你提供的代码是一个用于检测用户是否通过移动设备访问网站的方法,并根据检测结果将用户重定向到指定的移动版首页。这个方法是基于用户代理字符串(User Agent String)来判断设备类型的。
### 代码解析:
1. **`it618_is_mobile()` 函数**:
- 这个函数通过检查 `$_SERVER['HTTP_USER_AGENT']` 来判断用户是否通过移动设备访问。
- 它遍历了一个包含常见移动设备标识符的数组 `$mobile_agents`,如果用户代理字符串中包含这些标识符中的任何一个,函数将返回 `true`,表示用户是通过移动设备访问的。
2. **重定向逻辑**:
- 在 `index.php` 文件的第一行,调用 `it618_is_mobile()` 函数进行检测。
- 如果检测结果为 `true`,则通过 `header("location:http://www.cnit618.com/credits_wap.html");` 将用户重定向到指定的移动版首页,并使用 `exit;` 终止脚本的继续执行。
### 修改建议:
1. **自定义首页链接**:
- 你需要将 `header("location:http://www.cnit618.com/credits_wap.html");` 中的链接替换为你希望移动用户访问的首页链接。
2. **优化设备检测**:
- 当前的设备检测方法是通过遍历一个包含常见移动设备标识符的数组来实现的。这种方法虽然简单,但可能不够全面。你可以考虑使用更先进的设备检测库,如 `Mobile_Detect`,它提供了更全面的设备检测功能。
3. **代码位置**:
- 确保将这段代码放在 `index.php` 文件的最顶部,以确保在任何其他代码执行之前进行设备检测和重定向。
### 示例代码:
- <?php
- if(it618_is_mobile()){
- header("location:http://www.yourdomain.com/mobile_homepage.html");
- exit;
- }
- function it618_is_mobile(){
- $user_agent = $_SERVER['HTTP_USER_AGENT'];
- $mobile_agents = Array("240x320","acer","acoon","acs-","abacho","ahong","airness","alcatel","amoi","android","anywhereyougo.com","applewebkit/525","applewebkit/532","asus","audio","au-mic","avantogo","becker","benq","bilbo","bird","blackberry","blazer","bleu","cdm-","compal","coolpad","danger","dbtel","dopod","elaine","eric","etouch","fly ","fly_","fly-","go.web","goodaccess","gradiente","grundig","haier","hedy","hitachi","htc","huawei","hutchison","inno","ipad","ipaq","ipod","jbrowser","kddi","kgt","kwc","lenovo","lg ","lg2","lg3","lg4","lg5","lg7","lg8","lg9","lg-","lge-","lge9","longcos","maemo","mercator","meridian","micromax","midp","mini","mitsu","mmm","mmp","mobi","mot-","moto","nec-","netfront","newgen","nexian","nf-browser","nintendo","nitro","nokia","nook","novarra","obigo","palm","panasonic","pantech","philips","phone","pg-","playstation","pocket","pt-","qc-","qtek","rover","sagem","sama","samu","sanyo","samsung","sch-","scooter","sec-","sendo","sgh-","sharp","siemens","sie-","softbank","sony","spice","sprint","spv","symbian","tablet","talkabout","tcl-","teleca","telit","tianyu","tim-","toshiba","tsm","up.browser","utec","utstar","verykool","virgin","vk-","voda","voxtel","vx","wap","wellco","wig browser","wii","windows ce","wireless","xda","xde","zte");
- $is_mobile = false;
- foreach ($mobile_agents as $device) {
- if (stristr($user_agent, $device)) {
- $is_mobile = true;
- break;
- }
- }
- return $is_mobile;
- }
- ?>
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### 注意事项:
- **SEO 影响**:频繁的重定向可能会对 SEO 产生负面影响,建议在实施前进行充分的测试。
- **用户体验**:确保移动版首页的内容和布局适合移动设备浏览,以提供良好的用户体验。
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