1. <?php
  3. /**
  4. * Collects metrics on user input.
  5. *
  6. * This script gathers data like input length, type, and potential errors
  7. * for internal tooling. It avoids external libraries for simplicity.
  8. */
  10. // Function to record a metric
  11. function recordMetric(string $metricName, mixed $value) {
  12. global $metrics; // Access the global metrics array
  13. $metrics[$metricName][] = $value;
  14. }
  16. // Array to store metrics
  17. $metrics = [];
  19. // Function to collect input metrics
  20. function collectInputMetrics(string $inputName, string $userInput): void {
  21. global $metrics;
  23. // Data validation (example)
  24. if (empty($userInput)) {
  25. recordMetric("input_empty", true); // Record if input is empty
  26. return;
  27. }
  29. // Input length
  30. $inputLength = strlen($userInput);
  31. recordMetric("input_length_" . $inputName, $inputLength);
  33. // Input type (basic check) - could be improved with regular expressions
  34. if (ctype_digit($userInput)) {
  35. recordMetric("input_type_" . $inputName, "numeric");
  36. } elseif (ctype_alpha($userInput)) {
  37. recordMetric("input_type_" . $inputName, "alphabetic");
  38. } else {
  39. recordMetric("input_type_" . $inputName, "alphanumeric");
  40. }
  42. // Potential error detection (example)
  43. if (strpos($userInput, "<script") !== false) {
  44. recordMetric("input_contains_script_" . $inputName, true);
  45. }
  47. // Optionally, record the raw input (be mindful of sensitive data)
  48. // recordMetric("raw_input_" . $inputName, $userInput);
  49. }
  52. // Example usage (Simulate user input – replace with your actual input source)
  53. $input1 = $_POST['username'] ?? ''; // Example: Retrieve username from POST data
  54. $input2 = $_POST['email'] ?? ''; // Example: Retrieve email from POST data
  55. $input3 = $_POST['age'] ?? ''; // Example: Retrieve age from POST data
  59. collectInputMetrics("username", $input1);
  60. collectInputMetrics("email", $input2);
  61. collectInputMetrics("age", $input3);
  65. // Output the collected metrics (for debugging/tooling)
  66. echo "<pre>";
  67. print_r($metrics);
  68. echo "</pre>";
  70. ?>

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