#46004 [Opn->Bgs]: A non stict condition with 0 return true

ID: 46004 Updated by: tularis@php.net Reported By: roland dot dufour at multiprog dot net -Status: Open +Status: Bogus Bug Type: *General Issues Operating System: Windows Vista Ultimate French PHP Version: 5.2.6 New Comment: Thank you for taking the time to write to us, but this is not a bug. Please double-check the documentation available at http://www.php.net/manual/ and the instructions on how to report a bug at http://bugs.php.net/how-to-report.php Please read the documentation: http://www.php.net/manual/en/types.comparisons.php It clearly states: (int) 0 == (string) "php" (or any string for that matter), this is due to PHP's loose typing auto-converting both to integers (and "php" changes to (int) 0; 0 == 0, so true) Previous Comments: ------------------------------------------------------------------------ [2008-09-05 15:36:48] roland dot dufour at multiprog dot net With a non strict condition, the expected result is : bool(true) bool(false) bool(true) And, with a strict condition, the expected result is : bool(false) bool(false) bool(true) ------------------------------------------------------------------------ [2008-09-05 15:33:49] roland dot dufour at multiprog dot net Description: ------------ When I try a non strict condition 0 == 'test', PHP return true. Reproduce code: --------------- // Non-strict condition var_dump((0 == 'test')); var_dump((1 == 'test')); var_dump(('test' == 'test')); // Strict condition var_dump((0 === 'test')); var_dump((1 === 'test')); var_dump(('test' === 'test')); Expected result: ---------------- bool(false) bool(false) bool(true) I don't understand why a condition 0 == 'test' return true. I discovered this "bug" by exploring the keys of a table via the instruction "foreach". My code was then: $options = array( array(), // an array array(), // an other array 'refProduct' => 'test' // a value ); foreach ($options as $k => $option) { if ('refProduct' == $k){ continue; } // Instructions... } Curiously, only my secondary table ("an other array") was executed by "Instructions...". Actual result: -------------- bool(true) bool(false) bool(true) ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=46004&edit=1