如果目录已经存在，如何退出脚本？

Question

下面有一个 PHP 代码可以在当前目录中创建多个目录。
如果目录已经存在，我需要终止脚本。
但相反，我收到多个“文件存在”警告消息。

代码

<?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.");

      }

} 

?>

输出

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

您必须编辑您的 if 语句。您正在检查与您创建的目录不同的目录：

<?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.");

      }

}