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

I think the easiest way to do this is to use explode.

$arr = explode('_', $fileinfo['basename']);
echo $arr[0];

This will split the string into an array of substrings. The length of the array depends on how many instances of _ there was. For example

"one_two_three"

Would be broken into an array

["one", "two", "three"] 

Here's some documentation