#18199 [Fbk->Bgs]: is_array check fails???

ID: 18199 Updated by: sniper@php.net Reported By: webmaster@aglaea.net -Status: Feedback +Status: Bogus Bug Type: Arrays related Operating System: Linux PHP Version: 4.1.2 New Comment: Thank you for taking the time to report a problem with PHP. Unfortunately you are not using a current version of PHP -- the problem might already be fixed. Please download a new PHP version from http://www.php.net/downloads.php If you are able to reproduce the bug with one of the latest versions of PHP, please change the PHP version on this bug report to the version you tested and change the status back to "Open". Again, thank you for your continued support of PHP. Previous Comments: ------------------------------------------------------------------------ [2002-08-28 01:01:34] yzhu@ou.edu I just upgraded to php-4.1.2 on RHL 7.2. Before this I was using a php-4.0.6-15, and experienced the same problem as webmaster@aglaea.net did (I assume). One thing should be clear about this issue is is_array fails under a particular circumtance. I encountered this problem when I have a mixed associative array like the following (actually its member's nature most likely automatically generated from some procedures, is not known before you test):(I assume the bug reporter did too) $as_ar = array( array("32"=>5, "you" =>6, "him"=>3, "her"=>2, 8, 3.4), "lone"=>19; array("red"=>"3", "yellow"=>4, "green"=>5), 28 array("east"=>2, "west"=13, "south"=>4, "north"=>5) ); Now, Try this: $keys = array_keys ($as_ar); if (is_array($as_ar[$keys[1]])){ echo "The second element is an array<br>"; } This will print the message on PHP-4.0.6-15. But on the same RHL 7.2, PHP-4.1.2 seems to be able to catch this, and the test return false. I did not test this code on any other versions However, if you believe this test result you will get into trouble. To get around this, I test the value instead the element (or keys). E.g. for this particular array I do: $theKeys = array_keys ($as_ar); $theValue = $as_ar[$theKeys[1]]; if ( is_array($theValue)){ echo "The second element is an array<br>"; } This will actually evaluate the nature of the element, not wether the element is more complex than a simple (indexed) one. I reported this finding on the PHP manual is_array page. And the editor removed it after some days. But this is a real issue, and can be confusing, frustrating too. I hope manual editors put something there to advise people how to cope with the problem. Well... ------------------------------------------------------------------------ [2002-07-06 08:02:28] sander@php.net Can you provide a simple selfcontained sample script that reproduces your problem? ------------------------------------------------------------------------ [2002-07-06 07:52:28] webmaster@aglaea.net Unless I'm dementing fast, this bit of code: $teams = $league->getTeams(); if (is_array($teams)) { array_walk($teams, 'InDiv'); } should not do the array_walk when $teams is either 'null' or '0', but in my page, it keeps on trying to do the array_walk, which obviously goes wrong. I've also tried: if ($teams) { and if ($teams != null) you can see the precise details of my PHP-version and system at www.korfballworld.com/test/info.php ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=18199&edit=1