NOTE: This probably won’t work any longer. See Brian’s comment
If you want to only suppress the error, you can do this:
@unlink('your_file_name');
Generally, in PHP, @ will suppress any error.
The better way is minimize the error probability. You’ve say that one of error possibility is caused by non-exist file. If I were you, I’ll do this:
if(file_exists('your_file_name')){
unlink('your_file_name');
}else{
echo 'file not found';
}
Good luck 🙂