判断用户PC电脑端和手机移动端，不同客户端显示不同的内容是WordPress必不可少的功能，通过php通过http_user_agent即可判断用户的客户端，新手站长网分享PC电脑端和移动手机端显示不同内容的方法：

一：在functions.php中加入如下代码

找到你的WordPress主题中的functions.php文件，在functions.php中插入以下代码：

// 判断PC端
function is_pc() {
        $user_agent = $_SERVER['HTTP_USER_AGENT'];
        $mobile_browser = Array(
                "mqqbrowser", //手机QQ浏览器
                "opera mobi", //手机opera
                "juc","iuc",//uc浏览器
                "fennec","ios","applewebKit/420","applewebkit/525","applewebkit/532","ipad","iphone","ipaq","ipod",
                "iemobile", "windows ce",//windows phone
                "240x320","480x640","acer","android","anywhereyougo.com","asus","audio","blackberry","blazer","coolpad" ,"dopod", "etouch", "hitachi","htc","huawei", "jbrowser", "lenovo","lg","lg-","lge-","lge", "mobi","moto","nokia","phone","samsung","sony","symbian","tablet","tianyu","wap","xda","xde","zte"
        );
        $is_mobile = ture;
        foreach ($mobile_browser as $device) {
                if (stristr($user_agent, $device)) {
                        $is_mobile = false;
                        break;
                }
        }
        return $is_mobile;
}

// 判断手机端
function is_mobile() {
        $user_agent = $_SERVER['HTTP_USER_AGENT'];
        $mobile_browser = Array(
                "mqqbrowser", //手机QQ浏览器
                "opera mobi", //手机opera
                "juc","iuc",//uc浏览器
                "fennec","ios","applewebKit/420","applewebkit/525","applewebkit/532","ipad","iphone","ipaq","ipod",
                "iemobile", "windows ce",//windows phone
                "240x320","480x640","acer","android","anywhereyougo.com","asus","audio","blackberry","blazer","coolpad" ,"dopod", "etouch", "hitachi","htc","huawei", "jbrowser", "lenovo","lg","lg-","lge-","lge", "mobi","moto","nokia","phone","samsung","sony","symbian","tablet","tianyu","wap","xda","xde","zte"
        );
        $is_mobile = false;
        foreach ($mobile_browser as $device) {
                if (stristr($user_agent, $device)) {
                        $is_mobile = ture;
                        break;
                }
        }
        return $is_mobile;
}

二：WordPress模板中调用

在WP模板中调用，如index.php、footer.php、single.php等，调用方式：
1、在PC电脑端显示，移动端不显示

<?php if (is_pc() ): ?>
	<div>
    <p>我在PC电脑端显示</p>
	</div>
<?php endif ;?>

2、在移动端显示，PC端不显示

<?php if (is_mobile() ): ?>
	<div>
    <p>我在移动端显示，不在PC端显示</p>
	</div>
<?php endif ;?>

综上，第一步在主题下的functions.php文件中插入代码，然后再WordPress主题模板中调用即可。