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@ 2015-12-13T22:03:41Z

<?php

$arr = array(
  'key' => 'foo',
  'key2' => 'bar',
   0 => 'num_foo',
   1 => 'num_bar'
);

$new_array = array_filter ($arr, function($key) { return is_int($key); }, ARRAY_FILTER_USE_KEY);

var_dump($new_array);

Output
Performance
VLD
References
Branches

var_dump: documentation ( source)
array_filter: documentation ( source)

preferences:dark modelive previewkey bindings

29.13 ms | 405 KiB | 5 Q