PHP实现过滤留言信息中的敏感词
一 代码
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=gb2312" /><title>检测留言信息的敏感词</title></head><body><table width="761" border="0" align="center" cellpadding="0" cellspacing="0" bordercolor="#FEFEFE" bgcolor="#FFFFFF"> <form action="" method="post" name="form1" id="form1"> <tr> <td width="761" align="center" bgcolor="#F9F8EF"><table width="749" border="0" align="center" cellpadding="0" cellspacing="0" style="BORDER-COLLAPSE: collapse"> <tr> <td height="36" colspan="3" align="left" " bgcolor="#F9F8EF" > 姓 名: <input name="user_name" id="user_name" value=" 匿名" maxlength="64" type="text" /> <span style="COLOR: #ff0000">*</span></td> </tr> <tr> <td height="36" colspan="3" align="left" bgcolor="#F9F8EF"> 标 题: <input maxlength="64" size="30" name="title" type="text"/> <span style="COLOR: #ff0000">*</span></td> </tr> <tr> <td height="126" colspan="3" align="left" bgcolor="#F9F8EF"> 内 容: <textarea name="content" cols="60" rows="8" id="content" ></textarea> <span style="COLOR: #ff0000">*</span></td> </tr> <tr> <td height="40" colspan="3" align="center" bgcolor="#F9F<div>本文来*源gaodai^.ma#com搞#代!码网</div><pre>搞gaodaima代码
8EF"><input name="submit" type="submit" class="btn1" id="submit" value="签写留言"/> <input name="reset" type="reset" class="btn1" value="清除留言" /></td> </tr> </table></td> </tr> <tr> <td width="761" align="center" bgcolor="#F9F8EF"><table width="749" border="0" align="center" cellpadding="0" cellspacing="0"> <tr> <td width="703" height="31" align="center" > </td> </tr> </table></td> </tr> </form></table></body></html><?phpif($_POST){if (is_file("./filterwords.txt")){//判断给定文件名是否为一个正常的文件 $filter_word = file("./filterwords.txt");//把整个文件读入一个数组中$str=$_POST['content'];for($i=0;$i<count($filter_word);$i++){//应用For循环语句对敏感词进行判断 if(preg_match("/".trim($filter_word[$i])."/i",$str)){//应用正则表达式,判断传递的留言信息中是否含有敏感词 echo "<script> alert('留言信息中包含敏感词!');history.back(-1);</script>"; exit;}}}}?>