PHP get everything in a string before underscore

Question

I have this code here:

$imagePreFix = substr($fileinfo[\'basename\'], strpos($fileinfo[\'basename\'], \"_\") +1);

this gets me everything after

Answer 1

If you want an old-school answer in the type of what you proposed you can still do the following:

$imagePreFix = substr($fileinfo['basename'], 0, strpos($fileinfo['basename'], "_"));