国内流行的内容管理系统(CMS)多端全媒体解决方案 https://www.dedebiz.com
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  1. <?php
  2. if (!defined('DEDEINC')) exit('dedebiz');
  3. /**
  4. * 过滤小助手
  5. *
  6. * @version $Id: filter.helper.php 1 2010-07-05 11:43:09Z tianya $
  7. * @package DedeBIZ.Helpers
  8. * @copyright Copyright (c) 2022, DedeBIZ.COM
  9. * @license https://www.dedebiz.com/license
  10. * @link https://www.dedebiz.com
  11. */
  12. /**
  13. * 去除html中不规则内容字符
  14. *
  15. * @access public
  16. * @param string $str 需要处理的字符串
  17. * @param string $rptype 返回类型
  18. * $rptype = 0 表示仅替换 html标记
  19. * $rptype = 1 表示替换 html标记同时去除连续空白字符
  20. * $rptype = 2 表示替换 html标记同时去除所有空白字符
  21. * $rptype = -1 表示仅替换 html危险的标记
  22. * @return string
  23. */
  24. if (!function_exists('HtmlReplace')) {
  25. function HtmlReplace($str, $rptype = 0)
  26. {
  27. $str = stripslashes($str);
  28. $str = preg_replace("/<[\/]{0,1}style([^>]*)>(.*)<\/style>/i", '', $str);
  29. if ($rptype == 0) {
  30. $str = dede_htmlspecialchars($str);
  31. } else if ($rptype == 1) {
  32. $str = dede_htmlspecialchars($str);
  33. $str = str_replace(" ", ' ', $str);
  34. $str = preg_replace("/[\r\n\t ]{1,}/", ' ', $str);
  35. } else if ($rptype == 2) {
  36. $str = dede_htmlspecialchars($str);
  37. $str = str_replace(" ", '', $str);
  38. $str = preg_replace("/[\r\n\t ]/", '', $str);
  39. } else {
  40. $str = preg_replace("/[\r\n\t ]{1,}/", ' ', $str);
  41. $str = preg_replace('/script/i', 'script', $str);
  42. $str = preg_replace("/<[\/]{0,1}(link|meta|ifr|fra)[^>]*>/i", '', $str);
  43. }
  44. return addslashes($str);
  45. }
  46. }
  47. /**
  48. * 修复浏览器XSS hack的函数
  49. *
  50. * @param string $val 需要处理的内容
  51. * @return string
  52. */
  53. if (!function_exists('RemoveXSS')) {
  54. function RemoveXSS($val)
  55. {
  56. $val = preg_replace('/([\x00-\x08|\x0b-\x0c|\x0e-\x19])/', '', $val);
  57. $search = 'abcdefghijklmnopqrstuvwxyz';
  58. $search .= 'ABCDEFGHIJKLMNOPQRSTUVWXYZ';
  59. $search .= '1234567890!@#$%^&*()';
  60. $search .= '~`";:?+/={}[]-_|\'\\';
  61. for ($i = 0; $i < strlen($search); $i++) {
  62. $val = preg_replace('/(&#[xX]0{0,8}'.dechex(ord($search[$i])).';?)/i', $search[$i], $val); //with a ;
  63. $val = preg_replace('/(&#0{0,8}'.ord($search[$i]).';?)/', $search[$i], $val); //with a ;
  64. }
  65. $ra1 = array('javascript', 'vbscript', 'expression', 'applet', 'meta', 'xml', 'blink', 'link', 'style', 'script', 'embed', 'object', 'iframe', 'frame', 'frameset', 'ilayer', 'layer', 'bgsound', 'title', 'base');
  66. $ra2 = array('onabort', 'onactivate', 'onafterprint', 'onafterupdate', 'onbeforeactivate', 'onbeforecopy', 'onbeforecut', 'onbeforedeactivate', 'onbeforeeditfocus', 'onbeforepaste', 'onbeforeprint', 'onbeforeunload', 'onbeforeupdate', 'onblur', 'onbounce', 'oncellchange', 'onchange', 'onclick', 'oncontextmenu', 'oncontrolselect', 'oncopy', 'oncut', 'ondataavailable', 'ondatasetchanged', 'ondatasetcomplete', 'ondblclick', 'ondeactivate', 'ondrag', 'ondragend', 'ondragenter', 'ondragleave', 'ondragover', 'ondragstart', 'ondrop', 'onerror', 'onerrorupdate', 'onfilterchange', 'onfinish', 'onfocus', 'onfocusin', 'onfocusout', 'onhelp', 'onkeydown', 'onkeypress', 'onkeyup', 'onlayoutcomplete', 'onload', 'onlosecapture', 'onmousedown', 'onmouseenter', 'onmouseleave', 'onmousemove', 'onmouseout', 'onmouseover', 'onmouseup', 'onmousewheel', 'onmove', 'onmoveend', 'onmovestart', 'onpaste', 'onpropertychange', 'onreadystatechange', 'onreset', 'onresize', 'onresizeend', 'onresizestart', 'onrowenter', 'onrowexit', 'onrowsdelete', 'onrowsinserted', 'onscroll', 'onselect', 'onselectionchange', 'onselectstart', 'onstart', 'onstop', 'onsubmit', 'onunload');
  67. $ra = array_merge($ra1, $ra2);
  68. $found = true;
  69. while ($found == true) {
  70. $val_before = $val;
  71. for ($i = 0; $i < sizeof($ra); $i++) {
  72. $pattern = '/';
  73. for ($j = 0; $j < strlen($ra[$i]); $j++) {
  74. if ($j > 0) {
  75. $pattern .= '(';
  76. $pattern .= '(&#[xX]0{0,8}([9ab]);)';
  77. $pattern .= '|';
  78. $pattern .= '|(&#0{0,8}([9|10|13]);)';
  79. $pattern .= ')*';
  80. }
  81. $pattern .= $ra[$i][$j];
  82. }
  83. $pattern .= '/i';
  84. $replacement = substr($ra[$i], 0, 2).'<x>'.substr($ra[$i], 2);
  85. $val = preg_replace($pattern, $replacement, $val);
  86. if ($val_before == $val) {
  87. $found = false;
  88. }
  89. }
  90. }
  91. return $val;
  92. }
  93. }
  94. /**
  95. * 处理禁用HTML但允许换行的内容
  96. *
  97. * @access public
  98. * @param string $msg 需要过滤的内容
  99. * @return string
  100. */
  101. if (!function_exists('TrimMsg')) {
  102. function TrimMsg($msg)
  103. {
  104. $msg = trim(stripslashes($msg));
  105. $msg = nl2br(dede_htmlspecialchars($msg));
  106. $msg = str_replace(" ", "&nbsp;&nbsp;", $msg);
  107. return addslashes($msg);
  108. }
  109. }
  110. /**
  111. * 过滤用于搜索的字符串
  112. *
  113. * @param string $keyword 关键词
  114. * @return string
  115. */
  116. if (!function_exists('FilterSearch')) {
  117. function FilterSearch($keyword)
  118. {
  119. global $cfg_soft_lang;
  120. if ($cfg_soft_lang == 'utf-8') {
  121. $keyword = preg_replace("/[\"\r\n\t\$\\><']/", '', $keyword);
  122. if ($keyword != stripslashes($keyword)) {
  123. return '';
  124. } else {
  125. return $keyword;
  126. }
  127. } else {
  128. $restr = '';
  129. for ($i = 0; isset($keyword[$i]); $i++) {
  130. if (ord($keyword[$i]) > 0x80) {
  131. if (isset($keyword[$i + 1]) && ord($keyword[$i + 1]) > 0x40) {
  132. $restr .= $keyword[$i].$keyword[$i + 1];
  133. $i++;
  134. } else {
  135. $restr .= ' ';
  136. }
  137. } else {
  138. if (preg_match("/[^0-9a-z@#\.]/", $keyword[$i])) {
  139. $restr .= ' ';
  140. } else {
  141. $restr .= $keyword[$i];
  142. }
  143. }
  144. }
  145. }
  146. return $restr;
  147. }
  148. }