note 107687 added to language.expressions

evaluation order of subexpressions is not strictly defined for all operators <?php function a() {echo 'a';} function b() {echo 'b';} a() == b(); // outputs "ab", ie evaluates left-to-right $a = 3; var_dump( $a == $a = 4 ); // outputs bool(true), ie evaluates right-to-left ?> this is not a bug: "we [php developers] make no guarantee about the order of evaluation". See https://bugs.php.net/bug.php?id=61188 ---- Server IP: 69.147.83.197 Probable Submitter: 81.241.107.110 ---- Manual Page -- http://www.php.net/manual/en/language.expressions.php Edit -- https://master.php.net/note/edit/107687 Del: integrated -- https://master.php.net/note/delete/107687/integrated Del: useless -- https://master.php.net/note/delete/107687/useless Del: bad code -- https://master.php.net/note/delete/107687/bad+code Del: spam -- https://master.php.net/note/delete/107687/spam Del: non-english -- https://master.php.net/note/delete/107687/non-english Del: in docs -- https://master.php.net/note/delete/107687/in+docs Del: other reasons-- https://master.php.net/note/delete/107687 Reject -- https://master.php.net/note/reject/107687 Search -- https://master.php.net/manage/user-notes.php