Jeremy Jeremy - 1 year ago 49
PHP Question

Flip key/value pairs from an existing array into an associate array which allows for keys with multiple values in PHP

I need to basically flip an existing associate array into another associate array. It needs to contain the keys from the previous array as values and the values of the previous array as keys. Also, it needs to be able to contain multiple values for a single key.


class Owner {
public static function groupOwners($array)
//insert code
$array = array(
"Input.txt" => "Bob",
"" => "Steve",
"Output.txt" => "Bob"

The output generated is to be:

["Bob"] => ["Input.txt, Output.txt"], ["Steve"] => [""]

Answer Source

You didn't show an attempt but I'm bored:

foreach($array as $key => $val) {
    $result[$val][] = $key;