助教你不回答 我只好又来提问了 点击提交之后表格不显示 是哪写错了？找不到啊
<?php
header('content-type:text/html;charset=utf-8');
date_default_timezone_set('PRC');
$filename="msg.txt";
$msgs=[];
if(file_exists($filename)){
$string=file_get_contents($filename);
if(strlen($string>0)){
$msgs=unserialize($string);
}
}
//检测用户是否点击了按钮
if(isset($_POST['pubmsg'])){
$username=$_POST['username'];
$title=$_POST['title'];
$content=$_POST['content'];
$time=time();
$data=compact('username','title','content','time');
array_push($msgs,$data);
$msgs=serialize($msgs); //序列号变成字符串
if(file_put_contents($filename,$msgs)){
echo "<script>alert('留言成功！');location.href='webpage.php';</script>";
}else{
echo "<script>alert('留言失败！');location.href='webpage.php';</script>";
}
}
?>
<!DOCTYPE html>
<html>
<head>
<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/jquery-ui"></script>
<link href="http://www.francescomalagrino.com/BootstrapPageGenerator/3/css/bootstrap-combined.min.css" rel="stylesheet" media="screen">
<script type="text/javascript" src="http://www.francescomalagrino.com/BootstrapPageGenerator/3/js/bootstrap.min.js"></script>
</head>
<body>
<div class="container-fluid">
<div class="row-fluid">
<div class="span12">
<div class="page-header">
<h1>
this is Pan show time
</h1>
</div>
<?php if(is_array($msgs)&&count($msgs)>0):?>
<table class="table">
<thead>
<tr>
<th>
编号
</th>
<th>
用户
</th>
<th>
标题
</th>
<th>
时间
</th>
<th>
内容
</th>
</tr>
</thead>
<tbody>
<?php $i=1;foreach($msgs as $val):?>
<tr class="success">
<td>
<?php echo $i++; ?>
</td>
<td>
<?php echo $var['username']; ?>
</td>
<td>
<?php echo $var['title']; ?>
</td>
<td>
<?php echo date("Y-m-d H:i:s",$var['time']);?>
</td>
<td>
<?php echo $val['content'];?>
</td>
</tr>
<?php endforeach; ?>
</tbody>
</table>
<?php endif;?>
<form action="#" method="post">
<fieldset>
<legend>留言处</legend>
<label>用户名</label>
<input type="text" name="username" required>
<label>标题</label>
<input type="text" name="title" required>
<label>内容</label>
<textarea name="content" cols="30" rows="5" required></textarea>
<hr color="pink">
<button type="submit" name="pubmsg" class="btn">提交</button>
</fieldset>
</form>
</div>
</div>
</div>
</body>
</html>
源自：数组运用
2-12 留言板功能实现
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5回答
慕移动4345823
2017-07-14 13:49:49
你看看第9行， if(strlen($string>0)){ 应该改成 if(strlen($string)>0){ strlen()函数算好$string的长度再和0比较
Joper
2017-07-11 14:52:31
<?php
header('content-type:text/html;charset=utf-8');
date_default_timezone_set('PRC');
$filename="msg.txt";
$msgs=[];
if(file_exists($filename)){
$string=file_get_contents($filename);
if(strlen($string>0)){
$msgs=unserialize($string);
}
}
//检测用户是否点击了按钮
if(isset($_POST['pubmsg'])){
$username=$_POST['username'];
$title=$_POST['title'];
$content=$_POST['content'];
$time=time();
$data=compact('username','title','content','time');
array_push($msgs,$data);
$msgs=serialize($msgs); //序列号变成字符串
if(file_put_contents($filename,$msgs)){
echo "<script>alert('留言成功！');location.href='1.php';</script>";
}else{
echo "<script>alert('留言失败！');location.href='1.php';</script>";
}
}
?>
<!DOCTYPE html>
<html>
<head>
<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/jquery-ui"></script>
<link href="http://www.francescomalagrino.com/BootstrapPageGenerator/3/css/bootstrap-combined.min.css" rel="stylesheet" media="screen">
<script type="text/javascript" src="http://www.francescomalagrino.com/BootstrapPageGenerator/3/js/bootstrap.min.js"></script>
</head>
<body>
<div class="container-fluid">
<div class="row-fluid">
<div class="span12">
<div class="page-header">
<h1>
this is Pan show time
</h1>
</div>
<?php if(is_array($msgs)&&count($msgs)>0):?>
<table class="table">
<thead>
<tr>
<th>
编号
</th>
<th>
用户
</th>
<th>
标题
</th>
<th>
时间
</th>
<th>
内容
</th>
</tr>
</thead>
<tbody>
<?php $i=1;foreach($msgs as $val):?>
<tr class="success">
<td>
<?php echo $i++; ?>
</td>
<td>
<?php echo $var['username']; ?>
</td>
<td>
<?php echo $var['title']; ?>
</td>
<td>
<?php echo date("Y-m-d H:i:s",$var['time']);?>
</td>
<td>
<?php echo $val['content'];?>
</td>
</tr>
<?php endforeach; ?>
</tbody>
</table>
<?php endif;?>
<form action="#" method="post">
<fieldset>
<legend>留言处</legend>
<label>用户名</label>
<input type="text" name="username" required>
<label>标题</label>
<input type="text" name="title" required>
<label>内容</label>
<textarea name="content" cols="30" rows="5" required></textarea>
<hr color="pink">
<button type="submit" name="pubmsg" class="btn">提交</button>
</fieldset>
</form>
</div>
</div>
</div>
</body>
</html>
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