Get key of multidimensional array?

Question

For example, I have multidimensional array as below:

$array = array (
  0 => 
    array (
      \'id\' => \'9\',
      \'gallery_id\' => \'2\',
             


        

Answer 1

Probably http://php.net/manual/en/function.array-keys.php ?

Convert your double dimensional array on your own:

$tmp = null
foreach($array as $key => $value) {
  $tmp[] = $key;
}

print_r($tmp);

Answer 2

sometimes it is to easy to find ;)

array_keys($array);

array_keys

Answer 3

This is quite simple, you just need to use array_keys():

$keys = array_keys($array);

See it working

EDIT For your search task, this function should do the job:

function array_search_inner ($array, $attr, $val, $strict = FALSE) {
  // Error is input array is not an array
  if (!is_array($array)) return FALSE;
  // Loop the array
  foreach ($array as $key => $inner) {
    // Error if inner item is not an array (you may want to remove this line)
    if (!is_array($inner)) return FALSE;
    // Skip entries where search key is not present
    if (!isset($inner[$attr])) continue;
    if ($strict) {
      // Strict typing
      if ($inner[$attr] === $val) return $key;
    } else {
      // Loose typing
      if ($inner[$attr] == $val) return $key;
    }
  }
  // We didn't find it
  return NULL;
}

// Example usage
$key = array_search_inner($array, 'id', 9);

The fourth parameter $strict, if TRUE, will use strict type comparisons. So 9 will not work, you would have to pass '9', since the values are stored as strings. Returns the key of the first occurence of a match, NULL if the value is not found, or FALSE on error. make sure to use a strict comparison on the return value, since 0, NULL and FALSE are all possible return values and they will all evaluate to 0 if using loose integer comparisons.

Answer 4

You mean something like this:

function getKeys($array)
{
    $resultArr = array();
    foreach($array as $subArr) {
        $resultArr = array_merge($resultArr, $subArr);
    }        
    return array_keys($resultArr);
}

Answer 5

Try this , I think it will help you.

foreach ($array as $key=>$value)
{
    echo $key.'<br/>';

    echo $value['id'].'<br/>';
    echo $value['gallery_id'].'<br/>';
    echo $value['picture'].'<br/><br/>';
}