ThinkPHP6.0学习之项目安装页面的开发

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在我们做一个项目的时候，如果是自己用或者是给同行用的话往往不需要做一个安装页面的，但是如果是将项目给一些不怎么会操作服务器，不怎么会程序的人用的时候，我们就需要一个安装页面来帮助他们更好的将项目安装好。废话补多少了，我们直接开始教学吧，我这个是基于tp6.0上的，如果不是tp6.0也可以使用，稍作修改就行了，按自己的需求来。

首先，我们先从入口文件入手，先判断一下是否已经安装好项目了，我们通过文件锁来进行判断。判断是否存在install.lock文件，如果存在证明已经安装了，否则就还没有安装，就需要跳转到安装页面了，代码如下：

// [ 应用入口文件 ]namespace think;// 定义目录分隔符define('DS', DIRECTORY_SEPARATOR);// 定义根目录define('ROOT_PATH', __DIR__ . DS . '..' . DS);// 定义应用目录define('APP_PATH', ROOT_PATH . 'app' . DS);// 判断是否安装了项目if (!is_file(APP_PATH . 'install/install.lock')){ header("location:./install.php"); exit;}require __DIR__ . '/../vendor/autoload.php';// 执行HTTP应用并响应$http = (new App())->http;$response = $http->run();$response->send();$http->end($response);

我们需要再public文件夹下新建一个install.php的文件。还有在app文件夹下创建一个install文件夹，并将我们项目的数据库命名为install.sql放到install文件夹下面。

我们先定义几个常量和会用到的变量，方便以后使用。

// 定义目录分隔符define('DS', DIRECTORY_SEPARATOR);// 定义根目录define('ROOT_PATH', __DIR__ . DS . '..' . DS);// 定义应用目录define('APP_PATH', ROOT_PATH . 'app' . DS);// 安装包目录define('INSTALL_PATH', APP_PATH . 'install' . DS);//项目名称$sitename = "tp6";//链接$link = array( 'qqun' => "", 'home' => '', 'doc' => '',);// 检测目录是否存在，这个可以按自己的需求进行修改$checkDirs = [ 'vendor'];//缓存目录$runtimeDir = APP_PATH . 'runtime';//错误信息$errInfo = '';//数据库配置文件$dbConfigFile = ROOT_PATH. 'config'. DS. 'database.php';//后台入口文件$adminFile = ROOT_PATH . 'public' . DS . 'admin.php';// 锁定的文件$lockFile = INSTALL_PATH . 'install.lock';

定义好后，我们先写个函数来判断特定文件或文件夹的读写权限，如果没有读写权限的话，我们是没法操作的，Windows系统一般不用担心这个问题，如果是Linux的话需要我们去修改一下权限为777。

// 判断文件或目录是否有写的权限

接下来我们就要进行一系列的判断，这个主要是为了能够正常安装项目，首先需要判断是否已经安装了项目，然后就是环境的判断，比如PHP版本是否大于或等于7.1.0，是否开启了PDO，数据库配置文件是否可读写等等。来，直接上代码：

// 当前是POST请求if (isset($_SERVER['REQUEST_METHOD']) && $_SERVER['REQUEST_METHOD'] == 'POST') { if ($errInfo) {//错误信息 echo $errInfo; exit; } $err = ''; $mysqlHostname = isset($_POST['mysqlHost']) ? $_POST['mysqlHost'] : '127.0.0.1';//数据库地址 $mysqlHostport = isset($_POST['mysqlHostport']) ? $_POST['mysqlHostport'] : 3306;//端口号 $hostArr = explode(':', $mysqlHostname);//如果数据库地址中填写了端口号，将他们分开 if (count($hostArr) > 1) { $mysqlHostname = $hostArr[0]; $mysqlHostport = $hostArr[1]; } $mysqlUsername = isset($_POST['mysqlUsername']) ? $_POST['mysqlUsername'] : 'root';//用户名 $mysqlPassword = isset($_POST['mysqlPassword']) ? $_POST['mysqlPassword'] : '';//密码 $mysqlDatabase = isset($_POST['mysqlDatabase']) ? $_POST['mysqlDatabase'] : 'tp6';//数据库名 $mysqlPrefix = isset($_POST['mysqlPrefix']) ? $_POST['mysqlPrefix'] : 'tp_';//前缀 $adminUsername = isset($_POST['adminUsername']) ? $_POST['adminUsername'] : 'admin';//后台管理者用户名 $adminPassword = isset($_POST['adminPassword']) ? $_POST['adminPassword'] : '123456';//后台管理者密码 $adminPasswordConfirmation = isset($_POST['adminPasswordConfirmation']) ? $_POST['adminPasswordConfirmation'] : '123456';//重复密码 $adminEmail = isset($_POST['adminEmail']) ? $_POST['adminEmail'] : 'admin@admin.com';//邮箱 if (!preg_match("/^\w{3,12}$/", $adminUsername)) { echo "用户名只能由3-12位数字、字母、下划线组合"; exit; } if (!preg_match("/^[\S]{6,16}$/", $adminPassword)) { echo "密码长度必须在6-16位之间，不能包含空格"; exit; } if ($adminPassword !== $adminPasswordConfirmation) { echo "两次输入的密码不一致"; exit; } try { //检测能否读取安装文件 $sql = @file_get_contents(INSTALL_PATH . 'install.sql'); if (!$sql) { throw new Exception("无法读取app/install/install.sql文件，请检查是否有读权限"); } $sql = str_replace("`fa_", "`{$mysqlPrefix}", $sql); $pdo = new PDO("mysql:host={$mysqlHostname};port={$mysqlHostport}", $mysqlUsername, $mysqlPassword, array( PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION, PDO::MYSQL_ATTR_INIT_COMMAND => "SET NAMES utf8" )); //检测是否支持innodb存储引擎 $pdoStatement = $pdo->query("SHOW VARIABLES LIKE 'innodb_version'"); $result = $pdoStatement->fetch(); if (!$result) { throw new Exception("当前数据库不支持innodb存储引擎，请开启后再重新尝试安装"); } $pdo->query("CREATE DATABASE IF NOT EXISTS `{$mysqlDatabase}` CHARACTER SET utf8 COLLATE utf8_general_ci;"); $pdo->query("USE `{$mysqlDatabase}`"); $pdo->exec($sql); $config = @file_get_contents($dbConfigFile); $callback = function ($matches) use ($mysqlHostname, $mysqlHostport, $mysqlUsername, $mysqlPassword, $mysqlDatabase, $mysqlPrefix) { $field = ucfirst($matches[1]);//首字符大写 $replace = ${"mysql{$field}"};//$mysqlHostname,$mysqlHostport,$mysqlUsername,$mysqlPassword,$mysqlDatabase,$mysqlPrefix if ($matches[1] == 'hostport' && $mysqlHostport == 3306) { $replace = ''; } return "'{$matches[1]}'{$matches[2]}=>{$matches[3]}env('database.{$matches[1]}', '{$replace}'),"; }; $config = preg_replace_callback("/'(hostname|database|username|password|hostport|prefix)'(\s+)=>(\s+)env$(.*)$\,/", $callback, $config); //检测能否成功写入数据库配置 $result = @file_put_contents($dbConfigFile, $config); if (!$result) { throw new Exception("无法写入数据库信息到config/database.php文件，请检查是否有写权限"); } //检测能否成功写入lock文件 $result = @file_put_contents($lockFile, 1); if (!$result) { throw new Exception("无法写入安装锁定到app/install/install.lock文件，请检查是否有写权限"); } $newSalt = substr(md5(uniqid(true)), 0, 6); $newPassword = md5(md5($adminPassword) . $newSalt); $pdo->query("UPDATE {$mysqlPrefix}admin SET username = '{$adminUsername}', email = '{$adminEmail}',password = '{$newPassword}', salt = '{$newSalt}' WHERE username = 'admin'"); $adminName = ''; if (is_file($adminFile)) {//修改后台入口文件名 $x = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'; $adminName = substr(str_shuffle(str_repeat($x, ceil(10 / strlen($x)))), 1, 10) . '.php'; rename($adminFile, ROOT_PATH . 'public' . DS . $adminName); } echo "success|{$adminName}"; } catch (PDOException $e) { $err = $e->getMessage(); } catch (Exception $e) { $err = $e->getMessage(); } echo $err; exit;}

下面是完整的代码：

<?php
/**
* 安装完成后建议删除此文件
*/
// error_reporting(E_ERROR | E_WARNING | E_PARSE | E_NOTICE);
// ini_set('display_errors', '1');
// 定义目录分隔符
define('DS', DIRECTORY_SEPARATOR);// 定义根目录
define('ROOT_PATH', __DIR__ . DS . '..' . DS);// 定义应用目录
define('APP_PATH', ROOT_PATH . 'app' . DS);// 安装包目录
define('INSTALL_PATH', APP_PATH . 'install' . DS);// 判断文件或目录是否有写的权限
function is_really_writable($file)
{
if (DIRECTORY_SEPARATOR == '/' AND @ ini_get("safe_mode") == false) {
return is_writable($file);
}
if (!is_file($file) OR ($fp = @fopen($file, "r+")) === false) {
return false;
}
fclose($fp);
return true;
}$sitename = "tp6";$link = array(
'qqun' => "",
'home' => '',
'doc' => '',
);// 检测目录是否存在
$checkDirs = [
'vendor'
// 'public' . DS . 'assets' . DS . 'libs'
];
//缓存目录
$runtimeDir = APP_PATH . 'runtime';//错误信息
$errInfo = '';//数据库配置文件
$dbConfigFile = ROOT_PATH. 'config'. DS. 'database.php';//后台入口文件
$adminFile = ROOT_PATH . 'public' . DS . 'admin.php';// 锁定的文件
$lockFile = INSTALL_PATH . 'install.lock';if (is_file($lockFile)) {
$errInfo = "当前已经安装{$sitename}，如果需要重新安装，请手动移除app/install/install.lock文件";
} else {
if (version_compare(PHP_VERSION, '7.1.0', '<')) {
$errInfo = "当前版本(" . PHP_VERSION . ")过低，请使用PHP7.1.0以上版本";
} else {
if (!extension_loaded("PDO")) {
$errInfo = "当前未开启PDO，无法进行安装";
} else {
if (!is_really_writable($dbConfigFile)) {
$open_basedir = ini_get('open_basedir');
if ($open_basedir) {
$dirArr = explode(PATH_SEPARATOR, $open_basedir);
if ($dirArr && in_array(__DIR__, $dirArr)) {
$errInfo = '当前服务器因配置了open_basedir，导致无法读取父目录<br>';
}
}
if (!$errInfo) {
$errInfo = '当前权限不足，无法写入配置文件config/database.php<br>';
}
} else {
$dirArr = [];
foreach ($checkDirs as $k => $v) {
if (!is_dir(ROOT_PATH . $v)) {
$errInfo = '当前代码仅包含核心代码，请前往官网下载完整包或资源包覆盖后再尝试安装，';
break;
}
}
}
}
}
}// 当前是POST请求
if (isset($_SERVER['REQUEST_METHOD']) && $_SERVER['REQUEST_METHOD'] == 'POST') {
if ($errInfo) {//错误信息
echo $errInfo;
exit;
}
$err = '';
$mysqlHostname = isset($_POST['mysqlHost']) ? $_POST['mysqlHost'] : '127.0.0.1';//数据库地址
$mysqlHostport = isset($_POST['mysqlHostport']) ? $_POST['mysqlHostport'] : 3306;//端口号
$hostArr = explode(':', $mysqlHostname);//如果数据库地址中填写了端口号，将他们分开
if (count($hostArr) > 1) {
$mysqlHostname = $hostArr[0];
$mysqlHostport = $hostArr[1];
}
$mysqlUsername = isset($_POST['mysqlUsername']) ? $_POST['mysqlUsername'] : 'root';//用户名
$mysqlPassword = isset($_POST['mysqlPassword']) ? $_POST['mysqlPassword'] : '';//密码
$mysqlDatabase = isset($_POST['mysqlDatabase']) ? $_POST['mysqlDatabase'] : 'tp6';//数据库名
$mysqlPrefix = isset($_POST['mysqlPrefix']) ? $_POST['mysqlPrefix'] : 'tp_';//前缀
$adminUsername = isset($_POST['adminUsername']) ? $_POST['adminUsername'] : 'admin';//后台管理者用户名
$adminPassword = isset($_POST['adminPassword']) ? $_POST['adminPassword'] : '123456';//后台管理者密码
$adminPasswordConfirmation = isset($_POST['adminPasswordConfirmation']) ? $_POST['adminPasswordConfirmation'] : '123456';//重复密码
$adminEmail = isset($_POST['adminEmail']) ? $_POST['adminEmail'] : 'admin@admin.com';//邮箱 if (!preg_match("/^\w{3,12}$/", $adminUsername)) {
echo "用户名只能由3-12位数字、字母、下划线组合";
exit;
}
if (!preg_match("/^[\S]{6,16}$/", $adminPassword)) {
echo "密码长度必须在6-16位之间，不能包含空格";
exit;
}
if ($adminPassword !== $adminPasswordConfirmation) {
echo "两次输入的密码不一致";
exit;
} try {
//检测能否读取安装文件
$sql = @file_get_contents(INSTALL_PATH . 'install.sql');
if (!$sql) {
throw new Exception("无法读取app/install/install.sql文件，请检查是否有读权限");
}
$sql = str_replace("`fa_", "`{$mysqlPrefix}", $sql);
$pdo = new PDO("mysql:host={$mysqlHostname};port={$mysqlHostport}", $mysqlUsername, $mysqlPassword, array(
PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION,
PDO::MYSQL_ATTR_INIT_COMMAND => "SET NAMES utf8"
)); //检测是否支持innodb存储引擎
$pdoStatement = $pdo->query("SHOW VARIABLES LIKE 'innodb_version'");
$result = $pdoStatement->fetch();
if (!$result) {
throw new Exception("当前数据库不支持innodb存储引擎，请开启后再重新尝试安装");
} $pdo->query("CREATE DATABASE IF NOT EXISTS `{$mysqlDatabase}` CHARACTER SET utf8 COLLATE utf8_general_ci;"); $pdo->query("USE `{$mysqlDatabase}`"); $pdo->exec($sql); $config = @file_get_contents($dbConfigFile);
$callback = function ($matches) use ($mysqlHostname, $mysqlHostport, $mysqlUsername, $mysqlPassword, $mysqlDatabase, $mysqlPrefix) {
$field = ucfirst($matches[1]);//首字符大写
$replace = ${"mysql{$field}"};//$mysqlHostname,$mysqlHostport,$mysqlUsername,$mysqlPassword,$mysqlDatabase,$mysqlPrefix
if ($matches[1] == 'hostport' && $mysqlHostport == 3306) {
$replace = '';
}
return "'{$matches[1]}'{$matches[2]}=>{$matches[3]}env('database.{$matches[1]}', '{$replace}'),";
};
$config = preg_replace_callback("/'(hostname|database|username|password|hostport|prefix)'(\s+)=>(\s+)env$(.*)$\,/", $callback, $config); //检测能否成功写入数据库配置
$result = @file_put_contents($dbConfigFile, $config);
if (!$result) {
throw new Exception("无法写入数据库信息到config/database.php文件，请检查是否有写权限");
} //检测能否成功写入lock文件
$result = @file_put_contents($lockFile, 1);
if (!$result) {
throw new Exception("无法写入安装锁定到app/install/install.lock文件，请检查是否有写权限");
} $newSalt = substr(md5(uniqid(true)), 0, 6);
$newPassword = md5(md5($adminPassword) . $newSalt);
$pdo->query("UPDATE {$mysqlPrefix}admin SET username = '{$adminUsername}', email = '{$adminEmail}',password = '{$newPassword}', salt = '{$newSalt}' WHERE username = 'admin'"); $adminName = '';
if (is_file($adminFile)) {//修改后台入口文件名
$x = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
$adminName = substr(str_shuffle(str_repeat($x, ceil(10 / strlen($x)))), 1, 10) . '.php';
rename($adminFile, ROOT_PATH . 'public' . DS . $adminName);
}
echo "success|{$adminName}";
} catch (PDOException $e) {
$err = $e->getMessage();
} catch (Exception $e) {
$err = $e->getMessage();
}
echo $err;
exit;
}
?>
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<title>安装<?php echo $sitename; ?></title>
<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, minimum-scale=1">
<meta name="renderer" content="webkit"> <style>
body {
background: #fff;
margin: 0;
padding: 0;
line-height: 1.5;
-webkit-font-smoothing: antialiased;
-moz-osx-font-smoothing: grayscale;
} body, input, button {
font-family: 'Source Sans Pro', 'Helvetica Neue', Helvetica, 'Microsoft Yahei', Arial, sans-serif;
font-size: 14px;
color: #7E96B3;
} .container {
max-width: 480px;
margin: 0 auto;
padding: 20px;
text-align: center;
} a {
color: #18bc9c;
text-decoration: none;
} a:hover {
text-decoration: underline;
} h1 {
margin-top: 0;
margin-bottom: 10px;
} h2 {
font-size: 28px;
font-weight: normal;
color: #3C5675;
margin-bottom: 0;
margin-top: 0;
} form {
margin-top: 40px;
} .form-group {
margin-bottom: 20px;
} .form-group .form-field:first-child input {
border-top-left-radius: 4px;
border-top-right-radius: 4px;
} .form-group .form-field:last-child input {
border-bottom-left-radius: 4px;
border-bottom-right-radius: 4px;
} .form-field input {
background: #EDF2F7;
margin: 0 0 1px;
border: 2px solid transparent;
transition: background 0.2s, border-color 0.2s, color 0.2s;
width: 100%;
padding: 15px 15px 15px 180px;
box-sizing: border-box;
} .form-field input:focus {
border-color: #18bc9c;
background: #fff;
color: #444;
outline: none;
} .form-field label {
float: left;
width: 160px;
text-align: right;
margin-right: -160px;
position: relative;
margin-top: 18px;
font-size: 14px;
pointer-events: none;
opacity: 0.7;
} button, .btn {
background: #3C5675;
color: #fff;
border: 0;
font-weight: bold;
border-radius: 4px;
cursor: pointer;
padding: 15px 30px;
-webkit-appearance: none;
} button[disabled] {
opacity: 0.5;
} .form-buttons {
height: 52px;
line-height: 52px;
} .form-buttons .btn {
margin-right: 5px;
} #error, .error, #success, .success, #warmtips, .warmtips {
background: #D83E3E;
color: #fff;
padding: 15px 20px;
border-radius: 4px;
margin-bottom: 20px;
} #success {
background: #3C5675;
} #error a, .error a {
color: white;
text-decoration: underline;
} #warmtips {
background: #ffcdcd;
font-size: 14px;
color: #e74c3c;
} #warmtips a {
background: #ffffff7a;
display: block;
height: 30px;
line-height: 30px;
margin-top: 10px;
color: #e21a1a;
border-radius: 3px;
}
</style>
</head><body>
<div class="container">
<h1>
<svg width="80px" height="96px" viewBox="0 0 768 830" version="1.1" xmlns="http://www.w3.org/2000/svg"
xmlns:xlink="http://www.w3.org/1999/xlink">
<g id="logo" stroke="none" stroke-width="1" fill="none" fill-rule="evenodd">
<path d="M64.433651,605.899968 C20.067302,536.265612 0,469.698785 0,389.731348 C0,174.488668 171.922656,0 384,0 C596.077344,0 768,174.488668 768,389.731348 C768,469.698785 747.932698,536.265612 703.566349,605.899968 C614.4,753.480595 441.6,870.4 384,870.4 C326.4,870.4 153.6,753.480595 64.433651,605.899968 L64.433651,605.899968 Z"
id="body" fill="#18BC9C"></path>
<path d="M429.648991,190.816 L430.160991,190.816 L429.648991,190.816 L429.648991,190.816 Z M429.648991,156 L427.088991,156 C419.408991,157.024 411.728991,160.608 404.560991,168.8 L403.024991,170.848 L206.928991,429.92 C198.736991,441.184 197.712991,453.984 204.368991,466.784 C210.512991,478.048 222.288991,485.728 235.600991,485.728 L336.464991,486.24 L304.208991,673.632 C301.648991,689.504 310.352991,705.376 325.200991,712.032 C329.808991,714.08 334.416991,714.592 339.536991,714.592 C349.776991,714.592 358.992991,709.472 366.160991,700.256 L561.744991,419.168 C569.936991,407.904 570.960991,395.104 564.304991,382.304 C557.648991,369.504 547.408991,363.36 533.072991,363.36 L432.208991,363.36 L463.952991,199.008 C464.464991,196.448 464.976991,193.376 464.976991,190.816 C464.976991,171.872 449.104991,156 431.184991,156 L429.648991,156 L429.648991,156 Z"
id="flash" fill="#FFFFFF"></path>
</g>
</svg>
</h1>
<h2>安装 <?php echo $sitename; ?></h2>
<div> <p>若你在安装中遇到麻烦可点击 <a href="<?php echo $link['doc']; ?>" target="_blank">安装文档</a> <a
href="<?php echo $link['forum']; ?>" target="_blank">问答社区</a> <a
href="<?php echo $link['qqun']; ?>">QQ交流群</a></p>
 <form method="post">
<?php if ($errInfo): ?>
<div class="error">
<?php echo $errInfo; ?>
</div>
<?php endif; ?>
<div id="error" style="display:none"></div>
<div id="success" style="display:none"></div>
<div id="warmtips" style="display:none"></div> <div class="form-group">
<div class="form-field">
<label>MySQL 数据库地址</label>
<input type="text" name="mysqlHost" value="127.0.0.1" required="">
</div> <div class="form-field">
<label>MySQL 数据库名</label>
<input type="text" name="mysqlDatabase" value="tp6" required="">
</div> <div class="form-field">
<label>MySQL 用户名</label>
<input type="text" name="mysqlUsername" value="root" required="">
</div> <div class="form-field">
<label>MySQL 密码</label>
<input type="password" name="mysqlPassword">
</div> <div class="form-field">
<label>MySQL 数据表前缀</label>
<input type="text" name="mysqlPrefix" value="fa_">
</div> <div class="form-field">
<label>MySQL 端口号</label>
<input type="number" name="mysqlHostport" value="3306">
</div>
</div> <div class="form-group">
<div class="form-field">
<label>管理者用户名</label>
<input name="adminUsername" value="admin" required=""/>
</div> <div class="form-field">
<label>管理者Email</label>
<input name="adminEmail" value="admin@admin.com" required="">
</div> <div class="form-field">
<label>管理者密码</label>
<input type="password" name="adminPassword" required="">
</div> <div class="form-field">
<label>重复密码</label>
<input type="password" name="adminPasswordConfirmation" required="">
</div>
</div> <div class="form-buttons">
<button type="submit" <?php echo $errInfo ? 'disabled' : '' ?>>点击安装</button>
</div>
</form> 
<script src="https://cdn.staticfile.org/jquery/2.1.4/jquery.min.js"></script> <script>
$(function () {
$('form :input:first').select(); $('form').on('submit', function (e) {
e.preventDefault();
var form = this;
var $button = $(this).find('button')
.text('安装中...')
.prop('disabled', true); $.post('', $(this).serialize())
.done(function (ret) {
if (ret.substr(0, 7) === 'success') {
var retArr = ret.split(/\|/);
$('#error').hide();
$(".form-group", form).remove();
$button.remove();
$("#success").text("安装成功！开始你的<?php echo $sitename; ?>之旅吧！").show(); $buttons = $(".form-buttons", form);
$('<a class="btn" href="./">访问首页</a>').appendTo($buttons); if (typeof retArr[1] !== 'undefined' && retArr[1] !== '') {
var url = location.href.replace(/install\.php/, retArr[1]);
$("#warmtips").html('温馨提示：请将以下后台登录入口添加到你的收藏夹，为了你的安全，不要泄漏或发送给他人！如有泄漏请及时修改！<a href="' + url + '">' + url + '</a>').show();
$('<a class="btn" href="' + url + '" id="btn-admin" style="background:#18bc9c">访问后台</a>').appendTo($buttons);
}
localStorage.setItem("fastep", "installed");
} else {
$('#error').show().text(ret);
$button.prop('disabled', false).text('点击安装');
$("html,body").animate({
scrollTop: 0
}, 500);
}
})
.fail(function (data) {
$('#error').show().text('发生错误:\n\n' + data.responseText);
$button.prop('disabled', false).text('点击安装');
$("html,body").animate({
scrollTop: 0
}, 500);
}); return false;
});
});
</script>
</div>
</div>
</body>
</html>