This function will extract the file extension from a string that represents a filename. It retrieves the characters after the last dot and returns them as a new string.
1. function GetExt($Filename)
2. {
3. $Extension = explode(".", $Filename);
4. $Extension_i = (count($Extension) - 1);
5. return $Extension[$Extension_i];
6. }
7.
8. // How to use it
9. $Extension = GetExt("Lost.wmv");
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