How can I directly generate an image file using the gd operation?

How can I directly generate an image file using the gd operation? Code like this (file1.php ):

I can only display the image in another file using such html code.

The result I want to achieve is to refresh a php file (web page) and generate an image file under its own directory (folder. It doesn't matter if you cannot see it on the web page. The image file name can be represented by a random character that is not repeated, and the text content on the image can also be random. This is not the focus. The key point is to refresh the webpage and get an image file.

Reply to discussion (solution)

ImagePng ($ img, "image file name ");

Add the path name to imagepng (image)