I have been following a tutorial on readdir(), is_dir() etc involved in setting up a small image gallery based on folders and files on my FTP. I was wondering what the $directorys[] = $file; part does specifically?
while( $file= readdir( $dir_handle ) )
{
if( is_dir( $file ) ){
$directorys[] = $file;
}else{
$files[] = $file;
}
}
$directory is an array.
The code
$directory[] = $file
adds $file to the end of $directory array. This is the same as
array_push($directory, $file).
More info at array_push at phpdocs
$file will contain the name of the item that was scanned. In this case, the use of is_dir($file) allows you to check that $file in the current directory is a directory or not.
Then, using the standard array append operator [], the $file name or directory name is added to a $files/$directorys array...
It adds the directory to the directory array :)
if( is_dir( $file ) ){
$directorys[] = $file; // current item is a directory so add it to the list of directories
}else{
$files[] = $file; // current item is a file so add it to the list of files
}
However if you use PHP 5 I really suggest using a DirectoryIterator.
BTW naming that $file is really bad, since it isn't always a file.
It pushes an item to the array, instead of array_push, it would only push one item to the array.
Using array_push and $array[] = $item works the same, but it's not ideal to use array_push as it's suitable for pushing multiple items in the array.
Example:
Array (
)
After doing this $array[] = 'This works!'; or array_push($array, 'This works!') it will appear as this:
Array (
[0] => This works!
)
Also you can push arrays into an array, like so:
$array[] = array('item', 'item2');
Array (
[0] => Array (
[0] => item
[1] => item2
)
)
It creates a new array element at the end of the array and assigns a value to it.
