The sql query in the beginning of the function will fetch the file names of previous versions.
If the sql query returns record sets, it means the file has previous versions. The while loop is executed to store version number generated, and the value obtained is stored in $Last_Version. Otherwise the new file name will be generated as file-name_VERSION1.
Next, if statement checks for $Last_Version != 0, if true, $Last_Version is incremented by 1 and new file name is assigned.
The return statement will return a new file name generated to the called statement.
File_Size() Function
This function returns the file size in terms of Bytes, Kb or Mb.
<?php
function File_Size($size)
{
if($size > 104876){
return $return_size=sprintf("%01.2f",$size / 104876)." Mb";
} elseif($size > 1024){
return $return_size=sprintf("%01.2f",$size / 1024)." Kb";
} else {
return $return_size=$size." Bytes";
}
}
?>
