A function to get the file extension (but the function name is called FILETYPE! Haha!)_PHP Tutorial

/*
GetFileType
Usage: GetFiletype($filename)
*/
function GetFiletype($Filename) {
if (substr_count($Filename, "." ) == 0) { // Check whether there is a . number in the file name.
return; // Return empty
} else if (substr($Filename, -1) == ".") { Check if it ends with ., that is, no extension
return; // Return empty
} else {
$FileType = strrchr ($Filename, "."); // Cut
from . number $FileType = substr($FileType, 1); // Remove . number
          return $FileType;                                                                                                                                         / Print out php4
?>





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