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HomeBackend DevelopmentPHP Problemphp jumps to WeChat browser to open

With the popularity of WeChat, many websites hope to promote their content through WeChat. However, when users use WeChat Browser to access the site on their mobile phones, some functions may not work properly because WeChat Browser is not exactly the same as desktop browsers. One of the common questions for PHP developers is how to open a link in WeChat browser. This article will introduce how to write a function using PHP to achieve this functionality.

Understanding WeChat Browser

Before we delve into how to write PHP functions, we need to understand some basic knowledge about WeChat Browser. WeChat Browser is a browser based on Webkit. Its UA (User Agent) string is similar to Safari, except that it contains the WeChat identifier. This also means that if we want to detect whether the browser is WeChat, we only need to check whether the UA string contains "MicroMessenger".

Implement PHP function

Now that we have understood some basic knowledge of WeChat browser, let us take a look at how to write a PHP function to open a link in WeChat browser function.

function openInWeixin($url) {
    $agent = isset($_SERVER['HTTP_USER_AGENT']) ? strtolower($_SERVER['HTTP_USER_AGENT']) : '';
    if (strpos($agent, 'micromessenger') !== false) {
        header("location: weixin://dl/business/?url=" . urlencode($url));
    } else {
        header("location: $url");
    }
}

This function is very simple. First, it checks the user agent string to determine whether the user opened the link in WeChat. If the user opens a link in WeChat, it will open the link using the WeChat protocol (weixin://). Otherwise, it will open the link using the normal HTTP protocol.

In the WeChat protocol, you can use the following parameters to specify the URL to be opened:

weixin://dl/business/?url=https%3A%2F%2Fexample.com

The actual effect of this link is to open a new Webview in WeChat and then load the specified URL. Note that url parameters must be URL encoded to ensure they are in a legal URL format.

Sample Code

If you want to use the PHP function we wrote, you can copy the following code into your project and call it:

function openInWeixin($url) { 
    $agent = isset($_SERVER['HTTP_USER_AGENT']) ? strtolower($_SERVER['HTTP_USER_AGENT']) : ''; 
    if (strpos($agent, 'micromessenger') !== false) { 
        header("location: weixin://dl/business/?url=" . urlencode($url)); 
    } else { 
        header("location: $url"); 
    } 
}

For example, if you If you want to open the page https://example.com in WeChat, you can call the function like this:

openInWeixin('https://example.com');

Summary

In this article, we introduced how to use PHP to write a function to implement The function of opening links in WeChat browser. Whether you are developing a website or promoting your own content, this feature is very useful. The code examples in this article can help you easily integrate this functionality into your PHP projects.

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