note 92257 added to language.types.boolean

@ russell dot harper at springboardnetworks dot com You are not testing whether false or 0.0 evalutes to FALSE but whether the strings containing 'false' or '0.0' evalutes to FALSE. Numbers are never quoted, neither are true and false. The only non-empty string that evaluates to FALSE is '0'. So your test should have been: <?php print 'yes'."\t".((bool)'yes'? 1: 0)."\n"; print 'true'."\t".((bool)true? 1: 0)."\n"; print 'no'."\t".((bool)'no'? 1: 0)."\n"; print 'false'."\t".((bool)false? 1: 0)."\n"; print '1'."\t".((bool)1? 1: 0)."\n"; print '0'."\t".((bool)'0'? 1: 0)."\n"; print '0'."\t".((bool)0? 1: 0)."\n"; print '0.0'."\t".((bool)0.0? 1: 0)."\n"; print ''."\t".((bool)''? 1: 0)."\n"; ?> which prints yes 1 true 1 no 1 false 0 1 1 0 0 0 0 0.0 0 0 ---- Server IP: 195.184.96.15 Probable Submitter: 87.72.212.230 ---- Manual Page -- http://www.php.net/manual/en/language.types.boolean.php Edit -- https://master.php.net/note/edit/92257 Del: integrated -- https://master.php.net/note/delete/92257/integrated Del: useless -- https://master.php.net/note/delete/92257/useless Del: bad code -- https://master.php.net/note/delete/92257/bad+code Del: spam -- https://master.php.net/note/delete/92257/spam Del: non-english -- https://master.php.net/note/delete/92257/non-english Del: in docs -- https://master.php.net/note/delete/92257/in+docs Del: other reasons-- https://master.php.net/note/delete/92257 Reject -- https://master.php.net/note/reject/92257 Search -- https://master.php.net/manage/user-notes.php