polyfill-php80

Symfony polyfill backporting some PHP 8.0+ features to lower PHP versions

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Quick Overview

The symfony/polyfill-php80 is a PHP library that provides polyfills for PHP 8.0 features. It allows developers to use PHP 8.0 functions and classes in projects running on older PHP versions, ensuring better compatibility and easier migration to PHP 8.0.

Pros

Enables the use of PHP 8.0 features in older PHP versions
Simplifies the process of upgrading projects to PHP 8.0
Maintained by the Symfony community, ensuring reliability and regular updates
Lightweight and easy to integrate into existing projects

Cons

May introduce a slight performance overhead compared to native PHP 8.0 implementations
Not a complete replacement for upgrading to PHP 8.0
Requires additional maintenance when updating PHP versions
Some complex PHP 8.0 features may not be fully polyfilled

Code Examples

Using the str_contains function:

use Symfony\Polyfill\Php80\Php80;

$haystack = "Hello, World!";
$needle = "World";

if (Php80::str_contains($haystack, $needle)) {
    echo "The string contains 'World'";
}

Utilizing the fdiv function for float division:

use Symfony\Polyfill\Php80\Php80;

$result = Php80::fdiv(10, 3);
echo "Result of 10 / 3: " . $result;

Implementing the ValueError exception:

use Symfony\Polyfill\Php80\ValueError;

function divide($a, $b) {
    if ($b === 0) {
        throw new ValueError("Division by zero");
    }
    return $a / $b;
}

try {
    divide(10, 0);
} catch (ValueError $e) {
    echo "Error: " . $e->getMessage();
}

Getting Started

To use symfony/polyfill-php80 in your project, follow these steps:

Install the library using Composer:

composer require symfony/polyfill-php80

Include the Composer autoloader in your PHP file:

require_once 'vendor/autoload.php';

Use the polyfilled functions and classes as needed in your code:

use Symfony\Polyfill\Php80\Php80;

$result = Php80::str_contains("Hello, World!", "World");

Competitor Comparisons

safe

2,374

All PHP functions, rewritten to throw exceptions instead of returning false

Pros of Safe

Provides type-safe wrappers for PHP functions, reducing runtime errors
Offers comprehensive coverage of PHP's standard library functions
Includes static analysis tools for improved code quality

Cons of Safe

Requires additional setup and configuration compared to polyfill-php80
May have a slight performance overhead due to wrapper functions
Less focused on specific PHP version compatibility

Code Comparison

Safe:

use function Safe\file_get_contents;

$content = file_get_contents('file.txt');
// No need for error checking, throws exception on failure

polyfill-php80:

$content = @file_get_contents('file.txt');
if ($content === false) {
    throw new \RuntimeException('Failed to read file');
}

Key Differences

Safe focuses on type safety and error handling, while polyfill-php80 provides compatibility for PHP 8.0 features
polyfill-php80 is more lightweight and specifically targets PHP version differences
Safe offers a broader range of function wrappers and additional tools for code quality

Use Cases

Choose Safe for projects prioritizing type safety and reduced runtime errors
Opt for polyfill-php80 when needing PHP 8.0 features in older PHP versions or for minimal overhead

Community and Maintenance

Both projects are actively maintained and have strong community support
Safe has more frequent updates and a larger contributor base
polyfill-php80 is part of the widely-used Symfony ecosystem

random_compat

8,169

PHP 5.x support for random_bytes() and random_int()

Pros of random_compat

Focused specifically on providing secure random number generation
Offers a more comprehensive set of random number functions
Actively maintained with regular updates and security patches

Cons of random_compat

Limited to random number generation functionality
May require additional polyfills for other PHP 7+ features
Slightly larger file size due to its specialized focus

Code Comparison

random_compat:

$bytes = random_bytes(32);
$integer = random_int(1, 100);

polyfill-php80:

$str = preg_replace('/[^a-z]/i', '', $str);
$array = array_combine($keys, $values);

Summary

While random_compat excels in providing secure random number generation for older PHP versions, polyfill-php80 offers a broader range of PHP 8.0 features. random_compat is ideal for projects requiring robust randomness, while polyfill-php80 is better suited for general PHP 8.0 compatibility in older environments. The choice between them depends on the specific needs of your project and the PHP features you require.