How can the code be optimized to only perform a certain action on specific values within the array?

To optimize the code to only perform a certain action on specific values within an array, you can use conditional statements to check for those specific values before executing the action. This way, unnecessary iterations through the entire array can be avoided, improving the efficiency of the code.

// Example code snippet
$array = [1, 2, 3, 4, 5];

foreach ($array as $value) {
    if ($value % 2 == 0) {
        // Perform a specific action only on even values
        echo $value . " is even." . PHP_EOL;
    }
}