Use Composer to simplify mobile device detection and file download size calculations

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During project development, it is a common requirement to accurately determine whether users access the website through mobile devices. This not only affects the layout and content display of the website, but also affects the optimization of user experience. However, writing code manually to detect mobile device types is a tedious and error-prone task. In addition, I also need to provide file download function on the website and hope to be able to display the file size before downloading, which also requires some complex logic.

Fortunately, the Composer package weizhang/utilities provides several practical tool classes that helped me solve these problems easily. First, let’s take a look at how to use this package.

Install

Installing weizhang/utilities using Composer is very simple, just run the following command in the terminal:

 <code class="language-bash">composer require weizhang/utilities</code>

Detect mobile devices

This package provides a DeviceCheck class that is specifically used to detect whether a request comes from a mobile device. Here is an example of usage:

 <code class="language-php">use weizhang\utilities\DeviceCheck; $deviceCheck = new DeviceCheck(); $deviceCheck->setServerVar($_SERVER); $isMobile = $deviceCheck->isMobile(); if ($isMobile) { echo "This is a mobile device."; } else { echo "This is not a mobile device."; }</code>

This method determines the device type by analyzing the information in the $_SERVER variable, which is very convenient and accurate.

Get device type

In addition to detecting whether it is a mobile device, DeviceCheck class can also obtain more detailed device type information. Here is an example of how to get the device type:

 <code class="language-php">use weizhang\utilities\DeviceCheck; $deviceCheck = new DeviceCheck(); $deviceCheck->setServerVar([ 'HTTP_USER_AGENT' => 'Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:47.0) Gecko/20100101 Firefox/47.0', 'HTTP_ACCEPT' => 'text/plain; q=0.5, text/html,text/x-dvi; q=0.8, text/xc' ]); $deviceType = $deviceCheck->deviceType(); echo "Device Type: " . $deviceType;</code>

Get file download size

Showing file size is a very practical feature when processing file downloads. The Requests class in weizhang/utilities package provides a getDownloadSize method, which can easily get the download size of the file:

 <code class="language-php">use weizhang\utilities\Requests; $file = new Requests(); $size = $file->getDownloadSize(['https://filepath.com']); // size returns is in bytes echo "File size: " . $size . " bytes";</code>

Through these tool classes, I not only solved the problems of device detection and file size calculation, but also greatly simplified the code and improved development efficiency.

Summarize

Using the weizhang/utilities package not only solves the practical problems I encountered in my project, but also demonstrates the importance of Composer in modern PHP development. Through Composer, we can easily integrate various powerful third-party libraries, reduce duplicate development, improve code quality and development efficiency. If you encounter similar problems, you might as well try this package, and I believe it can bring convenience to your project.

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