PHP array_diff_assoc () compare multi-deminsions arrays

Question

I have 2 arrays to find difference

Array1

array (size=5)
  0 => 
    array (size=1)
      'id' => string '1' (length=1)
  1 => 
    array (size=1)
      'id' => string '2' (length=1)
  2 => 
    array (size=1)
      'id' => string '3' (length=1)
  3 => 
    array (size=1)
      'id' => string '4' (length=1)
  4 => 
    array (size=1)
      'id' => string '5' (length=1)

Array2

array (size=1)
  0 => 
    array (size=1)
      'user_id' => string '1' (length=1)

I use array_diff_assoc function to get difference.

Problem:

Notice: Array to string conversion at array_diff_assoc()

Is there function that can compare arrays in arrays?

https://stackoverflow.com/a/71049380/2943403 – mickmackusa Feb 20 '22 at 23:20 — mickmackusa, Feb 20 '22 at 23:20

score 0 · Accepted Answer · answered Sep 29 '14 at 10:30

Just try with array_column:

$array1 = array(
    array('id' => 1),
    array('id' => 2),
    array('id' => 3),
    array('id' => 4),
    array('id' => 5),
);
$array2 = array(
    array('user_id' => 1),
);

$diff = array_diff(array_column($array1, 'id'), array_column($array2, 'user_id'));

var_dump($diff);

Output:

array (size=4)
  1 => int 2
  2 => int 3
  3 => int 4
  4 => int 5

score 0 · Answer 2 · answered Sep 29 '14 at 10:34

0

I feel you should use array_diff_key() instead of array_diff_assoc() because array_diff_assoc() doesn't search recursively. It try to notify user that one of the values in array is also an array and it had to convert it to a string.

answered Sep 29 '14 at 10:34

Ram Sharma

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PHP array_diff_assoc () compare multi-deminsions arrays

2 Answers2