arrays - How to get the key name in PHP?

This question already has answers here:

Answer

Solution:

There are two syntaxes for foreach

foreach (iterable_expression as $value)
    statement

foreach (iterable_expression as $key => $value)
    statement

From php.net,

The first form traverses the iterable given by iterable_expression. On each iteration, the value of the current element is assigned to $value.

The second form will additionally assign the current element's key to the $key variable on each iteration.

I would rewrite your code like this

printEach($movies);

function printEach($array) {
  echo "<br><br>";
  foreach ($array as $key => $value) {
    echo $key;
    if (is_array($value)) {
       printEach($value); // Recursive
    } else {
      echo " - ".$value."<br><br>";
    }
  }
}

Answer

Solution:

You can use the key syntax in the for each loop

foreach ($movies as $genreName => $genres) {
    echo "$genreName <br>";

    while (list ($index, $array) = each ($genres)) {
        echo "Movie number: $index <br>";
    
        while (list ($k, $v) = each ($array)) {
            echo "$k - $v <br>";
        }
        echo "<br>";
    }
    echo "<br>";
}

Source