Search array and return multiple matches [duplicate]

Question

For example if I am searching for a key with a value 5 in my array $cake, I could use the following code:

$cake = array("a"=>6,"b"=>5,"c"=>6);
echo array_search(5, $cake, true); // returns "b";

But if my $cake array contains multiple matches, only the first match is returned:

$cake = array("a"=>6,"b"=>5,"c"=>5,"d"=>5,"e"=>5);
echo array_search(5, $cake, true); // returns "b";

How can I return multiple matches as an array? Like this:

$cake = array("a"=>6,"b"=>5,"c"=>5,"d"=>5,"e"=>5);
// return array("b","c","d","e");

Answer 1

As noted in the docs:

If needle is found in haystack more than once, the first matching key is returned. To return the keys for all matching values, use array_keys() with the optional search_value parameter instead.

print_r(array_keys($cake, 5, true));