提取文件名

Question

Let's say I have a string like:

Cant_Hold_Us_-_Fingerstyle_Guitar_0.mp3

How can I get rid of _0.mp3 dynamically with PHP? The values are not hard-coded for the current example. Maybe if i use explode?

Answer 1

$old = "your file name here";
$new = substr($old, 0, strrpos($old, "_"));

The substr method will take only the part of the string that you want.

The strrpos method finds the last index of the underscore and passes that number into the substr method so that it knows how far to cut. This method is ideal because rather than hardcoding a specific value, the script will dynamically change for each file, just as you suggested.

Just a bit of warning: if the file name does not contain an underscore, the method won't know where to cut to and will cause error in execution. A good bit of practice would be checking if (strrpos($old, "_") !== false).