Recursively remove empty elements and subarrays from a multi-dimensional array
I can't seem to find a simple, straight-forward solution to the age-old problem of removing empty elements from arrays in PHP.
My input array may look like this:
Array ( [0] => Array ( [Name] => [EmailAddress] => ) )
(And so on, if there's more data, although there may not be...)
If it looks like the above, I want it to be completely empty after I've processed it.
So print_r($array); would output:
Array ( )
If I run $arrayX = array_filter($arrayX); I still get the same print_r output. Everywhere I've looked suggests this is the simplest way of removing empty array elements in PHP5, however.
I also tried $arrayX = array_filter($arrayX,'empty_array'); but I got the following error:
Warning: array_filter() [function.array-filter]: The second argument, 'empty_array', should be a valid callback
What am I doing wrong?
Answer
Try using array_map() to apply the filter to every array in $array:
$array = array_map('array_filter', $array);
$array = array_filter($array);