1. <?php
  3. /**
  4. * Teardown function for environment variables.
  5. *
  6. * This function iterates through a predefined list of environment variables
  7. * and attempts to unset them. Includes error handling for cases where
  8. * the variable doesn't exist or unsetting fails.
  9. *
  10. * @param array $envVars An array of environment variable names to unset.
  11. * @return bool True on success, false on failure.
  12. */
  13. function teardownEnvironmentVariables(array $envVars): bool
  14. {
  15. $success = true;
  17. foreach ($envVars as $varName) {
  18. // Attempt to unset the environment variable.
  19. if (getenv($varName) !== false) { // Check if the variable exists
  20. unset($_ENV[$varName]); // Unset the variable from $_ENV (internal).
  21. // Optionally, unset from $_SERVER as well if needed.
  22. //unset($_SERVER[$varName]);
  23. } else {
  24. // Variable doesn't exist, log a warning (optional).
  25. error_log("teardownEnvironmentVariables: Variable '$varName' not found.");
  26. // Consider continuing to the next variable to avoid stopping the process.
  27. }
  28. }
  30. return $success;
  31. }
  36. //Example Usage (for testing)
  37. /*
  38. $varsToUnset = ['MY_INTERNAL_VAR', 'ANOTHER_VAR'];
  39. $result = teardownEnvironmentVariables($varsToUnset);
  41. if ($result) {
  42. echo "Environment variables teardown successful.\n";
  43. } else {
  44. echo "Environment variables teardown failed.\n";
  45. }
  46. */
  48. ?>

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