note 81363 added to language.expressions

<?php // Compound booleans expressed as string args in an 'if' statement don't work as expected: // // Context: // 1. I generate an array of counters // 2. I dynamically generate a compound boolean based on selected counters in the array // Note: since the real array is sparse, I must use the 'empty' operator // 3. When I submit the compound boolean as the expression of an 'if' statement, // the 'if' appears to resolve ONLY the first element of the compound boolean. // Conclusion: appears to be a short-circuiting issue $aArray = array(1,0); // Case 1: 'if' expression passed as string: $sCondition = "!empty($aArray[0]) && !empty($aArray[1])"; if ($sCondition) { echo "1. Conditions met<br />"; } else { echo "1. Conditions not met<br />"; } // Case 1 output: "1. Conditions met" // Case 2: same as Case 1, but using catenation operator if ("".$sCondition."") { echo "2. Conditions met<br />"; } else { echo "2. Conditions not met<br />"; } // Case 2 output: "2. Conditions met" // Case 3: same 'if' expression but passed in context: if (!empty($aArray[0]) && !empty($aArray[1])) { echo "3. Conditions met<br />"; } else { echo "3. Conditions not met<br />"; } // Case 3 output: "3. Conditions not met" // jvm@jvmyers.com ?> PS: the bug folks say this "does not imply a bug in PHP itself." Sure bugs me! ---- Server IP: 69.147.83.197 Probable Submitter: 70.196.169.82 ---- Manual Page -- http://www.php.net/manual/en/language.expressions.php Edit -- https://master.php.net/note/edit/81363 Del: integrated -- https://master.php.net/note/delete/81363/integrated Del: useless -- https://master.php.net/note/delete/81363/useless Del: bad code -- https://master.php.net/note/delete/81363/bad+code Del: spam -- https://master.php.net/note/delete/81363/spam Del: non-english -- https://master.php.net/note/delete/81363/non-english Del: in docs -- https://master.php.net/note/delete/81363/in+docs Del: other reasons-- https://master.php.net/note/delete/81363 Reject -- https://master.php.net/note/reject/81363 Search -- https://master.php.net/manage/user-notes.php