<!DOCTYPE html>
<html lang="zh-cn">
<head>
<meta charset="UTF-8">
<title>敏感词替换</title>
</head>
<body>
<form action="" method="post">
<label for="">请输入您的评论：</label><br>
<textarea name="pinglun" id="" cols="30" rows="10"></textarea><br>
<input type="submit" value="提交">
</form>
</body>
</html>
<?php
if ($_POST) {
$pinglun=$_POST['pinglun'];
$word=['傻逼','二百五','垃圾'];
if (str_replace($word, "", $pinglun)!==$pinglun) {
echo "<script>alert('您的评论存在敏感词，将会被替换');</script>";
$str=str_replace($word, "***", $pinglun);
exit("<script>alert('您替换后的评论是：{$str}');</script>");
}else{
exit("<script>alert('您的评论是：{$pinglun}');</script>");
}
}
?>