我的php代码如下：
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>网络留言板</title>
</head>
<body>
<?php
//error_reporting(E_ALL & ~E_NOTICE);
function write_message($file_name, $message)
{
$fp = fopen($file_name, "a"); //以追加模式打开文件
if(flock($fp, LOCK_EX))
{
fwrite($fp, $message);
flock($fp, LOCK_UN);
}
else
{
echo "不能锁定文件<br>";
}
fclose($fp); //关闭文件资源
}
//自定义一个遍历读取文件的函数
function read_message($file_name)
{
$fp = fopen($file_name, "r"); //以只读模式打开文件
flock($fp, LOCK_SH);
$buffer = "";
while(!feof($fp))
{
$buffer .= fread($fp, 1024);
}
$data = explode("<|>", $buffer);
unset($data[count($data)-1]);
foreach($data as $line)
{
$arr = explode("||", $line);
list($user_name, $title, $message) = $arr;
if($user_name != "" && $title != "" && $message != "")
{
echo $user_name.'说 ';
echo " ".$title.' ';
echo $message."<hr />";
}
}
flock($fp, LOCK_UN);
fclose($fp);
}