You won’t be calling stuff directly from the functions.php file by URL reference. The functions.php is loaded in with the WordPress theme and it makes functions available to you from within the theme template files. Most of your code can be ported directly into the functions.php but you will have to wrap some sort of … Read more
$wp_filesystem is a global variable containing the instance of the (auto-)configured filesystem object after the filesystem “factory” has been run. To run the factory “over” the global variable (so to set it), just call the WP_Filesystem() function which is, guess what, undocumented in codex. At least the docblock contains some information and you can read … Read more
The function lives in wp-admin/includes/export.php and is only included on the export admin page (see source). If you want to use it on other pages, you’ll have to include it manually: require_once( ABSPATH . ‘wp-admin/includes/export.php’ );
See Ben Word – How to Hide WordPress Summary: In the Roots Theme we’re taking several steps to help make it not so obvious that you’re using WordPress: Cleaning up the output of wp_head and removing the generator from RSS feeds Hiding /wp-content/ by rewriting static theme assets (CSS, JS, and images), rewriting the plugins … Read more
Yeahh! I finally found a solution! The trick was to set all files and folders their ownership and group to the apache user. Make sure you’ve an directory for temporary storage and you need to have the ../wp-content/upgrade/ directory as well. Than at your wp-config.php this is the only thing I’m not aware about of … Read more
Ideally, you install php-suexec, so that the php script runs as the file’s owner. This allows the direct method to be used without requiring any permission changes.
What follows is kind of complicated. You can probably just use fopen or file_get_contents without any issues. There’s the filesystem api. Which deals with determining ownership of a file and returning the correct way of accessing it — most of the time that just means normal PHP functions (or the direct filesystem class). Otto has … Read more
No, there is not a more convenient way. The thing is, your first example is insecure on the most common hosting systems because the directory will be “owned” by whatever user the webserver itself is running as. Thus, anybody else able to execute code on that same webserver will be able to access it, write … Read more
Use wp_delete_attachment( $post_id ) if you have used wp_insert_attachment() before. $post_id is the attachment ID. If you haven’t used wp_insert_attachment() a simple … unlink( $upload[‘file’] ); … will do it.
There isn’t an easy way to do this at this time. Check out this question’s answers for some potential work arounds.