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HomeBackend DevelopmentPHP TutorialFix code for HTML tags that are not closed normally (supports nesting and nearby closing)

  1. /**

  2. * fixHtmlTag
  3. *
  4. * html标签修复函数,此函数可以修复未正确闭合的 HTML 标签
  5. *
  6. * 由于不确定性因素太多,暂时提供两种模式“嵌套闭合模式”和
  7. * “就近闭合模式”,应该够用了。
  8. *
  9. * 这两种模式是我为了解释清楚此函数的实现而创造的两个名词,
  10. * 只需明白什么意思就行。
  11. * 1,嵌套闭合模式,NEST,为默认的闭合方式。即 "
    你好"
  12. * 这样的 html 代码会被修改为 "
    你好
    "
  13. * 2. Nearby closing mode, CLOSE. This mode will modify the code in the form of "

    Hello

    Why is there no

  14. * closed?" to "

    Why is it not closed

    "
  15. *
  16. * In the nested closing mode (default, no special parameters are required), you can pass in the
  17. * that needs to be closed nearby Tag name, in this way, something like "

    Hello

    Me, too" will be converted into

  18. * "

    Hello

    I also like the form of

    ".
  19. * When passing parameters, the index needs to be written as follows. Settings that do not need to be modified can be omitted
  20. *
  21. * $param = array(
  22. * 'html' => '', //Required
  23. * 'options' => ; array(
  24. * 'tagArray' => array();
  25. * 'type' => 'NEST',
  26. * 'length' => null,
  27. * 'lowerTag' => TRUE,
  28. * ' XHtmlFix' => TRUE,
  29. * )
  30. * );
  31. * fixHtmlTag($param);
  32. *
  33. * The meaning of the value corresponding to the above index is as follows
  34. * string $html The html code that needs to be modified
  35. * array $tagArray shall be When nesting mode, the nearest closed tag array is required
  36. * string $type mode name, currently supports two modes: NEST and CLOSE. If set to CLOSE, the setting of the parameter $tagArray will be ignored, and all tags will be closed at the nearest
  37. * ini $length If you want to truncate a certain length, you can assign a value here. This length refers to the length of the string.
  38. * bool $lowerTag Whether to convert all tags in the code to lowercase, the default is TRUE
  39. * bool $XHtmlFix Whether to handle inconsistencies XHTML standard tags, that is, converting
    to
  40. *
  41. * @author IT卤场
  42. * @version 0.2
  43. * @link http://bbs.it -home.org IT tumbler
  44. * @link http://enenba.com/?post=19 XX
  45. * @param array $param array parameter, which needs to be assigned a specific index
  46. * @return string $result processed html code
  47. * @since 2012-04-14
  48. */
  49. function fixHtmlTag($param = array()) {
  50. //Default value of parameter
  51. $html = '';
  52. $tagArray = array();
  53. $ type = 'NEST';
  54. $length = null;
  55. $lowerTag = TRUE;
  56. $XHtmlFix = TRUE;
  57. //First get the one-dimensional array, that is, $html and $options (if Parameters are provided)

  58. extract($param);
  59. //If options exist, extract relevant variables

  60. if (isset($options)) {
  61. extract($options);
  62. }< ;/p>
  63. $result = ''; //The final html code to be returned

  64. $tagStack = array(); //Tag stack, simulated with array_push() and array_pop()
  65. $contents = array(); //Used to store html tags
  66. $len = 0; //Initial length of the string
  67. //Set the closing mark $isClosed, the default is TRUE, if you need to close it nearby , after successfully matching the start tag, its value is false, and after successful closing, it is true

  68. $isClosed = true;
  69. //Convert all tags to be processed to lowercase

  70. $tagArray = array_map('strtolower ', $tagArray);
  71. //"Legal" single closed tag

  72. $singleTagArray = array(
  73. ''''
    '
    ''Fix code for HTML tags that are not closed normally (supports nesting and nearby closing));
  74. //Verification matching pattern $type , the default is NEST mode

  75. $type = strtoupper($type);
  76. if (!in_array($type, array('NEST', 'CLOSE'))) {
  77. $type = 'NEST';
  78. } p>
  79. //Using a pair of as delimiters, put the original html tag and the string in the tag into an array

  80. $contents = preg_split("/( ]+?>)/si", $html, -1, PREG_SPLIT_NO_EMPTY | PREG_SPLIT_DELIM_CAPTURE);
  81. foreach ($contents as $tag) {

  82. if ('' == trim($ tag)) {
  83. $result .= $tag;
  84. continue;
  85. }
  86. //Match standard single closed tags, such as

  87. if (preg_match("/ ]*?/>/si", $tag)) {
  88. $result .= $tag;
  89. continue;
  90. }
  91. // Match the start tag, if it is a single tag, pop it off the stack

  92. else if (preg_match("/]*?>/si", $tag, $match)) {
  93. //if The previous label is not closed, and the previous label belongs to the nearest closed type
  94. //Close it, and pop the previous label
  95. //If the label is not closed

  96. if (false === $ isClosed) {
  97. //Close close mode, close all tags directly
  98. if ('CLOSE' == $type) {
  99. $result .= '' . end($tagStack) . '>';
  100. array_pop($tagStack);
  101. }
  102. //Default nesting mode, the tag provided by the nearest closing parameter
  103. else {
  104. if (in_array(end($tagStack), $tagArray)) {
  105. $result .= '< ;/' . end($tagStack) . '>';
  106. array_pop($tagStack);
  107. }
  108. }
  109. }
  110. //If the parameter $lowerTag is TRUE, convert the tag name to lowercase

  111. $matchLower = $lowerTag == TRUE ? strtolower($match[1]) : $match[1];
  112. $tag = str_replace('//Start a new tag combination

  113. $result . = $tag;
  114. array_push($tagStack, $matchLower);
  115. //If it belongs to the agreed single tag, close it and pop it out of the stack

  116. foreach ($singleTagArray as $singleTag) {
  117. if (stripos($tag, $singleTag) !== false) {
  118. if ($XHtmlFix == TRUE) {
  119. $tag = str_replace('>', ' />', $tag);
  120. }
  121. array_pop($tagStack);
  122. }
  123. }
  124. //Nearby closed mode, status changes to unclosed

  125. if ('CLOSE' == $type) {
  126. $isClosed = false;
  127. }
  128. //Default nesting mode, if the tag is located in the provided $tagArray, the status is changed to unclosed
  129. else {
  130. if (in_array($matchLower, $tagArray)) {
  131. $isClosed = false;
  132. }
  133. }
  134. unset($matchLower);
  135. }
  136. //Match the closing tag and pop it off the stack if appropriate

  137. else if (preg_match("/(w+)[^/> ]*?>/si", $tag, $match)) {
  138. //If the parameter $lowerTag is TRUE, convert the tag name to lowercase

  139. $matchLower = $lowerTag == TRUE ? strtolower($match[1]) : $match[1];
  140. if (end($tagStack) == $matchLower) {

  141. $isClosed = true; //Match completed , tag closure
  142. $tag = str_replace('' . $match[1], '' . $matchLower, $tag);
  143. $result .= $tag;
  144. array_pop($tagStack);
  145. }
  146. unset($matchLower);
  147. }
  148. //Match comments, directly connect $result

  149. else if (preg_match("// si", $tag)) {
  150. $result .= $tag;
  151. }
  152. //Put the string into $result and do the truncation operation

  153. else {
  154. if (is_null ($length) || $len + mb_strlen($tag) $result .= $tag;
  155. $len += mb_strlen($tag);
  156. } else {
  157. $str = mb_substr($ tag, 0, $length - $len + 1);
  158. $result .= $str;
  159. break;
  160. }
  161. }
  162. }
  163. //If there are still unused items in the stack The closed tag is connected to $result

  164. while (!empty($tagStack)) {
  165. $result .= '' . array_pop($tagStack) . '>';
  166. }
  167. return $result;
  168. }
  169. ?>
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