php中unset函数的使用

void unset ( mixed $var [, mixed $... ] )

/*

 *$arr = array('', 'test', '   ');

 *dump($arr);输出结果中将只有 'test'

 *$arr = www.why114.com ;

 *$arr = www.92jzh.com ;

 */

public function removeEmpty($arr, $trim = TRUE)

{

    foreach ($arr as $key => $value){

        if (is_array($value)){

            self::removeEmpty($arr[$key]);

        }

        else{

            $value = trim($value);

            if ($value == ''){

                unset($arr[$key]);

            }

            elseif ($trim){

                $arr[$key] = $value;

            }

        }

    }

}