In this code to upload an image, how does mkdir work? I see in the php documentation that mkdir creates a directory but in the case that I show the directory is already created . This example works perfectly, I just want to know how it works mkdir do you create the folder or just choose the specified folder?
$id_banner=intval($_POST['id']);
$target_dir = "../../img/banner/";
$carpeta=$target_dir;
if (!file_exists($carpeta)) {
mkdir($carpeta, 0777, true);
}
mkdir As you already know, it only works to create a new directory in the path you specify, now in the code you indicate if the directory already exists with the file_exists , with this function it verifies whether or not there is a file or directory returning as a result a boolean (true / false or 0/1), if it is false, you send it to create the dir with the permido of 777 .
mkdir (Make Directory) creates a folder and returns true / false depending on whether the operation is successful. According to the PHP documentation .
bool mkdir (string $ directory [ int $ permissions = 0777 [ bool $ recursive = false [ resource $ context]]])
$ directory: Name of the folder
$ permissions: Folder permissions (not applicable on windows systems)
$ recursive: If you have several nested folders that do not exist, create one by one.
$ context: I / O flow.