1. <?php
  3. /**
  4. * Loads message queue resources for staging environments with older version support.
  5. *
  6. * This function dynamically loads the appropriate message queue drivers based on
  7. * the environment configuration. It prioritizes older, compatible drivers if
  8. * newer ones are unavailable or if the application is running on an older PHP version.
  9. *
  10. * @return array An array containing the configured message queue drivers. Returns an empty array on failure.
  11. */
  12. function loadMessageQueueResources() {
  14. // Determine the environment. Replace with your actual environment detection logic.
  15. $environment = getEnvironment(); // Example: "staging"
  17. // Define available message queue drivers and their compatibility information.
  18. $drivers = [
  19. 'redis' => [
  20. 'version' => '>=5.0',
  21. 'class' => 'Predis\Client',
  22. 'description' => 'Redis client',
  23. 'dependencies' => ['predis/predis'],
  24. ],
  25. 'amqplib' => [
  26. 'version' => '>=3.0',
  27. 'class' => 'Amqp\Broker',
  28. 'description' => 'AMQP client',
  29. 'dependencies' => ['amqplib/amqplib'],
  30. ],
  31. 'RabbitMQ' => [
  32. 'version' => '>=3.0',
  33. 'class' => 'Pheanstalk\Pheanstalk',
  34. 'description' => 'RabbitMQ client',
  35. 'dependencies' => ['pheanstalk/pheanstalk'],
  36. ],
  37. 'legacy_redis' => [ // Older version compatibility
  38. 'version' => '<5.0',
  39. 'class' => 'phpredis', // Older redis extension
  40. 'description' => 'Legacy Redis client (phpredis)',
  41. 'dependencies' => ['phpredis'],
  42. ]
  43. ];
  46. // Select the appropriate driver based on the environment and PHP version.
  47. $selectedDriver = [];
  48. if ($environment === 'staging') {
  49. // Check for newer drivers first
  50. foreach ($drivers as $driverName => $driverInfo) {
  51. if (version_compare(phpversion(), $driverInfo['version'], '>=')) {
  52. $selectedDriver = $driverInfo;
  53. break;
  54. }
  55. }
  57. // If newer drivers are not available, fall back to a legacy driver
  58. if (empty($selectedDriver)) {
  59. $selectedDriver = $drivers['legacy_redis'];
  60. }
  61. }
  63. //Return the selected driver information.
  64. return $selectedDriver;
  65. }
  67. /**
  68. * Placeholder for environment detection. Replace with your actual implementation.
  69. *
  70. * @return string The current environment (e.g., "staging", "development", "production").
  71. */
  72. function getEnvironment() {
  73. // Replace with your environment detection logic.
  74. // For example, read an environment variable:
  75. $env = getenv('ENVIRONMENT');
  76. return $env ?: 'development'; // Default to development if not set.
  77. }
  80. // Example usage:
  81. $queueResources = loadMessageQueueResources();
  83. if (!empty($queueResources)) {
  84. echo "Loaded Message Queue Resources:\n";
  85. print_r($queueResources);
  86. } else {
  87. echo "No message queue resources found for this environment.\n";
  88. }
  91. ?>

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