How can PHP be used to create a folder with specific permissions?

To create a folder with specific permissions using PHP, you can use the `mkdir()` function to create the folder and then use the `chmod()` function to set the desired permissions. The `chmod()` function takes two parameters - the path to the folder and the permissions in octal format.

$folderName = 'new_folder';
$permissions = 0755; // for example, read/write/execute for owner, read/execute for group and others

// Create the folder
mkdir($folderName);

// Set the permissions for the folder
chmod($folderName, $permissions);