php统计数组元素出现的次数

//将数组转换成1维
function format_array($arr = array()){
    if (empty($arr)) return array();
    if (!is_array($arr)) return array($arr);
    static $result = array();
    foreach($arr as $val){
        if (is_array($val)){
            format_array($val);
        } else{
            $result[] = $val;
        }
    }
    return $result;
}

function statistics_count(){
    $args = func_get_args();
    $arr = format_array($args);
    $result = array('string' => array(), 'number' => array());
    foreach($arr as $val){
        if (is_string($val)){
            $result['string'][$val] = isset($result['string'][$val]) ? $result['string'][$val] + 1 : 1;
        } else{
            $result['number'][$val] = isset($result['number'][$val]) ? $result['number'][$val] + 1 : 1;
        }
    }
    return $result;
}

$arr1 = array('a', 'b', array(1,2,3,4,'dd','fdf','nid','innid','iii','ieir'));
$arr2 = array('d', 'de', 'ef','2','5','8');
$arr3 = array('a', 'ef', 'r', 'q');
$arr4 = array('b', 'de', 'q', 'z');
$arr5 = array('1', 'de', 'q', '3r');
$arr6 = array(1, 1, 2, 'mn', '0y');
$arr7 = array(1, 'v2d', 'mn', '0y');

print_r(statistics_count($arr1, $arr2, $arr3, $arr4, $arr5, $arr6, $arr7));

输出：

Array
(
    [string] => Array
        (
            [a] => 2
            [b] => 2
            [dd] => 1
            [fdf] => 1
            [nid] => 1
            [innid] => 1
            [iii] => 1
            [ieir] => 1
            [d] => 1
            [de] => 3
            [ef] => 2
            [2] => 1
            [5] => 1
            [8] => 1
            [r] => 1
            [q] => 3
            [z] => 1
            [1] => 1
            [3r] => 1
            [mn] => 2
            [0y] => 2
            [v2d] => 1
        )

    [number] => Array
        (
            [1] => 4
            [2] => 2
            [3] => 1
            [4] => 1
        )

)