PHP compare array and return the different

Question

I have two arrays with data in them and I need to compare the two and return the array that are not matched.

I have two arrays that both look like this:

$arr1 = array(
           array('name' => 'Alan', 'age' => '34', 'country' => 'usa'),
           array('name' => 'James', 'age' => '24', 'country' => 'spain' ),
           );

$arr2 = array(
           array('name' => 'Alan', 'age' => '34', 'country' => 'usa'),
           array('name' => 'James', 'age' => '54', 'country' => 'spffain' ),
        );

i would like comparing the array by name,age and country and return me the array that are not matched.

my code so far:

$intersect = array_uintersect($arr1, $arr2, 'compareDeepValue');
echo "<pre>", print_r($intersect);

function compareDeepValue($val1, $val2)
{
    return strcmp($val1['age'], $val2['age']);
    return strcmp($val1['country'], $val2['country']);
    return strcmp($val1['name'], $val2['name']);

}

The code above return the array that are matched. How can i changed the code in order to get the array that are not matched?

EXPECTED OUTPUT:

Array
(
    [0] => Array
        (
            [name] => James
            [age] => 21
            [country] => spain
        )

)

Your compareDeepValue has 3 return statements. Only first is reachreachable. — Wojciech Jasiński
– Wojciech Jasiński, Commented Jul 28, 2015 at 7:15

Kleskowy · Accepted Answer · 2015-07-28 07:55:06Z

3

The code mentioned by someone in answers will work, but it's manual labor :) You could use existing functions to do the job for you. For computing the difference between arrays, you should use array_udiff function (or functions related).

You should write function to compare arrays, and use it to compute the difference, like this:

<?php
$arr1 = array(
       array('name' => 'Alan', 'age' => '34', 'country' => 'usa'),
       array('name' => 'James', 'age' => '24', 'country' => 'spain' ),
       );

$arr2 = array(
       array('name' => 'Alan', 'age' => '34', 'country' => 'usa'),
       array('name' => 'James', 'age' => '54', 'country' => 'spffain' ),
    );

// this function checks if 2 arrays with keys and scalar values are the same
function array_same_check($deepArr1, $deepArr2) {
   //check if arrays are the same
   $diffArr = array_diff_assoc($deepArr1, $deepArr2);
   //if $diffArr has 0 elements - arrays are the same
   if (count($diffArr) === 0) {
      return 0;
   }
   // arrays are not the same - return arbitratry 1 or -1
   return 1;
}

// now let's compare $arr1 and $arr2 you have 
// (meaning: compare the difference between arrays containing arrays) - we use function above
$differing = array_udiff ($arr1, $arr2, 'array_same_check');

print_r($differing);

I copied this code to PHPFiddle and it seems to work as expected.

edited Jul 28, 2015 at 7:55

answered Jul 28, 2015 at 7:39

Kleskowy

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2 Comments

Domain Over a year ago

@Kleskowy, I really liked this one but just FYI this would just print the unmatched array in Main Array 1 & not the corresponding unmatched array in Main array 2.

Kleskowy Over a year ago

@WisdmLabs sure, just as all array_diff functions would. Doing it again with arrays passed in reversed order and you have all unmatching results.

Domain · Accepted Answer · 2015-07-28 07:28:37Z

3

Your Arrays:

$arr1 = array(
           array('name' => 'Alan', 'age' => '34', 'country' => 'usa'),
           array('name' => 'James', 'age' => '24', 'country' => 'spain' ),
           );

$arr2 = array(
           array('name' => 'Alan', 'age' => '34', 'country' => 'usa'),
           array('name' => 'James', 'age' => '54', 'country' => 'spffain' ),
        );



foreach($arr1 as $key=>$arr)
{
 $bool = true; 
 $ar1 = $arr;
 $ar2 = $arr2[$key];

 foreach($ar1 as $ky=>$val)
{
  if($val != $ar2[$ky])
  {
    $bool = false;
    break;
  }
}

 if(!$bool)
{
  echo "Unmatched Arrays: \r\n";
  print_r($ar1); echo " in  Main Array 1 &  \r\n";
  print_r($ar2); echo " in  Main Array 2. \r\n";
}

}

edited Jul 28, 2015 at 7:28

answered Jul 28, 2015 at 7:22

Domain

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2 Comments

Domain Over a year ago

Dear, the boolean condition wasn't proper. Try now! Thanks!

Kleskowy Over a year ago

@maxcheng This probably works with data provided with the example, but IMHO comparisons are weak here and this code is not that re-usable. Check out my answer if you like.

Gulim Shah · Accepted Answer · 2015-07-28 07:50:45Z

2

try this one

$arr1 = array(
       array('name' => 'Alan', 'age' => '34', 'country' => 'usa'),
       array('name' => 'James', 'age' => '24', 'country' => 'spain' ),
       );

$arr2 = array(
       array('name' => 'Alan', 'age' => '34', 'country' => 'usa'),
       array('name' => 'James', 'age' => '54', 'country' => 'spffain' ),
    );


$tmpArray = array();

 foreach($arr1 as $data1) {

  $duplicate = false;
   foreach($arr2 as $data2) {
    if($data1['name'] === $data2['name'] && $data1['age'] === $data2['age'] && $data1['country'] === $data2['country']) $duplicate = true;
    }

 if($duplicate === false) $tmpArray[] = $data1;
 }
 echo "<pre>", print_r($tmpArray);

answered Jul 28, 2015 at 7:50

Gulim Shah

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Comments

vhu · Accepted Answer · 2015-07-28 08:24:49Z

2

$intersect = array_uintersect($arr1, $arr2, 'compareDeepValue');
print_r($intersect);
// add this and it will return the missing array.
print_r(array_diff_key($arr1, $intersect));

function compareDeepValue($val1, $val2)
{
    return strcmp($val1['age'], $val2['age']);
    return strcmp($val1['country'], $val2['country']);
    return strcmp($val1['name'], $val2['name']);
}

edited Jul 28, 2015 at 8:24

vhu

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answered Jul 28, 2015 at 8:13

Amit Rana

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Comments

Benjamin Wenzel · Accepted Answer · 2015-07-28 07:53:13Z

I would like to give you another possible solution. I've checked the code and it seems to fit your needs.

    /** @var array $arr1 */
    $arr1 = array(
            array(
                    'name'    => 'Alan',
                    'age'     => '34',
                    'country' => 'usa'
            ),
            array(
                    'name'    => 'James',
                    'age'     => '24',
                    'country' => 'spain'
            ),
    );

    /** @var array $arr2 */
    $arr2 = array(
            array(
                    'name'    => 'Alan',
                    'age'     => '34',
                    'country' => 'usa'
            ),
            array(
                    'name'    => 'James',
                    'age'     => '54',
                    'country' => 'spffain'
            ),
    );

    /** @var array $notMatched */
    $notMatched = array();
    /**
     * @var int   $index
     * @var array $element
     */
    foreach($arr1 as $index => $element) {
        /**
         * @var string $key
         * @var string $value
         */
        foreach($element as $key => $value) {
            if($arr2[$index][$key] !== $value) {
                $notMatched["arr1"] = $arr1[$index];
                $notMatched["arr2"] = $arr2[$index];
            }
        }
    }
    if(!empty($notMatched)) {
        echo "Unmatched arrays: \r\n";
        echo "Array 1:\r\n";
        print_r($notMatched["arr1"]);
        echo "Array 2:\r\n";
        print_r($notMatched["arr2"]);
    }

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