4,5行不懂求解释 无 ?phpfunction str($str){$array = array("1","2","3","4","5","6");$repstr = implode($array);if(preg_match("/$str/",$repstr)){echo "scriptalert('您使用了禁用词语，请重新填写');location.href='16.php'/script";}else{echo "内容为
4,5行 不懂 求解释
<?php
function str($str){
$array = array("1","2","3","4","5","6");
$repstr = implode($array);
if(preg_match("/$str/",$repstr)){
echo "<script>alert('您使用了禁用词语，请重新填写');location.href='16.php'</script>";
}else{
echo "内容为：".$str;
}
}
if(!empty($_POST['sub'])){
str($_POST['te']);
}
?>
<html>
<head>
<title>过滤字符串</title>
<meta charset=utf-8">
</head>
<body>
<form action="" method="post">
<b style="float:left">内容：</b><textarea cols="18" rows="2" name="te"></textarea>
<p><center><input type="submit" name="sub" value="提交"></center></p>
</form>
</body>
</html>
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
