php数组去除空值函数分享

/**
?* 办法库-数组去除空值
?* @param string $num? 数值
?* @return string
?*/
public function array_remove_empty(&$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;
??????????? }
??????? }
??? }
}