12.3.4 简单留言版

12.3.4 简单留言版

test.php

<?php
    header("Content-Type:text/html;charset=utf8");
    $filename = "message.txt";

    //如果用户提交了， 就写入文件， 按一定格式写入
    if(isset($_POST['dosubmit'])) {
        //字段的分隔使用||, 行的分隔使用[n]
        $mess = "{$_POST['username']}||".time()."||{$_POST['title']}||{$_POST['content']}[n]";

        writemessage($filename, $mess);

    }



    if(file_exists($filename)) {
        readmessage($filename);
    }


    function writemessage($filename, $mess) {
        $fp = fopen($filename, "a");
        
        fwrite($fp, $mess);

        fclose($fp);
    }

    function readmessage($filename) {
        $mess = file_get_contents($filename);
        
        $mess = rtrim($mess, "[n]");

        $arrmess = explode("[n]", $mess);

        foreach($arrmess as $m) {
            list($username, $dt ,$title, $content) = explode("||", $m);

            echo "<b>{$username}</b>, ".date("Y-m-d H:i").": <i>{$title}</i>, <u>{$content}</u><br><hr><br>";
        }

    }


?>



<form action="message.php" method="post">
    用户: <input type="text" name="username" value="" /><br>
    标题：<input type="text" name="title" value="" /><br>
    内容：<textarea  name="content" cols="40" rows="4"></textarea><br>
    <input type="submit" name="dosubmit" value="留言" /><br>
</form>