1. <?php
  3. class FormPerformance {
  5. private $formName;
  6. private $requestCount = 0;
  7. private $lastRequestTime = 0;
  8. private $rateLimit = 10; // Requests per minute
  9. private $lockFile = 'form_lock.lock'; // File to prevent race conditions
  11. public function __construct($formName, $rateLimit = 10) {
  12. $this->formName = $formName;
  13. $this->rateLimit = $rateLimit;
  14. }
  16. public function isAllowed() {
  17. //Check if rate limit is exceeded
  18. if (file_exists($this->lockFile)) {
  19. return false; //Rate limit exceeded
  20. }
  22. $currentTime = time();
  23. $timeDelta = $currentTime - $this->lastRequestTime;
  25. if ($timeDelta > 60) {
  26. $this->requestCount = 0;
  27. }
  29. if ($this->requestCount >= $this->rateLimit) {
  30. return false; //Rate limit exceeded
  31. }
  33. $this->requestCount++;
  34. $this->lastRequestTime = $currentTime;
  35. return true; //Request allowed
  36. }
  38. public function incrementRequestCount() {
  39. file_put_contents($this->lockFile, time()); //Prevent race conditions
  40. $this->requestCount++;
  41. file_put_contents($this->lockFile, time()); //Prevent race conditions
  42. }
  44. public function resetRequestCount() {
  45. unlink($this->lockFile);
  46. $this->requestCount = 0;
  47. }
  48. }
  51. //Example usage:
  52. /*
  53. $form = new FormPerformance('contact_form', 5); //Rate limit to 5 requests per minute
  55. if ($form->isAllowed()) {
  56. //Process the form data
  57. echo "Form submitted successfully!";
  58. $form->incrementRequestCount();
  59. } else {
  60. echo "Rate limit exceeded. Please try again later.";
  61. $form->resetRequestCount();
  62. }
  63. */
  66. ?>

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