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HarmonyOS
在第20行出现了报错
下面是这个php文件的完整代码：
<?php
header('content-type:text/html;charset=utf-8');
date_default_timezone_set('PRC');
$file="123.txt";
$msgs=[];
//检测文件是否存以及读取
if (file_exists($file)){
$string=file_get_contents($file); //为真则读取文件并赋值
if (strlen($string)>0){ //判断获取的文件是否有内容
$msgs=unserialize($string); //有则转为数组并赋值
};
};
//判断提交是否正常以及接收
if (isset($_POST['subpop'])){
$username=($_POST['username']);
$title=strip_tags($_POST['title']);
$content=strip_tags($_POST['content']);
$time=time();
$data=compact('username','title','content','time');
array_push($msgs,$data);/* 报错提示如下
Warning: array_push() expects parameter 1 to be array, null given in / on line 20
*/
$msgs=serialize($msgs); //重新转换并赋值
if(file_put_contents($file,$msgs)){ //将$msgs压入文件末行
echo "<script>alert('留言成功！');</script>";
}else {
echo "<script>alert('留言失败！');</script>";
};
};
?>
<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport"
content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<link href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.1/css/bootstrap.min.css" rel="stylesheet" crossorigin="anonymous">
<script type="text/javascript" src="http://www.francescomalagrino.com/BootstrapPageGenerator/3/js/jquery-2.0.0.min.js"></script>
<script type="text/javascript" src="http://www.francescomalagrino.com/BootstrapPageGenerator/3/js/bootstrap.min.js"></script>
<title>Document</title>
<style>
.Dcenter{
position: fixed;
bottom: 0;
}
</style>
</head>
<body>
<?php if(is_array($msgs)&&count($msgs)>0):?>
<table cellspacing="0" cellpadding="0" width="70%" class="table table-sm table-bordered">
<tr>
<th>用户名:</th>
<th>标题:</th>
<th>内容:</th>
<th>时间:</th>
</tr>
<tbody>
<?php $i=1;foreach($msgs as $val):?>
<tr class="success">
<td>
<?php echo $i++;?>
</td>
<td>
<?php echo $val['username'];?>
</td>
<td>
<?php echo $val['title'];?>
</td>
<td>
<?php echo date("m/d/Y H:i:s",$val['time']);?>
</td>
<td>
<?php echo $val['content'];?>
</td>
</tr>
<?php endforeach;?>
</tbody>
</table>
<?php endif;?>
<div class="container">
<div class="row Dcenter">
<form action="#" method="post">
<fieldset>
<legend>留言板</legend>
<label>用户名:</label><input type="text" name="username" placeholder="请输入用户名" required>
<label>标题:</label><input type="text" name="title" placeholder="请输入标题" required>
<label>内容:</label><textarea name="content" rows="1"></textarea>
<input type="submit" name="subpop" value="提交">
</fieldset>
</form>
</div>
</div>
</body>
</html>
$msg没数组 报错信息 写了 array_push第一个参数要 数组 你给了null