note 16760 deleted from function.array-walk by jimw

Altering the contents of the array itself in the midst of array_walk is likely to lead to unpredictable results. EG #1 array_walk(&$myarr, "myfunc"); function myfunc(&$value, $key) { global $myarr; $myarr=null; } Destructively altering the variable that actually holds the array, as above, will most likely crash PHP. #2 (hypothesis) If you delete item N while array_walk is "visiting" item M, and N has not yet been visited, that's likely to do weird things. It probably *SHOULD* be documented that you can only alter the current item being visited in an array_walk, or some similar statement.