The "once" Laravel Helper Function

Introducing the "once" helper function, a powerful addition to your toolkit contributed by the brilliant minds of Taylor Otwell and Nuno Maduro .

The "once" helper simplifies caching and optimizing your code by executing a given callback and storing its result in memory for the duration of the request. Subsequent calls to the same callback with the "once" function will seamlessly return the cached result, enhancing efficiency and performance.

Take a look at an example showcasing how "once" can streamline your code and optimize performance:

function fetchData(): array
{
    return once(function () {
        // Simulating fetching data from a database or API
        return [
            'user' => 'John Doe',
            'age' => 30,
            'email' => '[email protected]'
        ];
    });
}

$data = fetchData(); // Fetches data
$data = fetchData(); // Retrieves cached result
$data = fetchData(); // Retrieves cached result        

In this example, "fetchData" fetches data from a source (simulated here), and subsequent calls to the function return the cached result, eliminating redundant data fetching operations.

Let's dive into more examples to unveil its versatility and efficiency!

1. Dynamic Content Generation:

function generateDynamicContent($id): string
{
    return once(function () use ($id) {
        // Simulating dynamic content generation based on ID
        return "Dynamic content for ID: $id";
    });
}

$content1 = generateDynamicContent(123); // Generates content
$content2 = generateDynamicContent(123); // Retrieves cached result
$content3 = generateDynamicContent(456); // Generates content for a different ID        

2. Expensive Calculation:

function calculateExpensiveOperation(): float
{
    return once(function () {
        // Simulating an expensive calculation
        return 3.14 * 2.71; // Example calculation
    });
}

$result1 = calculateExpensiveOperation(); // Performs calculation
$result2 = calculateExpensiveOperation(); // Retrieves cached result        

3. Random Number:

function random(): int
{
    return once(function () {
        return random_int(1, 1000);
    });
}
 
random(); // 123
random(); // 123 (cached result)
random(); // 123 (cached result)        

Interested in leveraging this game-changing helper? Dive into our

to explore more! ??

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