Grab array value if a specific key is there with PHP

Question

I have an array that looks something like this:

Array
(
    [100] => Array
        (
            [room_id] => 100
            [name] => Town Center
             


        

Answer 1

Easy use the PHP function array_key_exists

You may have to go through a foreach loop since you are using a multidimensional array:

$names = [];
foreach($array as $e)
{
  if(array_key_exists('pin_id', $e)) {
        echo "The 'pin_id' element is in the array";
      $names[] = $e['name'];
  }
}

And now $names include all you names values

Answer 2

function search_key( $array, $key ) {
    $results = array();
    if ( is_array( $array ) ) {
        if ( isset( $array[$key] ) && $array[$key] == $key )
            $results[] = $array;
        foreach ( $array as $subarray )
            $results = array_merge( $results, tm_search_key_value( $subarray, $key ) );
    }
    return $results;
}

USAGE:

search_key( $array, 'pin_id');

Search specific KEY from Multidimentional, It will return array of that specific key.

Answer 3

foreach ($your_big_array as $arr) {
    if ($arr['pin_id'] == 'some_value') $i_need_this = $arr['name'];
}