WordPress 3.0.0 Hooks, Functions, Classes and Methods
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wp_reset_postdata()

After looping through a separate query, this function restores the $post global to the current post in the main query.

wp_set_wpdb_vars()

Set the database table prefix and the format specifiers for database table columns.

wp_shake_js()

Outputs the JavaScript to handle the form shaking on the login page.