1. <?php
  3. /**
  4. * Searches for text within HTML documents. Supports older PHP versions.
  5. *
  6. * @param string $html The HTML content to search.
  7. * @param string $search_term The text to search for.
  8. * @param bool $case_sensitive Whether the search should be case-sensitive. Defaults to false.
  9. * @param bool $use_regex Whether to use regular expressions. Defaults to false.
  10. * @return array An array of matches, where each element is an array containing the matched text and its position.
  11. */
  12. function search_html_content(string $html, string $search_term, bool $case_sensitive = false, bool $use_regex = false): array
  13. {
  14. $results = [];
  16. if ($use_regex) {
  17. if ($case_sensitive) {
  18. preg_match_all('/' . preg_quote($search_term, '/') . '/', $html, $matches);
  19. } else {
  20. preg_match_all('/' . preg_quote($search_term, '/') . '/i', $html, $matches);
  21. }
  22. } else {
  23. if ($case_sensitive) {
  24. $pos = strpos($html, $search_term);
  25. while ($pos !== false) {
  26. $results[] = ['text' => substr($html, $pos, strlen($search_term)), 'position' => $pos];
  27. $pos = strpos($html, $search_term, $pos + strlen($search_term));
  28. }
  29. } else {
  30. $pos = strpos($html, strtolower($search_term), 0);
  31. while ($pos !== false) {
  32. $results[] = ['text' => substr($html, $pos, strlen($search_term)), 'position' => $pos];
  33. $search_term = strtolower($search_term);
  34. $pos = strpos($html, strtolower($search_term), $pos + strlen($search_term));
  35. }
  36. }
  37. }
  39. return $results;
  40. }
  44. /**
  45. * Example Usage (for testing)
  46. */
  48. if(isset($_GET['search'])) {
  49. $html = $_GET['html'];
  50. $search_term = $_GET['search'];
  51. $case_sensitive = isset($_GET['case_sensitive']) ? $_GET['case_sensitive'] == 'true' : false;
  52. $use_regex = isset($_GET['use_regex']) ? $_GET['use_regex'] == 'true' : false;
  54. $results = search_html_content($html, $search_term, $case_sensitive, $use_regex);
  56. echo "<pre>";
  57. print_r($results);
  58. echo "</pre>";
  59. }
  61. ?>

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