PHP How to display array values with text "even" to be displayed for even index values

In PHP, you can display array values with the text "even" for even index positions using a for loop with conditional logic. This technique checks if an index is divisible by 2 and assigns "Even" text or the actual value accordingly.

Example

The following example creates an array and displays "Even" for even index values ?

<?php
    $arrayList = [];
    for ($counter = 0; $counter < 5; $counter++) {
        ($counter % 2 == 0) ? ($arrayList[] = "Even") : ($arrayList[] = $counter);
    }
    for ($counter = 0; $counter < 5; $counter++) {
        echo $arrayList[$counter] . " ";
    }
?>

Even 1 Even 3 Even

How It Works

The code uses the modulo operator (%) to check if an index is even. When $counter % 2 == 0 is true (for indices 0, 2, 4), it assigns "Even" to the array. For odd indices (1, 3), it assigns the actual counter value.

Alternative Approach

You can also use an if−else statement for better readability ?

<?php
    $arrayList = [];
    for ($counter = 0; $counter < 5; $counter++) {
        if ($counter % 2 == 0) {
            $arrayList[] = "Even";
        } else {
            $arrayList[] = $counter;
        }
    }
    
    foreach ($arrayList as $value) {
        echo $value . " ";
    }
?>

Even 1 Even 3 Even

Conclusion

Using the modulo operator with conditional statements allows you to easily identify and replace even index values with custom text while preserving odd index values in PHP arrays.