Find if a value exits in the multidimensional array in php

Question

Is there a way to find if a value exists in a multidimensional array?

$comments_array = array();

$comments_array[] = array(
               "comment" => "comment1", 
               "flag_user_id" => "1",
                user_id => "2", 
               "username" => "Xylon",
               "comment_id" => "3"
         );

$comments_array[] = array(
               "comment" => "comment2", 
               "flag_user_id" => "4", 
               user_id => "2", 
               "username" => "Xylon", 
               "comment_id" => "6"
             );

In the above given array, I want to find if comment2 exits and retrieve it's falg_user_id

you go with a loop for each of them http://stackoverflow.com/questions/6990855/php-check-if-value-and-key-exist-in-multidimensional-array — Netorica, Aug 21 '14 at 05:06

score 2 · Answer 1 · edited Aug 21 '14 at 05:35

2

In PHP5.5:

$allComments = array_column($comments_array, 'comment');
$key = array_search('comment2', $allComments);
if($key !== false) {
    $flagUserId = $comments_array[$key]['flag_user_id'];
}

edited Aug 21 '14 at 05:35

Xylon

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answered Aug 21 '14 at 05:11

Scopey

6,269
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score 2 · Accepted Answer · answered Aug 21 '14 at 05:18

Here is an example that I worked out for your question.

foreach ($comments_array as $arr) {
    if (array_key_exists('comment', $arr) && $arr['comment'] == 'comment2') {
        if (array_key_exists('flag_user_id', $arr)) {
            return $arr['flag_user_id'];
        }
    }
    return NULL;
}

array_key_exists() is a PHP method that returns true or false based on if a specified key exists in an array. I simply loop through all sub arrays of your multidimensional array, check if the comments index exists and if it is equal to your specified comment2. If that case is reached, it checks that the flag_user_id index exists and returns it's contents. Otherwise this loop defaults to NULL.

Hope this helps!

score 0 · Answer 3 · answered Aug 21 '14 at 05:07

0

try this

$comment_exists = false;

foreach($comments_array as $arr)
{
    if($arr['comment']=='comment2')
    {
          $comment_exists = true;
    }
}

if($comment_exists)
{
     ehco "exists";
}
else
{
     ehco "not exists";
}

answered Aug 21 '14 at 05:07

Satish Sharma

9,547
6
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put some explanation to the code posted, this will help other to understand it quickly. – Bhushan Kawadkar Aug 21 '14 at 05:28

Find if a value exits in the multidimensional array in php

3 Answers3