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//二维数组根据指定键去重
function arr_uniq($arr,$key)
{
    $key_arr = [];
    foreach ($arr as $k => $v) {
        if (in_array($v[$key],$key_arr)) {
            unset($arr[$k]);
        } else {
            $key_arr[] = $v[$key];
        }
    }
    sort($arr);
    return $arr;
}