How to check file exists in php using only extension like (* .pdf)

Question

$filename = '/www/test1/*.pdf'; if (file_exists($filename)) { echo "The file $filename exists"; } else { echo "The file $filename does not exist"; } 

I used the code above, but it checks the * .pdf file, but not for all files belonging to the .pdf extension

Answer 1

 $filename = '/www/test1/*.pdf'; if (count(glob($filename)) > 0) { echo "The file $filename exists"; } else { echo "The file $filename does not exist"; }