记录一个php的html标签自动闭合的函数代码
<?php function fix_html_tags($input, $single_tags = array()) { $result = null; $stack = array();//标签栈 $_single_tags = array('br', 'hr', 'img', 'input');//合理的单标签 if ($single_tags && is_array($single_tags)) { $_single_tags = array_merge($_single_tags, $single_tags); $_single_tags = array_map('strtolower', $_single_tags); $_single_tags = array_unique($_single_tags); } //返回标签分隔之后的内容,包括标签本身 $content = preg_split('/(<[^>]+>)/si', $input, null, PREG_SPLIT_NO_EMPTY | PREG_SPLIT_DELIM_CAPTURE); foreach ($content as $val) { //匹配未闭合的自闭合标签 如 <br> <hr> 等 if (preg_match('/<(\w+)[^\/]*>/si', $val, $m) && in_array(strtolower($m[1]), $_single_tags) ) { $result .= "\r\n" . $val; } //匹配标准书写的自闭合标签,直接返回,不入栈 else if (preg_match('/<(\w+)[^\/]*\/>/si', $val, $m)) { $result .= $val; } //匹配开始标签,并入栈 else if (preg_match('/<(\w+)[^\/]*>/si', $val, $m)) { $result .= "\r\n" . str_repeat("\t", count($stack)) . $val; array_push($stack, $m[1]); } //匹配闭合标签,匹配前先判断当前闭合标签是栈顶标签的闭合,优先闭合栈顶标签 else if (preg_match('/<\/(\w+)[^\/]*>/si', $val, $m)) { //出栈,多余的闭合标签直接舍弃 if (strtolower(end($stack)) == strtolower($m[1])) { array_pop($stack); $result .= $val; } } else { $result .= $val; } } //倒出所有栈内元素 while ($stack) { $result .= "</".array_pop($stack).">"; $result .= "\r\n"; } return $result; } $str="<div>sdfsdf<span>2<span></span>34534<div>121</span></div>"; echo fix_html_tags($str); ?>