上传从摄像头生成的图像到mysql数据库，php不工作

Trying to insert image generated from user webcam into mysql database with php, but it does not work. I am using webcam.js and everything works fine. When user takes a snapshot the image is stored on the server, however, the mysql insert does not perform the insert job. Any idea why its not working?Trying to insert image generated from user webc