1', or 'newvalue1'. The most strange behaviour is that not all elements of $wppa[xx] show up as $_SESSION['wppa'][xx]. ---- Server IP: 69.147.83.199 Probable Submitter: 188.203.174.57 ---- Manual Page -- http://php.net/manual/en/reserved.variables.session.php Edit -- https://master.php.net/note/edit/113114 Del: integrated -- https://master.php.net/note/delete/113114/integrated Del: useless -- https://master.php.net/note/delete/113114/useless Del: bad code -- https://master.php.net/note/delete/113114/bad+code Del: spam -- https://master.php.net/note/delete/113114/spam Del: non-english -- https://master.php.net/note/delete/113114/non-english Del: in docs -- https://master.php.net/note/delete/113114/in+docs Del: other reasons-- https://master.php.net/note/delete/113114 Reject -- https://master.php.net/note/reject/113114 Search -- https://master.php.net/manage/user-notes.php