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HTTP request class for easy POST/GET manipulation

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  1. <?php
  2.  
  3. class HttpReq {
  4.  
  5. 	public $param; // the returned POST/GET values
  6. 	public $cookie; // the returned COOKIE values
  7. 	public $session; // the returned SESSION values
  8. 	private $strength; // the strength of sanitization
  9.  
  10. 	/**
  11. 	 * Class constructor takes one argument to set the strength of sanitization
  12. 	 * @param string $strength values can be 'normal', 'strong', or 'strict'
  13. 	 */
  14. 	public function __construct($strength='normal'){
  15. 		$this->param = array();
  16. 		$this->cookie = array();
  17. 		$this->session = array();
  18. 		$this->strength = $strength;
  19. 	}
  20.  
  21.  
  22. 	/**
  23. 	 * Method to set, clean &/or sanitize a $_GET value if set
  24. 	 * @param string $name the name of the value sought
  25. 	 * @param boolean $urlDecode set to TRUE if the method should urldecode the value
  26. 	 * @param boolean $san set to TRUE if the method should sanitize the value against XSS vulnerabilities
  27. 	 * @return array
  28. 	 */
  29. 	public function by_get($name='', $urlDecode=FALSE, $san=FALSE) {
  30.  
  31. 		if (isset($_GET[$name])) 
  32. 		{
  33. 			if ($urlDecode && $san) {
  34. 				$this->param[$name] = $this->clean_data(
  35. 				$this->san_data($_GET[$name]), 
  36. 				TRUE);
  37. 			}
  38. 			elseif ($urlDecode) {
  39. 				$this->param[$name] = $this->clean_data($_GET[$name], TRUE);
  40. 			}
  41. 			elseif ($san) {
  42. 				$this->param[$name] = $this->clean_data(
  43. 				$this->san_data($_GET[$name]), 
  44. 				FALSE);
  45. 			}
  46. 			else {
  47. 				$this->param[$name] = $this->clean_data($_GET[$name], FALSE);
  48. 			}
  49. 		} 
  50. 		else {
  51. 			$this->param[$name] = NULL;
  52. 		}
  53. 		return $this->param;
  54. 	}
  55.  
  56.  
  57. 	/**
  58. 	 * Method to set, clean &/or sanitize a $_POST value if set
  59. 	 * @param string $name the name of the value sought
  60. 	 * @param boolean $urlDecode set to TRUE if the method should urldecode the value
  61. 	 * @param boolean $san set to TRUE if the method should sanitize the value against XSS vulnerabilities
  62. 	 * @return array
  63. 	 */
  64. 	public function by_post($name='', $urlDecode=FALSE, $san=FALSE) {
  65.  
  66. 		if (isset($_POST[$name])) 
  67. 		{
  68. 			if ($urlDecode && $san) {
  69. 				$this->param[$name] = $this->clean_data(
  70. 				$this->san_data($_POST[$name]), 
  71. 				TRUE);
  72. 			}
  73. 			elseif ($urlDecode) {
  74. 				$this->param[$name] = $this->clean_data($_POST[$name], TRUE);
  75. 			}
  76. 			elseif ($san) {
  77. 				$this->param[$name] = $this->clean_data(
  78. 				$this->san_data($_POST[$name]), 
  79. 				FALSE);
  80. 			}
  81. 			else {
  82. 				$this->param[$name] = $this->clean_data($_POST[$name], FALSE);
  83. 			}
  84. 		} 
  85. 		else {
  86. 			$this->param[$name] = NULL;
  87. 		}
  88. 		return $this->param;
  89. 	}
  90.  
  91.  
  92. 	/**
  93. 	 * Additional method to set a $_COOKIE value if set
  94. 	 * @param string $name the name of the value sought
  95. 	 */
  96. 	public function by_cookie($name='') {
  97. 		$this->cookie[$name] = (isset($_COOKIE[$name])) ?
  98. 			$_COOKIE[$name] : NULL;
  99.  
  100. 		return $this->cookie;
  101. 	}
  102.  
  103.  
  104. 	/**
  105. 	 * Additional method to set a $_SESSION value if set
  106. 	 * @param string $name the name of the value sought
  107. 	 */
  108. 	public function by_session($name='') {
  109. 		$this->session[$name] = (isset($_SESSION[$name])) ?
  110. 			$_SESSION[$name] : NULL;
  111.  
  112. 		return $this->session;
  113. 	}
  114.  
  115.  
  116. 	/**
  117. 	 * Private method to clean data
  118. 	 * @param mixed $data
  119. 	 * @param Boolean $isUrlEncoded
  120. 	 */
  121. 	private function clean_data($data, $isUrlEncoded=FALSE) {
  122. 		return ($isUrlEncoded) ?
  123. 		    strip_tags(trim(urldecode($data))) :
  124. 		    strip_tags(trim($data));
  125. 	}
  126.  
  127.  
  128. 	/**
  129. 	 * Private method to sanitize data
  130. 	 * @param mixed $data
  131. 	 */
  132. 	private function san_data($data) {
  133. 		switch($this->strength){
  134. 			default:
  135. 				return htmlspecialchars($data, ENT_QUOTES, "UTF-8");
  136. 				break;
  137. 			case 'strong':
  138. 				return htmlentities($data, ENT_QUOTES | ENT_IGNORE, "UTF-8");
  139. 				break;
  140. 			case 'strict':
  141. 				return urlencode($data);
  142. 				break;
  143. 		}
  144. 	}
  145.  
  146. }

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