Skouter mortgage estimates. Web application with view written in PHP and Vue, but controller and models in Go.
Nie możesz wybrać więcej, niż 25 tematów Tematy muszą się zaczynać od litery lub cyfry, mogą zawierać myślniki ('-') i mogą mieć do 35 znaków.
 
 
 
 
 
 

123 wiersze
3.7 KiB

  1. <?php
  2. namespace Grav\Plugin\Form;
  3. use GdImage;
  4. use Grav\Common\Grav;
  5. class BasicCaptcha
  6. {
  7. protected $session = null;
  8. protected $key = 'basic_captcha_code';
  9. public function __construct()
  10. {
  11. $this->session = Grav::instance()['session'];
  12. }
  13. public function getCaptchaCode($length = null): string
  14. {
  15. $config = Grav::instance()['config']->get('plugins.form.basic_captcha');
  16. $type = $config['type'] ?? 'characters';
  17. if ($type == 'math') {
  18. $min = $config['math']['min'] ?? 1;
  19. $max = $config['math']['max'] ?? 12;
  20. $operators = $config['math']['operators'] ?? ['+','-','*'];
  21. $first_num = random_int($min, $max);
  22. $second_num = random_int($min, $max);
  23. $operator = $operators[array_rand($operators)];
  24. // calculator
  25. if ($operator === '-') {
  26. if ($first_num < $second_num) {
  27. $result = "$second_num - $first_num";
  28. $captcha_code = $second_num - $first_num;
  29. } else {
  30. $result = "$first_num-$second_num";
  31. $captcha_code = $first_num - $second_num;
  32. }
  33. } elseif ($operator === '*') {
  34. $result = "{$first_num} x {$second_num}";
  35. $captcha_code = $first_num * $second_num;
  36. } elseif ($operator === '/') {
  37. $result = "$first_num / second_num";
  38. $captcha_code = $first_num / $second_num;
  39. } elseif ($operator === '+') {
  40. $result = "$first_num + $second_num";
  41. $captcha_code = $first_num + $second_num;
  42. }
  43. } else {
  44. if ($length === null) {
  45. $length = $config['chars']['length'] ?? 6;
  46. }
  47. $random_alpha = md5(random_bytes(64));
  48. $captcha_code = substr($random_alpha, 0, $length);
  49. $result = $captcha_code;
  50. }
  51. $this->setSession($this->key, $captcha_code);
  52. return $result;
  53. }
  54. public function setSession($key, $value): void
  55. {
  56. $this->session->$key = $value;
  57. }
  58. public function getSession($key = null): ?string
  59. {
  60. if ($key === null) {
  61. $key = $this->key;
  62. }
  63. return $this->session->$key ?? null;
  64. }
  65. public function createCaptchaImage($captcha_code)
  66. {
  67. $config = Grav::instance()['config']->get('plugins.form.basic_captcha');
  68. $font = $config['chars']['font'] ?? 'zxx-xed.ttf';
  69. $target_layer = imagecreatetruecolor($config['chars']['box_width'], $config['chars']['box_height']);
  70. $bg = $this->hexToRgb($config['chars']['bg'] ?? '#ffffff');
  71. $text = $this->hexToRgb($config['chars']['text'] ?? '#000000');
  72. $captcha_background = imagecolorallocate($target_layer, $bg[0], $bg[1], $bg[2]);
  73. $captcha_text_color = imagecolorallocate($target_layer, $text[0], $text[1], $text[2]);
  74. $font_path = __DIR__ . '/../fonts/' . $font;
  75. imagefill($target_layer, 0, 0, $captcha_background);
  76. imagefttext($target_layer, $config['chars']['size'], 0, $config['chars']['start_x'], $config['chars']['start_y'], $captcha_text_color, $font_path, $captcha_code);
  77. return $target_layer;
  78. }
  79. public function renderCaptchaImage($imageData): void
  80. {
  81. header("Content-type: image/jpeg");
  82. imagejpeg($imageData);
  83. }
  84. public function validateCaptcha($formData): bool
  85. {
  86. $isValid = false;
  87. $capchaSessionData = $this->getSession();
  88. if ($capchaSessionData == $formData) {
  89. $isValid = true;
  90. }
  91. return $isValid;
  92. }
  93. private function hexToRgb($hex): array
  94. {
  95. return sscanf($hex, "#%02x%02x%02x");
  96. }
  97. }