How Can I Efficiently Flatten a Multidimensional Array in PHP?

Converting Multidimensional Array to Single Array

You have a multidimensional array that appears unnecessarily complex and you desire to flatten it into a single array. An efficient solution to this problem exists.

The array_column function, which is built into PHP, can help you achieve this task. It takes two arguments: the input array and the key name (or array of keys) to extract. In your case, you want to extract the plan key and create a new array based solely on it.

The code to implement this is straightforward:

$array = array_column($array, 'plan');

The result will be a single array, as desired:

print_r($array);

// Output:
// Array
// (
//     [0] => basic
//     [1] => small
//     [2] => novice
//     [3] => professional
//     [4] => master
//     [5] => promo
//     [6] => newplan
// )

For more information on the array_column function and its usage, refer to the official PHP documentation: https://www.php.net/manual/en/function.array-column.php.

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