使用PHP上传之前调整照片大小

I am currently using Valums-File-Uploader to upload files to my server. The plugin uses javascript to load the images and uses php to save them. The drawback is that it does not re-size photos before uploading them; therefore taking more time to upload and using more resources. I came across a php script that does in fact re-size images but I do not know how to take the part that does the re-sizing and apply it to the Valums original file_uploader.php. Since my experience in php is limited, I wanted to know if it is possible to take such an approach. I will list both of the files for reference.I am currently using Valums-File-Uploader to up