How to get the difference of two multidimensional arrays in php? - php

Question

I want to get the difference of two multidimensional arrys, e.g.,
First Array:
Array
(
[qtr_selected] => Array
(
[partner_q_m_p__2031] => Array
(
[0] => q1
[1] => q2
)
[partner_q_m_p__2032] => Array
(
[0] => q1
)
)
)
Second Array:
Array
(
[qtr_completed] => Array
(
[partner_q_m_p__2031] => Array
(
[0] => q1
)
)
)
how do i get the difference of array1 & array2 as given below:
Array
(
[qtr_final] => Array
(
[partner_q_m_p__2031] => Array
(
[0] => q2
)
[partner_q_m_p__2032] => Array
(
[0] => q1
)
)
)
Tried array_diff() function but not getting array1 as difference except array2, i want array1 after subtracting array2 from it.

Answer 1

Simply make a custom function like as
function check_diff($arr1, $arr2){
$check = (is_array($arr1) && count($arr1)>0) ? true : false;
$result = ($check) ? ((is_array($arr2) && count($arr2) > 0) ? $arr2 : array()) : array();
if($check){
foreach($arr1 as $key => $value){
if(isset($result[$key])){
$result[$key] = array_diff($value,$result[$key]);
}else{
$result[$key] = $value;
}
}
}
return $result;
}
$result['qtr_final'] = check_diff($a1['qtr_selected'],$a2['qtr_completed']);
print_r($result);

Answer 2

Try as below :
$a1 = Array
(
'qtr_selected' => Array
(
'partner_q_m_p__2031' => Array
(
'0' => 'q1',
'1' => 'q2',
),
'partner_q_m_p__2032' => Array
(
'0' => 'q1'
)
)
);
$a2 = Array
(
'qtr_completed' => Array
(
'partner_q_m_p__2031' => Array
(
'0' => 'q1'
)
)
);
$result['qtr_final'] = check_diff_multi($a1['qtr_selected'],
$a2['qtr_completed']);
print '<pre>';
print_r($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;
}

Answer 3

You can get difference of array1 and array2 by using this:
<?
// array 1
$array1['qtr_selected']['partner_q_m_p__2031'] = array('q1','q2');
$array1['qtr_selected']['partner_q_m_p__2032'] = array('q1');
// array 2
$array2['qtr_completed']['partner_q_m_p__2031'] = array('q1');
$removalArr = array();
foreach ($array2 as $key1 => $value1) {
foreach ($value1 as $key2 => $value2) {
$removalArr = $value2; // get last value of removal array
}
}
$finalArr = array();
foreach ($array1 as $key1 => $value1) {
foreach ($value1 as $key2 => $value2) {
// check difference if available,
// if difference available use array_diff else use normal.
$finalArr['qtr_final'][$key2] = (array_diff($value2,$removalArr) ? array_diff($value2,$removalArr) : $value2);
}
}
echo "<pre>";
print_r($finalArr);
?>
Result:
Array
(
[qtr_final] => Array
(
[partner_q_m_p__2031] => Array
(
[1] => q2
)
[partner_q_m_p__2032] => Array
(
[0] => q1
)
)
)