Check if file exists

[talkster5]

I am currently trying to detect whether a file exists where I am uploading a file to via a web form but I am having trouble trying to get the string right. At the moment I have:

$filename = '/uploads/$destination_file';
if (file_exists($filename)) { 
print "The file $filename already exists"; 
} else { 
// upload the file
$upload = ftp_put($conn_id, $destination_file, $source_file, FTP_BINARY); 
}

The bit I am unsure about how to to is:

$filename = '/uploads/$destination_file';

Destination_file is set earlier in the script but I am not sure how to put it together so it checks in the uploads folder if that file exists. If anyone could help me out that would be great.

[Roger_Ramjet]

scandir will read and return the directory contents in an array. Take it from there.