通过比较php中的值从两个数组数组制作数组

Question

I want to create an array which would contain difference of two arrays and the difference is value not key.

Array
(
    [0] => Creator
    [1] => HOD
)
Array
(
    [0] => Manager
    [1] => Creator
    [2] => HOD
)

I want manager as an output. The sequence of arrays should not matter.

Answer 1

You can use array_diff()

In example :

<?php 
$arr1 = array("creator", "hod");
$arr2 = array("manager", "creator", "hod");

$result = array_diff($arr2, $arr1);
//                       ^------^------ notice the order

var_dump($result);

Output

array (size=1)
  0 => string 'manager' (length=7)

This will result the elements of the first parameter that are not in the second.

---

If you are doing :

<?php 
$arr1 = array("creator", "hod");
$arr2 = array("manager", "creator", "hod");

$result = array_diff($arr1, $arr2);
//                       ^------^------ notice the order
var_dump($result);

Output

array (size=0)
  empty

Output is empty because there is no element in the first array that aren't in the second one.

---

If you want to get both differences (the elements that are in first array and not in second and the elements that are in the second array and not in the first one), you can combine twice array_diff() and array_merge()

In example :

$arr1 = array("creator", "hod", "developper");
$arr2 = array("manager", "creator", "hod");

$result1 = array_diff($arr1, $arr2);
$result2 = array_diff($arr2, $arr1);

$result = array_merge($result1, $result2);

var_dump($result);

Output

array (size=2)
  0 => string 'developper' (length=10)
  1 => string 'manager' (length=7