PHP array removal null function share _php instance

For a one-dimensional PHP array, how do you clear the element where the value is empty? The direct approach is a Foreach loop, one after the other to determine the exclusion. But this method is still slightly more complex, the following share a look at today a method, very concise

Copy the Code code as follows:
/**
* Method Library-array to remove null values
* @param string $num value
* @return String
*/
Public Function Array_remove_empty (& $arr, $trim = True) {
if (!is_array ($arr)) return false;
foreach ($arr as $key = = $value) {
if (Is_array ($value)) {
Self::array_remove_empty ($arr [$key]);
} else {
$value = ($trim = = True)? Trim ($value): $value;
if ($value = = "") {
Unset ($arr [$key]);
} else {
$arr [$key] = $value;
}
}
}
}

is not a very useful function, I hope you can like it.

