How to exit the script if the directories already exist?

Question

Bellow there is a PHP code to make multiple directories inside the current directory.
I need to terminate the script in case the directories already exist.
But instead, I get multiple "file exists" warning messages.

Code

<?php

//Creates multiple directories inside the current directory.

$curdir = getcwd();
$slash = "/0";

for ($dir = 1; $dir <= 12; $dir++){

      $concat = $slash . $dir;

      if (!file_exists($concat)) {

        mkdir($curdir . "$concat" , 0777);

      } else {

        exit("Files already exist.");

      }

} 

?>

Output

Warning: mkdir(): File exists in /opt/lampp/htdocs/SQL/mkdir.php on line 14

Warning: mkdir(): File exists in /opt/lampp/htdocs/SQL/mkdir.php on line 14

Warning: mkdir(): File exists in /opt/lampp/htdocs/SQL/mkdir.php on line 14

Warning: mkdir(): File exists in /opt/lampp/htdocs/SQL/mkdir.php on line 14

Warning: mkdir(): File exists in /opt/lampp/htdocs/SQL/mkdir.php on line 14

Warning: mkdir(): File exists in /opt/lampp/htdocs/SQL/mkdir.php on line 14

Warning: mkdir(): File exists in /opt/lampp/htdocs/SQL/mkdir.php on line 14

Warning: mkdir(): File exists in /opt/lampp/htdocs/SQL/mkdir.php on line 14

Warning: mkdir(): File exists in /opt/lampp/htdocs/SQL/mkdir.php on line 14

Warning: mkdir(): File exists in /opt/lampp/htdocs/SQL/mkdir.php on line 14

Warning: mkdir(): File exists in /opt/lampp/htdocs/SQL/mkdir.php on line 14

Warning: mkdir(): File exists in /opt/lampp/htdocs/SQL/mkdir.php on line 14

Answer 1

You have to edit your if statement. You are checking a different directory than what you were creating:

<?php

$curdir = getcwd();
$slash = "/0";

for ($dir = 1; $dir <= 12; $dir++){

      $concat = $slash . $dir;

      if (!file_exists($curdir . $concat)) {

        mkdir($curdir . $concat , 0777);

      } else {

        exit("Files already exist.");

      }

}