Convert multidimensional array into single array

Question

I have an array which is multidimensional for no reason

/* This is how my array is currently */
Array
(
[0] => Array
    (
        [0] => Array
                


        

Answer 1

Following this pattern

$input = array(10, 20, array(30, 40), array('key1' => '50', 'key2'=>array(60), 70));

Call the function :

echo "
";print_r(flatten_array($input, $output=null));


Function Declaration : 

function flatten_array($input, $output=null) {
if($input == null) return null;
if($output == null) $output = array();
foreach($input as $value) {
    if(is_array($value)) {
        $output = flatten_array($value, $output);
    } else {
        array_push($output, $value);
    }
}
return $output;


}