Array_filter convert an indexed array to an associative array

Question

I have an indexed array that contains several associative arrays and I use simple

$my_arr = array_filter($my_arr, function($obj) {
    return $obj["value"] < 100;
});

to filter some elements of the array.

This started to make Angular front end error in strange ways, so after a few minutes I found that it was being $my_arrconverted from an indexed array to an associative array.

• Is this expected behavior in array_filter?
• How can I say array_filterthat I want an indexed array?

EDIT: as requested in the comments, mine $my_arr:

$my_arr = [
    ["foo" => "bar", "value" => 10],
    ["foo" => "var", "value" => 30],
    ["foo" => "car", "value" => 440],
    ["foo" => "dar", "value" => 700]
]

EDIT: A real world instance from my code:

$media = [
    "photos" => [
        ["foo" => "bar", "value" => 10],
        ["foo" => "var", "value" => 20],
        ["foo" => "car", "value" => 50],
    ]
];

echo json_encode($media);
echo "\n\n";

$media["photos"] = array_filter($media["photos"], function($photo) {
    return $photo["value"] > 15;
});

echo json_encode($media); 

Conclusion:

{"photos":[{"foo":"bar","value":10},{"foo":"var","value":20},{"foo":"car","value":50}]}

{"photos":{"1":{"foo":"var","value":20},"2":{"foo":"car","value":50}}}

Expected Result:

{"photos":[{"foo":"bar","value":10},{"foo":"var","value":20},{"foo":"car","value":50}]}

{"photos":[{"foo":"var","value":20},{"foo":"car","value":50}]}

Answer 1

- PHP. , array_filter() key/value . , :

$my_arr = array_values(array_filter($my_arr, function($obj) {
    return $obj["value"] < 100;
}));