PHP移除字符串超链接文本的正则表达式
由于N久之前做了一些非常不好的动作导致网站内容页面有一些垃圾数据,今天早上整了一个移除字符串超链接文本方法,下面我结合正则来处理。
下面实例的功能是过滤所有的html标签,并替换h1-h5之前的所有文字
<?php for ($i = 1; $i <= 5; $i++) { $sql = "SELECT * FROM `表名` WHERE `字段` like '<h" . $i . ">%</h" . $i . ">%' "; $query = mysql_query($sql) or die(mysql_error()); if (mysql_num_rows($query)) { while ($rs = mysql_fetch_array($query)) { //print_r($rs); $t = stripslashes($rs['字段']); $str = nl2br(strip_tags(addslashes(removelink($t)))); $sql = "update 表名 set 字段='$str' where id=" . $rs['id']; if (mysql_query($sql)) { echo $rs['id'] . '成功<br />'; } else { echo mysql_error(); } } } else { echo '己更新过没有记录了' . $sql . '<br />'; } } function removelink($t) { //$str = preg_replace("/<a[^>]*href=[^>]*>|</[^a]*a[^>]*>/i","",$t); $str = preg_replace("/(?is)(?<=<h1 id="">).*?(?=</h1>)/i", "", $t); $str = preg_replace("/(?is)(?<=<h2 id="">).*?(?=</h2>)/i", "", $str); $str = preg_replace("/(?is)(?<=<h3 id="">).*?(?=</h3>)/i", "", $str); $str = preg_replace("/(?is)(?<=<h4 id="">).*?(?=</h4>)/i", "", $str); $str = preg_replace("/(?is)(?<=<h5 id="">).*?(?=</h5>)/i", "", $str); return re_h($str); } function re_h($str) { $str = str_replace('<h1>', '', $str); $str = str_replace('<h2>', '', $str); $str = str_replace('<h3>', '', $str); $str = str_replace('<h4>', '', $str); $str = str_replace('<h5>', '', $str); $str = str_replace('</h1>', '', $str); $str = str_replace('</h2>', '', $str); $str = str_replace('</h3>', '', $str); $str = str_replace('</h4>', '', $str); $str = str_replace('</h5>', '', $str); return $str; } ?>
上面用到了下面的正则表达式
preg_replace("/(?is)(?<=<h1 id="">).*?(?=</h1>)/i","",$t);
这就是核心代码了
比如需要将文本中的超链接内容去除,这个时候就需要用到正则表达式了。比如你可以用$str = preg_replace("/]*href=[^>]*>|[^a]*a[^>]*>/i","",$strhtml); 这段来实现需求,如果想要更多解决方法,可以参看以下的。
1、删除内容中的超链接
ereg_replace('<a([^>]*)>([^<]*)</a>','<font color="red">2</font>',$content); ereg_replace("<a [^>]*>|</a>","",$content);
2、消除包含特定词的超链接
$find="this string is my find";
$string='替换掉了';//将超链接替换成的内容
echo ereg_replace(']*)>([^]*)','2',$content);
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