WordPress 2.5.0 Hooks, Functions, Classes and Methods
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wp_edit_attachments_query()

Executes a query for attachments. An array of WP_Query arguments can be passed in, which will override the arguments set by this function.

WP_Filesystem()

Initializes and connects the WordPress Filesystem Abstraction classes.

wp_generator()

Displays the XHTML generator that is generated on the wp_head hook.