PHP code example of krugozor / cover

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

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

    

krugozor / cover example snippets

// Data: users with age and status
// Task: get names of active users over 18, sorted by descending score
$users = [
    ['name' => 'Alice', 'age' => 25, 'active' => true, 'score' => 85],
    ['name' => 'Bob', 'age' => 17, 'active' => false, 'score' => 45],
    ['name' => 'Charlie', 'age' => 32, 'active' => true, 'score' => 92],
    ['name' => 'Diana', 'age' => 19, 'active' => true, 'score' => 78],
    ['name' => 'Eve', 'age' => 22, 'active' => false, 'score' => 61],
];

$filtered = array_filter($users, fn($u) => $u['active'] && $u['age'] >= 18);
$sorted = usort($filtered, fn($a, $b) => $b['score'] <=> $a['score']) ? $filtered : [];
$names = array_column($sorted, 'name');
$result = implode(', ', $names); // Charlie, Alice, Diana

// EVERYTHING IN ONE LINE!
$result = CoverArray::fromArray($users)
    ->filter(fn($u) => $u->active && $u->age >= 18)
    ->usort(fn($a, $b) => $b->score <=> $a->score)
    ->values()
    ->column('name')
    ->implode(', '); // Charlie, Alice, Diana

// Load and access nested configuration safely
$config = CoverArray::fromJson(file_get_contents('config.json'));

// Direct nested access with default fallbacks
$dbHost = $config->get('database.connections.mysql.host', fn($value) => $value ?? 'localhost');
$dbPort = $config->get('database.connections.mysql.port', fn($value) => $value ?? 3306);

// Access with callback for complex defaults
$apiKeys = $config->get('services.payment.keys', function($keys) {
    return $keys ?? CoverArray::fromArray([
        'public' => 'default_public_key',
        'secret' => 'default_secret_key'
    ]);
});

// Real-world API processing: filter, transform, and extract data
$apiResponse = CoverArray::fromJson($httpResponse)
    ->get('data.users', function (mixed $users): CoverArray {
        if ($users === null) {
            return new CoverArray();
        }

        /** @var CoverArray $users */
        return $users
            ->filter(fn($u) => $u['active'] == '1' && $u['email_verified'])
            ->map(fn($u) => [
                'id' => $u['id'],
                'name' => $u['first_name'] . ' ' . $u['last_name'],
                'email' => strtolower($u['email']),
                'role' => $u['role'] ?? 'user'
            ])
            ->usort(fn($a, $b) => $a['name'] <=> $b['name']);
    });

// Extract specific columns for dropdown
$userOptions = $apiResponse->column('name', 'id')->getDataAsArray();

// Parse application logs and extract error patterns
$logLines = CoverArray::fromExplode("\n", file_get_contents('app.log'))
    ->filter(fn($line) => !empty(trim($line)));

// Extract and categorize errors
$errors = $logLines
    ->filter(fn($line) => str_contains($line, 'ERROR'))
    ->map(function($line) {
        preg_match('/\[(.*?)\].*ERROR:\s*(\w+)\s*-\s*(.*)/', $line, $matches);
        return [
            'timestamp' => $matches[1] ?? 'Unknown',
            'type' => $matches[2] ?? 'General',
            'message' => $matches[3] ?? $line
        ];
    });

// Group by error type and count occurrences
$errorStats = $errors
    ->column('type')
    ->countValues()
    ->arsort(); // Sort by frequency

// Generate error report
$report = "Error Report:\n";
foreach ($errorStats as $type => $count) {
    $report .= "- {$type}: {$count} occurrences\n";
}

// Find most recent critical error
$lastCritical = $errors
    ->filter(fn($e) => $e['type'] === 'Critical')
    ->last();