Question

How can i test if a directory already exist and if not create one in PHP?

Answer 1

Try this:

$filename = "/tmp";
if (!file_exists($filename))
    echo $filename, " does not exist";
elseif (!is_dir($filename))
    echo $filename, " is not a directory";
else
    echo "Directory ", $filename, " already exists";

file_exists checks if the path/file exists and is_dir checks whether the given filename is a directory.

Edit:

to create the directory afterwards, call

mkdir($filename);