I want to create a directory if it does not exist already.
Is using the is_dir
function enough for that purpose?
if ( !is_dir( $dir ) ) {
mkdir( $dir );
}
Or should I combine is_dir
with file_exists
?
if ( !file_exists( $dir ) && !is_dir( $dir ) ) {
mkdir( $dir );
}
This question is related to
php
I had the same doubt, but see the PHP docu:
https://www.php.net/manual/en/function.file-exists.php
https://www.php.net/manual/en/function.is-dir.php
You will see that is_dir()
has both properties.
Return Values is_dir Returns TRUE if the filename exists and is a directory, FALSE otherwise.
This is how I do
if(is_dir("./folder/test"))
{
echo "Exist";
}else{
echo "Not exist";
}
A way to check if a path is directory can be following:
function isDirectory($path) {
$all = @scandir($path);
return $all !== false;
}
NOTE: It will return false for non-existant path too, but works perfectly for UNIX/Windows
$dirname = $_POST["search"];
$filename = "/folder/" . $dirname . "/";
if (!file_exists($filename)) {
mkdir("folder/" . $dirname, 0777);
echo "The directory $dirname was successfully created.";
exit;
} else {
echo "The directory $dirname exists.";
}
This is an old, but still topical question. Just test with the is_dir()
or file_exists()
function for the presence of the .
or ..
file in the directory under test. Each directory must contain these files:
is_dir("path_to_directory/.");
$save_folder = "some/path/" . date('dmy');
if (!file_exists($save_folder)) {
mkdir($save_folder, 0777);
}
I think realpath() may be the best way to validate if a path exist http://www.php.net/realpath
Here is an example function:
<?php
/**
* Checks if a folder exist and return canonicalized absolute pathname (long version)
* @param string $folder the path being checked.
* @return mixed returns the canonicalized absolute pathname on success otherwise FALSE is returned
*/
function folder_exist($folder)
{
// Get canonicalized absolute pathname
$path = realpath($folder);
// If it exist, check if it's a directory
if($path !== false AND is_dir($path))
{
// Return canonicalized absolute pathname
return $path;
}
// Path/folder does not exist
return false;
}
Short version of the same function
<?php
/**
* Checks if a folder exist and return canonicalized absolute pathname (sort version)
* @param string $folder the path being checked.
* @return mixed returns the canonicalized absolute pathname on success otherwise FALSE is returned
*/
function folder_exist($folder)
{
// Get canonicalized absolute pathname
$path = realpath($folder);
// If it exist, check if it's a directory
return ($path !== false AND is_dir($path)) ? $path : false;
}
Output examples
<?php
/** CASE 1 **/
$input = '/some/path/which/does/not/exist';
var_dump($input); // string(31) "/some/path/which/does/not/exist"
$output = folder_exist($input);
var_dump($output); // bool(false)
/** CASE 2 **/
$input = '/home';
var_dump($input);
$output = folder_exist($input); // string(5) "/home"
var_dump($output); // string(5) "/home"
/** CASE 3 **/
$input = '/home/..';
var_dump($input); // string(8) "/home/.."
$output = folder_exist($input);
var_dump($output); // string(1) "/"
Usage
<?php
$folder = '/foo/bar';
if(FALSE !== ($path = folder_exist($folder)))
{
die('Folder ' . $path . ' already exist');
}
mkdir($folder);
// Continue do stuff
Second variant in question post is not ok, because, if you already have file with the same name, but it is not a directory, !file_exists($dir)
will return false
, folder will not be created, so error "failed to open stream: No such file or directory"
will be occured. In Windows there is a difference between 'file' and 'folder' types, so need to use file_exists()
and is_dir()
at the same time, for ex.:
if (file_exists('file')) {
if (!is_dir('file')) { //if file is already present, but it's not a dir
//do something with file - delete, rename, etc.
unlink('file'); //for example
mkdir('file', NEEDED_ACCESS_LEVEL);
}
} else { //no file exists with this name
mkdir('file', NEEDED_ACCESS_LEVEL);
}
Well instead of checking both, you could do if(stream_resolve_include_path($folder)!==false)
. It is slower but kills two birds in one shot.
Another option is to simply ignore the E_WARNING
, not by using @mkdir(...);
(because that would simply waive all possible warnings, not just the directory already exists one), but by registering a specific error handler before doing it:
namespace com\stackoverflow;
set_error_handler(function($errno, $errm) {
if (strpos($errm,"exists") === false) throw new \Exception($errm); //or better: create your own FolderCreationException class
});
mkdir($folder);
/* possibly more mkdir instructions, which is when this becomes useful */
restore_error_handler();
$year = date("Y");
$month = date("m");
$filename = "../".$year;
$filename2 = "../".$year."/".$month;
if(file_exists($filename)){
if(file_exists($filename2)==false){
mkdir($filename2,0777);
}
}else{
mkdir($filename,0777);
}
Source: Stackoverflow.com