Use PHP to call the camera to take photos in real time and add text watermarks

Use PHP to call the camera to take photos in real time and add text watermarks

Camera is one of the devices we often use in our lives. With the advancement of technology, we can use PHP language to call the camera to take photos in real time and add text. Watermarking is possible. This article will introduce how to implement this function through PHP, and attach code examples for reference.

First of all, we need to ensure that the camera has been installed on the computer and our PHP environment has been configured. Next, we will use the "video" tag to call the camera and display the footage captured by the camera in real time.

In the above code, we obtain the real-time image from the camera by using thegetUserMediamethod and display it in thevideotag. After the preparation is completed, next we will learn how to take photos and add text watermarks.

We can use thecanvastag to capture the current video screen into a picture and add a text watermark to the picture.

In the above code, we implement the function of taking photos by creating a button when the page is loaded. When the button is clicked, the video screen will first be drawn intocanvas. Then, we add text watermarks to the canvas through thefillTextmethod. Finally, use thetoDataURLmethod to convert the content on the canvas todataURL, which can be sent to the server for saving or other operations.So far, we have completed the function of calling the camera to take photos in real time and add text watermarks through PHP. You can modify and optimize the code according to actual needs, such as adding more text watermark styles, or saving photos locally, etc. Hope this article can be helpful to you.

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