30秒学会 PHP 片段 – remove

Removes elements from an array for which the given function returns false.

Use array_filter() to find array elements that return truthy values and array_diff_keys() to remove the elements not contained in $filtered.

代码实现

function remove($items, $func)
{
  $filtered = array_filter($items, $func);

  return array_diff_key($items, $filtered);
}

使用样例

remove([1, 2, 3, 4], function ($n) {
  return ($n % 2) === 0;
});
// [0 => 1, 2 => 3]