PHP取不定个数数组交集

最近有个需求，有一个N个二维数组，N是动态的，不固定个数，现需取这N个数组的交集内容。

• 用到的函数是array_intersect_assoc
• 用法


$result_arr = array_intersect_assoc($arr_sourse[0],$arr_sourse[1],.......$arr_sourse[N-1]);


• 数组内容


$arr1 = ["16","2","3","6","9","17"];
$arr2 = ["16","2","3","9","15"];
$arr3 = ["16","2","3","6","8","17"];


固定数组的用法


$diff = array_intersect($arr1,$arr2,$arr3);
echo '<pre>';
print_r($diff);// ["16","2","3"]


不固定数组用法

• 只需用 call_user_func_array 来执行 array_intersect_assoc 就可以了
• 具体用法


$result_array = call_user_func_array ('array_intersect_assoc', array($arr1, $arr2,$arr3));
echo '<pre>';
print_r($result_array);// ["16","2","3"]


原文地址：https://segmentfault.com/a/1190000016877744