Remove duplicate array on the base of key in multidimendional array PHP

Question

From following array key with ID 16 is comming twice. Hown can we remove this this duplicate ID. (REMOVE IF ID IS DUPLICATE OTHER FIELDS IGNORE)

 Array
   (
     [1] => Array
            (
                [ID] => 16
                [username] => dudda
                [message-time] => 2016-08-25 12:12:53
            )

   [2] => Array
            (
                [ID] => 16
                [username] => dudda
                [message-time] => 2016-08-25 12:01:54
            )

  [3] => Array
            (
                [ID] => 3
                [username] => himanshu
                [message-time] => 2016-08-15 12:53:38
            )

  [4] => Array
            (
                [ID] => 15
                [username] => dawinder
                [message-time] => 2016-08-10 11:40:33
            )
    )

what language is this? also note that the message times are different, are you sure this is a duplicate? — famagusta, Aug 25 '16 at 10:27

score 3 · Accepted Answer · answered Aug 25 '16 at 11:30

I Got solution

I have develop this function for same :

function unique_multidim_array($array, $key) { 
   $temp_array = array(); 
   $i = 0; 
   $key_array = array(); 

foreach($array as $val) { 
    if (!in_array($val[$key], $key_array)) { 
        $key_array[$i] = $val[$key]; 
        $temp_array[$i] = $val; 
    } 
    $i++; 
} 
return $temp_array;

}

Now, call this function anywhere from your code,

something like this,

$details = unique_multidim_array($array_name,'key');

score 1 · Answer 2 · edited Aug 25 '16 at 12:35

1

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

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

edited Aug 25 '16 at 12:35

jmattheis

10,494
11
46
58

answered Aug 25 '16 at 10:30

Senthil

11
1

here message-time is different, we have to remove on the base of ID only. – Himanshu kumar Aug 25 '16 at 11:04

Jayendra Manek · Answer 3 · 2016-08-25T13:37:45.803

1

array array_unique ( array $array [, int $sort_flags = SORT_STRING ] )

Read this:http://php.net/manual/en/function.array-unique.php

For Example

  <?php
$input = array("a" => "green", "red", "b" => "green", "blue", "red");
$result = array_unique($input);
print_r($result);
?>

Output will be:

Array
(
    [a] => green
    [0] => red
    [1] => blue
)

edited Aug 25 '16 at 13:37

answered Aug 25 '16 at 11:03

Jayendra Manek

148
14

This is more of a comment. Quoting the manual is not considered a good answer. Please provide a code example next time. The code you provided is the documentation definition of the function you linked – Machavity Aug 25 '16 at 13:31
Bro I know but when i answered it i was not able to comment(my reputation was less than 50) so i cant comment it. – Jayendra Manek Aug 25 '16 at 13:33
Provide a code example and this is an acceptable answer – Machavity Aug 25 '16 at 13:35

Remove duplicate array on the base of key in multidimendional array PHP

3 Answers3