Check if a specific value exists at a specific key in any subarray of a multidimensional array

Question

I need to search a multidimensional array for a specific value in any of the indexed subarrays.

In other words, I need to check a single column of the multidimension

Answer 1

I wrote the following function in order to determine if an multidimensional array partially contains a certain value.

function findKeyValue ($array, $needle, $value, $found = false){
    foreach ($array as $key => $item){
        // Navigate through the array completely.
        if (is_array($item)){
            $found = $this->findKeyValue($item, $needle, $value, $found);
        }

        // If the item is a node, verify if the value of the node contains
        // the given search parameter. E.G.: 'value' <=> 'This contains the value'
        if ( ! empty($key) && $key == $needle && strpos($item, $value) !== false){
            return true;
        }
    }

    return $found;
}

Call the function like this:

$this->findKeyValue($array, $key, $value);

Answer 2

Nothing will be faster than a simple loop. You can mix-and-match some array functions to do it, but they'll just be implemented as a loop too.

function whatever($array, $key, $val) {
    foreach ($array as $item)
        if (isset($item[$key]) && $item[$key] == $val)
            return true;
    return false;
}

Answer 3

As in your question, which is actually a simple 2-D array wouldn't it be better? Have a look-

Let say your 2-D array name $my_array and value to find is $id

function idExists($needle='', $haystack=array()){
    //now go through each internal array
    foreach ($haystack as $item) {
        if ($item['id']===$needle) {
            return true;
        }
    }
    return false;
}

and to call it:

idExists($id, $my_array);

As you can see, it actually only check if any internal index with key_name 'id' only, have your $value. Some other answers here might also result true if key_name 'name' also has $value

Answer 4

Here is an updated version of Dan Grossman's answer which will cater for multidimensional arrays (what I was after):

function find_key_value($array, $key, $val)
{
    foreach ($array as $item)
    {
        if (is_array($item) && find_key_value($item, $key, $val)) return true;

        if (isset($item[$key]) && $item[$key] == $val) return true;
    }

    return false;
}

Answer 5

The simplest way is this:

$my_array = array(    
    0 =>  array(  
        "name"   => "john",  
        "id"    =>  4  
    ),  
    1   =>  array(  
        "name" =>  "mark",  
        "id" => 152  
    ), 
    2   =>  array(  
        "name" =>  "Eduard",  
        "id" => 152  
    )
);

if (array_search(152, array_column($my_array, 'id')) !== FALSE)
  echo 'FOUND!';
else
  echo 'NOT FOUND!';

Answer 6

function checkMultiArrayValue($array) {
        global $test;
        foreach ($array as $key => $item) {

            if(!empty($item) && is_array($item)) {
                checkMultiArrayValue($item);
            }else {
                if($item)
                 $test[$key] = $item;

            }
        }
        return $test;   
    }

 $multiArray = array(    
                0 =>  array(  
                      "country"   => "",  
                      "price"    => 4,  
                      "discount-price" => 0,  
               ),);

$test = checkMultiArrayValue($multiArray);
echo "<pre>"
print_r($test);

Will return array who have index and value