PHP code example of mahdi-mh / fallback-chain

    
        
<?php
require_once('vendor/autoload.php');

/* Start to develop here. Best regards https://php-download.com/ */

    

mahdi-mh / fallback-chain example snippets

use MahdiMh\FallbackChain\FallbackChain;
use MahdiMh\FallbackChain\Stage;
use MahdiMh\FallbackChain\AllStagesFailedException;

$context = [
    'to'   => '09121234567',
    'text' => 'Hello, this is a test message',
];

$chain = new FallbackChain($context);

$chain
    ->add(Stage::handler(function ($ctx) {
        return SmsProvider1::send($ctx['to'], $ctx['text']);
    })->onFailure(function (\Throwable $e, $ctx) {
        error_log('SMS Provider 1 failed: ' . $e->getMessage());
    }))

    ->add(Stage::handler(function ($ctx) {
        return SmsProvider2::send($ctx['to'], $ctx['text']);
    }))

    ->add(Stage::handler(function ($ctx) {
        return SmsProvider3::send($ctx['to'], $ctx['text']);
    })->onFailure(function (\Throwable $e, $ctx) {
        error_log('Provider 3 unavailable: ' . $e->getMessage());
    }));

try {
    $result = $chain->execute();
    echo "Message sent successfully: " . $result;
} catch (AllStagesFailedException $e) {
    echo "All providers failed.";

    // Access all exceptions that occurred
    foreach ($e->getExceptions() as $exception) {
        error_log($exception->getMessage());
    }
}

// Stage with just a handler
$stage = Stage::handler(function ($context) {
    return doSomething($context);
});

// Stage with handler and failure callback
$stage = Stage::handler(function ($context) {
    return doSomething($context);
})->onFailure(function (\Throwable $e, $context) {
    // Log, send metrics, cleanup, etc.
});

try {
    $chain->execute();
} catch (AllStagesFailedException $e) {
    $exceptions = $e->getExceptions();

    foreach ($exceptions as $index => $exception) {
        echo "Stage {$index} failed: " . $exception->getMessage() . "\n";
    }
}