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php实现html标签闭合检测与修复方法

Jun 06, 2016 pm 07:51 PM
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这篇文章主要介绍了php实现html标签闭合检测与修复方法,可实现针对html标签中结束标签的检测与补全功能,非常具有实用价值,需要的朋友可以参考下

本文实例讲述了php实现html标签闭合检测与修复方法。分享给大家供大家参考。具体如下:

html标签闭合检测与修复,,说的有点大 , 并没有考虑的很完整,没有使用正则表达式, 适用于html文件中只有开始标签没有结束标签, 是有结束标签没有开始标签的情况。标签闭合的位置需要根据需求调整

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  • This is content this is content'; $str_len = strlen($str); //记录起始标签 $pre_data = array(); //记录起始标签位置 $pre_pos = array(); $last_data = array(); $error_data = array(); $error_pos = array(); $i = 0; //标记为 " && $str[$i]!="'" && $str[$i]!='"' && $str[$i] !='http://www.jb51.net/' && $i" && $i0) { $last_pre_node = getLastNode($pre_data, 1); if($last_pre_node == $_tmp_str) { //配对上, 删除对应位置的值 array_pop($pre_data); array_pop($pre_pos); array_pop($last_data); } else { //没有配对上, 有两种情况 //情况一: 只有闭合标签, 没有开始标签 //情况二:只有开始标签, 没有闭合标签 array_pop($last_data); $error_data[] = $_tmp_str; $error_pos[] = $i; } } else { array_pop($last_data); $error_data[] = $_tmp_str; $error_pos[] = $i; } }else if ($str[$i]=="") { $i++; break; } else { $i++; } } $i++; }else if($str[$i]=='http://www.jb51.net/' && $str[$i+1]=='>') { //跳过自动单个闭合标签 if($start_flag) { array_pop($pre_data); array_pop($pre_pos); $i+=2; } }else if($str[$i]=="http://www.jb51.net/" && $str[$i+1]=="*"){ $i++; while($i") { $j++; while ($j 0) { if($str[$j] == '"') { $j--; while ($j") { $j++; break; } else { $j--; } } return $j; } //获取数组的倒数第num个值 function getLastNode(array $arr, $num){ $len = count($arr); if($len > $num) { return $arr[$len-$num]; } else { return $arr[0]; } } //整理数据, 主要是向后看, 进一步进行检查 function sort_data(&$pre_data, &$pre_pos, &$error_data, &$error_pos){ $rem_key_array = array(); $rem_i_array = array(); //获取需要删除的值 foreach($error_data as $key=>$value){ $count = count($pre_data); for($i=($count-1) ; $i>=0; $i--) { if($pre_data[$i] == $value && !in_array($i, $rem_i_array)) { $rem_key_array[] = $key; $rem_i_array[] = $i; break; } } } //删除起始标签相应的值 foreach($rem_key_array as $_item) { unset($error_pos[$_item]); unset($error_data[$_item]); } //删除结束标签相应的值 foreach($rem_i_array as $_item) { unset($pre_data[$_item]); unset($pre_pos[$_item]); } } //整理数据, 闭合标签 function modify_data($str, $pre_data, $pre_pos, $error_data, $error_pos){ $move_log = array(); //只有闭合标签的数据 foreach ($error_data as $key => $value) { // code... $_tmp_move_count = 0; foreach ($move_log as $pos_key => $move_value) { // code... if($error_pos[$key]>=$pos_key) { $_tmp_move_count += $move_value; } } $data = insert_data($str, $value, $error_pos[$key]+$_tmp_move_count, false); $str = $data['str']; $move_log[$data['pos']] = $data['move_count']; } //只有起始标签的数据 foreach ($pre_data as $key => $value) { // code... $_tmp_move_count = 0; foreach ($move_log as $pos_key => $move_value) { // code... if($pre_pos[$key]>=$pos_key) { $_tmp_move_count += $move_value; } } $data = insert_data($str, $value, $pre_pos[$key]+$_tmp_move_count, true); $str = $data['str']; $move_log[$data['pos']] = $data['move_count']; } return $str; } //插入数据, $type 表示插入数据的方式 function insert_data($str, $insert_data, $pos, $type) { $len = strlen($str); //起始标签类型 if($type==true) { $move_count = strlen($insert_data)+3; $pos = confirm_pre_pos($str, $pos); $pre_str = substr($str, 0, $pos); $end_str = substr($str, $pos); $mid_str = "" . $insert_data . ">"; //闭合标签类型 } else { $pos = confirm_err_pos($str, $pos); $move_count = strlen($insert_data) + 2; $pre_str = substr($str, 0, $pos); $end_str = substr($str, $pos); $mid_str = ""; } $str = $pre_str.$mid_str.$end_str; return array('str'=>$str, 'pos'=>$pos, 'move_count'=>$move_count); } sort_data($pre_data, $pre_pos, $error_data, $error_pos); $new_str = modify_data($str, $pre_data, $pre_pos, $error_data, $error_pos); echo $new_str; // print_r($pre_data); // print_r($pre_pos); // print_r($error_data); // print_r($error_pos); // echo strlen($str); // foreach($pre_pos as $value){ // $value = confirm_pre_pos($str, $value); // for($i=$value-5; $i

    希望本文所述对大家的php程序设计有所帮助。

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