PHP: Find the index key of a foreach loop.

In this tutorial, we will show you how to find the current index key of a foreach loop in PHP.

Let’s loop through an array and print out the key of the current element:

//Example array
$fruits = array(
    0 => 'Apple',
    1 => 'Bananna',
    2 => 'Pear'
);

//Loop through the array
foreach($fruits as $key => $value){
    //Print the index
    echo "The key/index of $value is: $key 
";
}

If you run the PHP code above, it will print out the following:

As you can see, the key variable in the foreach loop will always contain the key of the current element.

This will also work with associative arrays:

$carDetails = array(
    'make' => 'Honda',
    'mode' => 'Civic',
    'year' => '2023'
);

foreach($carDetails as $key => $value){
    echo "$key: $value <br>";
}

The example above will result in the following:

As you can see, it doesn’t matter if the key is numeric or not.