How to Access First Level Keys of a 2D Array Using a Foreach Loop?

Accessing the First Level Keys of a 2D Array Using a Foreach Loop

To obtain the city names in the $places array, you can access the first level keys. A straightforward method is through a foreach loop.

In your PHP code:

<code class="php">foreach ($places as $city => $sites) {
    echo "<h5>{$city}</h5>";

    foreach ($sites as $site) {
        echo "<h6>{$site['place_name']}</h6>";
    }
}</code>

This code iterates over the keys of the outer array, which are the city names. Within the inner loop, it accesses the first level keys as $city. By using =>, you assign both the key and value to the corresponding variables, allowing you to access the city name directly as $city.

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