Doc #65904 [Ver->Csd]: array_keys($array, null) does not behave the same as array_keys($array)

Edit report at https://bugs.php.net/bug.php?id=65904&edit=1 ID: 65904 Updated by: frozenfire@php.net Reported by: avi at alphapipe dot com Summary: array_keys($array, null) does not behave the same as array_keys($array) -Status: Verified +Status: Closed Type: Documentation Problem Package: Arrays related Operating System: Ubuntu 12.04.3 LTS PHP Version: 5.4.20 -Assigned To: +Assigned To: frozenfire Block user comment: N Private report: N New Comment: The fix for this bug has been committed. Snapshots of the sources are packaged every three hours; this change will be in the next snapshot. You can grab the snapshot at http://snaps.php.net/. For Windows: http://windows.php.net/snapshots/ Thank you for the report, and for helping us make PHP better. Previous Comments: ------------------------------------------------------------------------ [2013-12-31 20:14:32] frozenfire@php.net Automatic comment from SVN on behalf of frozenfire Revision: http://svn.php.net/viewvc/?view=revision&amp;revision=332548 Log: Removed initializer from the search_value parameter, as it was incorrect and confusing. Fixes bug #65904. ------------------------------------------------------------------------ [2013-10-15 19:52:33] bwoebi@php.net Actually this is a documentation problem. array_keys() has no default value for the second parameter. (Reason: You might want to search for keys where value is equal to null.) ------------------------------------------------------------------------ [2013-10-15 19:30:12] avi at alphapipe dot com Description: ------------ According to the documentation at http://php.net/manual/en/function.array-keys.php, the default value for the second parameter in array_keys ($search_value) is null. However, if you call the function and pass in null as the second value, the function returns an empty array, instead of the array of keys (as it appears to be searching for actual keys that match null). Shouldn't a function behave the same way if a parameter is left blank or if the default value is passed in? Test script: --------------- <?php $muppetColors = [ 'fozzie' => 'orange', 'kermit' => 'green' ]; print_r(array_keys($muppetColors)); print_r(array_keys($muppetColors, null)); Expected result: ---------------- Both print_r statements should return arrays [ 'fozzie', 'kermit' ]. Actual result: -------------- The first print_r statement returns the expected array [ 'fozzie', 'kermit' ], but the second print_r returns an empty array. ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=65904&edit=1