We have talked so much about file processing systems, but we can't even write the most basic thing.

Starting from this section, you will find that you can write more and more things.

Next let’s take a look at the demonstration effect:

The form interface for writing message content in the following interface:

The display interface after leaving a message:

Let’s take a look at the file structure:

index.php ---Display input box and message content
write.php ---Write data to message.txt
message.txt ---Save chat content

index.php File

<?Php
//設(shè)置時(shí)區(qū)
date_default_timezone_set('PRC');
//讀了內(nèi)容
@$string = file_get_contents('message.txt');
//如果$string 不為空的時(shí)候執(zhí)行，也就是message.txt中有留言數(shù)據(jù)
if (!empty($string)) {
    //每一段留言有一個(gè)分格符，但是最后多出了一個(gè)&^。因此，我們要將&^刪掉
    $string = rtrim($string, '&^');
    //以&^切成數(shù)組
    $arr = explode('&^', $string);
    //將留言內(nèi)容讀取
    foreach ($arr as $value) {
        //將用戶名和內(nèi)容分開
        list($username, $content, $time) = explode('$#', $value);
        echo '用戶名為<font color="gree">' . $username . '</font>內(nèi)容為<font color="red">' . $content . '</font>時(shí)間為' . date('Y-m-d H:i:s', $time);
        echo '<hr />';
    }
}
?>
<h1>基于文件的留言本演示</h1>
<form action="write.php" method="post">
    用戶名：<input type="text" name="username" /><br />
    留言內(nèi)容：<textarea  name="content"></textarea><br />
    <input type="submit" value="提交" />
</form>

After looking at the display content just now, we know that when the file is stored:

1. The segments are divided into segments

2. The content is the same as what the user has previously used A special symbol is used to separate it.

Let’s write write.php code to write messages to the file:

<?php
//追加方式打開文件
$fp=fopen('message.txt','a');

//設(shè)置時(shí)間
$time=time();

//得到用戶名
$username=trim($_POST['username']);
//得到內(nèi)容
$content=trim($_POST['content']);


//組合寫入的字符串：內(nèi)容和用戶之間分開，使用$#
//行與行之間分開，使用&^
$string=$username.'$#'.$content.'$#'.$time.'&^';

//寫入文件
fwrite($fp,$string);

//關(guān)閉文件
fclose($fp);


header('location:index.php');

?>