Wordpress create subfolder in uploads directory from plugin

Question

I am writing a plugin that requires that I create a subfolder within the uploads directory.

Here's what I have tried thus far:

$uploads_dir = trailingslashit( wp_upload_dir( dirname( __FILE__) ) ) . '/evaluation-uploads';
wp_mkdir_p( $uploads_dir ); 

However when I check 'wp-content/uploads/' the subfolder has not been created.

Answer 1

Just use this modified version:

$uploads_dir = trailingslashit( wp_upload_dir()['basedir'] ) . 'evaluation-uploads';
wp_mkdir_p( $uploads_dir );

(Will only work on PHP 5.4+)

Corrections made:

• No need to pass dirname( __FILE__) as parameter to wp_upload_dir
• Also wp_upload_dir returns an array, so you need to access the path you need
• trailingslashit will already remove and append a new trailing slash, so removed it from your string

Also check file/dir user-permissions to ensure PHP can actually create a dir there.