Php: Check for Duplicate Values in a Multidimensional Array

PHP: Check for duplicate values in a multidimensional array

This will remove duplicate items from your array using array_unique():

$new_arr = array_unique($arr, SORT_REGULAR);

How to detect duplicate values in multidimensional associative array?

Simple solution is:

<?php

$data = [
  [
    'name' => 'name 1',
    'phone' => '12341234',
    'email' => 'test@web.com'
  ],
  [
    'name' => 'name 2',
    'phone' => '12341234',
    'email' => 'test@web1.com'
  ],
  [
    'name' => 'name 3',
    'phone' => '4322342',
    'email' => 'test@web1.com'
  ],
  [
    'name' => 'name 4',
    'phone' => '1234123423',
    'email' => 'test@web1.com'
  ],
  [
    'name' => 'name 5',
    'phone' => '12341266634',
    'email' => 'test@eqweqwweb.com'
  ],
];

$phones = [];
$emails = [];
foreach ($data as $key => $contact) {
  if (array_search($contact['phone'], $phones) !== false || array_search($contact['email'], $emails) !== false) {
    unset($data[$key]);
  } else {
    $phones[] = $contact['phone'];
    $emails[] = $contact['email'];
  }
}

var_dump($data);

and in result you'll get:

array(3) {
  [0] =>
  array(3) {
    'name' =>
    string(6) "name 1"
    'phone' =>
    string(8) "12341234"
    'email' =>
    string(12) "test@web.com"
  }
  [2] =>
  array(3) {
    'name' =>
    string(6) "name 3"
    'phone' =>
    string(7) "4322342"
    'email' =>
    string(13) "test@web1.com"
  }
  [4] =>
  array(3) {
    'name' =>
    string(6) "name 5"
    'phone' =>
    string(11) "12341266634"
    'email' =>
    string(18) "test@eqweqwweb.com"
  }
}

this is just example.

How can I get the duplicate multidimensional array in php

// first : get all data, if the data same / duplicate take only one data

$unique = array_unique($data, SORT_REGULAR);

// then, get the data which duplicate with

$diffCellUniq = array_diff_key($data, $unique);

// so print the result

print_r($diffCellUniq); exit;

---

Array
(
    [2] => Array
        (
            [a] => 1
            [b] => 2
            [c] => 3
            [d] => 4
        )

)

find duplicate value in multi-dimensional array

<?php
$array = array(array(7,18), array(12,7), array(12, 7, 13));
$result = array();

$first = $array[0];
for($i=1; $i<count($array); $i++){
 $result = array_intersect ($first, $array[$i]);
 $first = $result;
}
print_r($result);//7
?>

How to check if duplicate values of some indexes exist in multi dimensional array or not?

I achieved above scenario like this:

Dont know which one is best mine or other's who posted answers.

foreach($data as $key => $row)
{
    $combinedarr[] = array("name"=>$row["name"],"type"=>$row["type"]);
}
//chck if same facilitiy is being visit on same date twice
$countcomb = count($combinedarr);
$uniquearr = array_unique($combinedarr, SORT_REGULAR);
if($countcomb==count($uniquearr)){
}else{
    //yes duplicate exists
};

Thanks again for those who answered.

How to remove duplicate values from a multi-dimensional array in PHP

Here is another way. No intermediate variables are saved.

We used this to de-duplicate results from a variety of overlapping queries.

$input = array_map("unserialize", array_unique(array_map("serialize", $input)));

Finding duplicate values in multidimensional array

$output = array();
// loop through each user
foreach ($users as $id => $ips) {
    // loop through each IP address
    foreach ($ips as $ip) {
        // add IP address, if not present
        if (!isset($output[$ip])) {
            $output[$ip] = array();         
        }
        // add user ID to the IP address' array
        $output[$ip][] = $id;
    }
}

PHP How to count duplicate values in 2D array?

You can use array_count_values and array_column.

$counts = array_count_values(array_column($arr, "usr_name"));

This should give you an associative array with key being the name and the value being the count of that name.

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