直接上程式碼：

一、寫入和顯示已寫入檔案內容：

<?php
header("Content-type: text/html; charset=utf-8");
$name = "無";
// echo "\n開始\n";
// var_dump($_GET);

//首先看是否傳值過來了，如果有就寫入檔案
if($_POST['name']&&$_POST['type']){
    $name = $_POST['name'];
    $myfile = fopen("./wxm.txt", "w") or die("Unable to open file!!W");
    fwrite($myfile, $name);
    fclose($myfile);
}


$type = time();
$myfile = fopen("./wxm.txt", "r") or die("Unable to open file!!R");
$name = fread($myfile, filesize("./wxm.txt"));
fclose($myfile);

// 直接展示當前的數值，可提供提交的form表單

echo "<form action=\"./qiang.php\" method=\"post\" class=\"form-horizontal\" enctype=\"multipart/form-data\">
            <label><span style=\"color: red;\">*</span>請輸入當前公眾號名字：</label>
            <input type=\"hidden\" name='type'  value=\"".$type."\">
            <input type=\"text\" name='name'  value=\"".$name."\"  placeholder=\"請輸入公眾號名字\">
            <button type=\"submit\" class=\"btn btn-primary\">提交設定</button>
          </form>";