Using array_diff() on arrays who holds several objects

Question

I have two arrays. The first array holds these values.

[a] => stdClass Object
    (
        [name] => Chris
        [id] => AaKk4j0abEkJSSxYKKnss2LTZc9BmMDrYmm1TFxkIHR8PSU50OagCsl2pgJjVTm7MrkVBVcJgydJGViRU4HHClyWVm3arL4Y5cdWKyZQHtdltg
    )

[b] => stdClass Object
    (
        [name] => John
        [id] => AaL4_sWesWgGcHsd3eoBB3NDvpekzTQHE1J9zLUJs6zZPY7urzXzuhvA3uWuW0IOGiRJPznFsCIJFzZkm2_vIlSU93njnSwgiJbM1fmI9fUulw
    )

[c] => stdClass Object
    (
        [name] => James
        [id] => AaJ3g8G-nssIY7rhMq6pGMI5989ICREh7_MQ37Vre8oNuaBkO-HFgNUWcH2tZdyFwsWOv_kG4eVliss-FY_HmRFh4gmROJKkFCFKMjzatc_2iw
    )

The second array holds these values.

[d] => stdClass Object
    (
        [id] => 1003880559625244
        [name] => Aftab
    )

[e] => stdClass Object
    (
        [id] => 448636891977424
        [name] => John
    )

[f] => stdClass Object
    (
        [id] => 809530442478820
        [name] => James
    )

[g] => stdClass Object
    (
        [id] => 809530442478820
        [name] => Chris
    )

I'm trying to compare both arrays and get only the values that do not match.
For Example in this case Aftab is the one who is not present in array 1 and is unique.
I have tried doing this with array_diff() function in PHP but it is giving this error:

Catchable fatal error: Object of class stdClass could not be converted to string

all the id are unique not the names. i have to select all the names that does not match — Sppidy, Jun 16 '15 at 12:04
The ID's in your example are not the same. If you have something that is unique and consistent within both record sets then just loop both arrays and replace the index with the consistent identifier and then use `array_diff_key()` — Mike Miller, Jun 16 '15 at 12:18

yuk · Answer 1 · 2015-06-16T12:22:28.200

4

Use array_udiff - Computes the difference of arrays by using a callback function for data comparison. http://us.php.net/array_udiff

function compare_names($a, $b)
{
    return strcmp($a->name, $b->name);
}
$newarr = array_udiff($b, $a, 'compare_names');

edited Jun 16 '15 at 12:22

answered Jun 16 '15 at 12:16

yuk

945
7
14

khaliq · Answer 2 · 2015-06-16T13:21:59.600

try this for multidimensional array   

 $array1 = array(
        'a' => array('name' => 'Chris', 'id' => 'AaKk4j0abEkJSSxYKKnss2LTZc9BmMDrYmm1TFxkIHR8PSU50OagCsl2pgJjVTm7MrkVBVcJgydJGViRU4HHClyWVm3arL4Y5cdWKyZQHtdltg'),
        'b' => array('name' => 'John', 'id' => 'AaL4_sWesWgGcHsd3eoBB3NDvpekzTQHE1J9zLUJs6zZPY7urzXzuhvA3uWuW0IOGiRJPznFsCIJFzZkm2_vIlSU93njnSwgiJbM1fmI9fUulw'),
        'c' => array('name' => 'James', 'id' => 'AaJ3g8G-nssIY7rhMq6pGMI5989ICREh7_MQ37Vre8oNuaBkO-HFgNUWcH2tZdyFwsWOv_kG4eVliss-FY_HmRFh4gmROJKkFCFKMjzatc_2iw')
    );

    $array2 = array(
        'd' => array('name' => 'Aftab','id'=>'1003880559625244'),
        'e' => array('name' => 'John','id'=>'448636891977424'),
        'f' => array('name' => 'James','id'=>'809530442478820'),
        'g' => array('name' => 'Chris','id'=>'809530442478820'),
    );
    $result = check_diff_multi($array1, $array2);
    print '<pre>';
    print_r($result);
    print '</pre>';
    function check_diff_multi($array1, $array2){
        $result = array();
        foreach($array1 as $key => $val) {
             if(isset($array2[$key])){
               if(is_array($val) && $array2[$key]){
                   $result[$key] = check_diff_multi($val, $array2[$key]);
               }
           } else {
               $result[$key] = $val;
           }
        }

        return $result;
    }

To get your desired output

[d] => stdClass Object ( [id] => 1003880559625244 [name] => Aftab ) 

$diff = array_udiff($array2,
$array1,
function($array2,$array1){
    return strcmp($array1["name"], $array2["name"]);
    }); 
    print_r($diff);

Output :

Array ( [d] => Array ( [name] => Aftab [id] => 1003880559625244 ) )

no brother its not working. its returning me the full second array.And these array are coming from an api — Sppidy, Jun 16 '15 at 12:21
[d] => stdClass Object ( [id] => 1003880559625244 [name] => Aftab ) — Sppidy, Jun 16 '15 at 13:05
`$diff = array_udiff($array2, $array1, function($array2,$array1){ return strcmp($array1["name"], $array2["name"]); }); print_r($diff);` — khaliq, Jun 16 '15 at 13:18

Using array_diff() on arrays who holds several objects

2 Answers2