PHP - get all keys from a array that start with a certain string

Question

I have an array that looks like this:

array(
  \'abc\' => 0,
  \'foo-bcd\' => 1,
  \'foo-def\' => 1,
  \'foo-xyz\' => 0,
  // ...
)

Answer 1

Simply I used array_filter function to achieve the solution as like follows

 0,
    'foo-bcd' => 1,
    'foo-def' => 1,
    'foo-xyz' => 0,
);

$filtered = array_filter($input, function ($key) {
    return strpos($key, 'foo-') === 0;
}, ARRAY_FILTER_USE_KEY);

print_r($filtered);

Output

Array
(
    [foo-bcd] => 1
    [foo-def] => 1
    [foo-xyz] => 0
)

For live check https://3v4l.org/lJCse