如何避免php中重复图片名称引起的麻烦

Question

All images are uploaded into image folder under my php project while reference goes into mysql table, but my confusion is, what if there are two images have the same name, are there better way to avoid duplicate naming happen? i know i cant control how will user naming their image file.

Answer 1

For security and yes to avoid duplicate you could change the filename to your own format,

example. formats $filename = sha1(time().$original_filename) or $filename = md5(time().$originalfilename) it is up to you.

One advantage of changing the filename is that if an attacker uploads something, you are sure he will not find it because of a different name,other than the already security validations you have provided.