Php merge duplicate array values in a multidimensional array php

Question

Hello before I've tried how to merge duplicate value from multidimensional array from the link merge duplicate array values in a multidimensional array php

But that answer just only work for two duplicate value and not work for more than two same value. So if I change this code like this:

$arr = array( array('id'=>1, 'email_id'=>'[email protected]', 'password'=>'test'),
  array('id'=>2, 'email_id'=>'[email protected]', 'password'=>'test'), 
  array('id'=>2, 'email_id'=>'[email protected]', 'password'=>'test'), 
  array('id'=>3, 'email_id'=>'[email protected]', 'password'=>'pass'));

  $new_arr = array();
  foreach($arr as $k => $v) {
      if( is_array($arr[$k+1]) && $arr[$k]['password'] === $arr[$k + 1]['password'] )
          $new_arr[] = array($arr[$k], $arr[$k+1]);
      else if( in_array_recursive($arr[$k]['password'], $new_arr) === FALSE ) 
              $new_arr[] = $v;
  }

  function in_array_recursive( $val, $arr) {
      foreach( $arr as $v ) {
          foreach($v as $m) {
              if( in_array($val, $m ) )
                  return TRUE;      
          }
      }
      return FALSE;
  }

echo "<pre>";
print_r($arr);
echo "</pre>";

echo "<pre>";
print_r($new_arr);
echo "</pre>";

And I get the result like this:

Array
(
    [0] => Array
        (
            [0] => Array
                (
                    [id] => 1
                    [email_id] => [email protected]
                    [password] => test
                )

            [1] => Array
                (
                    [id] => 2
                    [email_id] => [email protected]
                    [password] => test
                )

        )

    [1] => Array
        (
            [0] => Array
                (
                    [id] => 2
                    [email_id] => [email protected]
                    [password] => test
                )

            [1] => Array
                (
                    [id] => 2
                    [email_id] => [email protected]
                    [password] => test
                )

        )

    [2] => Array
        (
            [id] => 3
            [email_id] => [email protected]
            [password] => pass
        )

)

And this is not the answer :(, and the results I want is to look like this:

Array
(
    [0] => Array
        (
            [0] => Array
                (
                    [id] => 1
                    [email_id] => [email protected]
                    [password] => test
                )

            [1] => Array
                (
                    [id] => 2
                    [email_id] => [email protected]
                    [password] => test
                )

            [2] => Array
                (
                    [id] => 2
                    [email_id] => [email protected]
                    [password] => test
                )
        )

    [1] => Array
        (
            [id] => 3
            [email_id] => [email protected]
            [password] => pass
        )

)

Answer 1

You can try with this, but it adds extra key as (test, pass , etc ) but i think this not any problem

<?php
$arr = array( array('id'=>1, 'email_id'=>'[email protected]', 'password'=>'test'),
array('id'=>2, 'email_id'=>'[email protected]', 'password'=>'test'), 
array('id'=>2, 'email_id'=>'[email protected]', 'password'=>'test'), 
array('id'=>3, 'email_id'=>'[email protected]', 'password'=>'pass'));


echo "<pre>";
print_r($arr);



foreach($arr as $k => $v) {
    $new_arr[$v['password']][]=$v;
}
print_r($new_arr);
echo "</pre>";

Output:

Array
(
    [test] => Array
        (
            [0] => Array
                (
                    [id] => 1
                    [email_id] => [email protected]
                    [password] => test
                )

            [1] => Array
                (
                    [id] => 2
                    [email_id] => [email protected]
                    [password] => test
                )

            [2] => Array
                (
                    [id] => 2
                    [email_id] => [email protected]
                    [password] => test
                )

        )

    [pass] => Array
        (
            [0] => Array
                (
                    [id] => 3
                    [email_id] => [email protected]
                    [password] => pass
                )

        )

)