PHP: Retrieving Array Keys in Foreach Loop

In PHP, iterating over an associative array using the foreach loop provides access to both the values and keys. However, the key() function only returns the current value's key, which can be insufficient when working with nested arrays.

For instance, consider an array like this:

 array('value1' => 52, 'value2' => 46),
    4922 => array('value1' => 22, 'value2' => 47),
    7522 => array('value1' => 47, 'value2' => 85)
);
?>

If you attempt to use key($item) in a foreach loop to retrieve the parent key, you may encounter unexpected results:

" . key($item) . "";
    echo "" . $samplearr['value1'] . "";
    echo "" . $samplearr['value2'] . "";
}
?>

This code only returns the value keys: value1 and value2.

To access the parent keys, you can use the following approach in the foreach loop:

 $item) {
    echo "" . $key . "";
    echo "" . $item['value1'] . "";
    echo "" . $item['value2'] . "";
}
?>

By using $key, the loop iterates over the parent keys, allowing you to access and print both the parent and child values as desired.