Cleanup WordPress Header

Posted by tung on August 3, 2010 in Google Reader | Comments Off

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Cleanup WordPress Header

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你知道這些狗屎header消耗多少資源嗎?恩~當你超過上萬篇文章就有感覺了~

WordPress implements new standard features in the head of the theme since version 2.5, that are always on the hook wp_head. Even in WordPress 2.8 new functions were added. If you don’t need them you can easily disable them by using the function remove_action.

Function remove_action

remove_action( $tag, $function_to_add, $priority, $accepted_args );

This function removes a function attached to a specified action hook. This method can be used to remove default functions attached to a specific action hook and possibly replace them with a substitute.

Important: To remove a hook, the $function_to_remove and $priority arguments must match when the hook was added. This goes for both filters and actions. No warning will be given on removal failure.
via: WP Codexy

The following syntax shows an excerpt, only a part of the output you can have in your theme. They result from the standard functions, which are loaded in the head of the theme. Visible, if you search in the file wp-includes/default-filters.php for the Hook wp_head. Not all filters should be deactivated, because in most cases they are useful. But WordPress is not only as classical blog in use and therefore some functions are not necessary.

< link rel="alternate" type="application/rss+xml" title="WP Engineer RSS Feed" href="http://wpengineer.com/feed/" />
< link rel="alternate" type="application/atom+xml" title="WP Engineer Atom Feed" href="http://wpengineer.com/feed/atom/" />
< link rel="pingback" href="http://wpengineer.com/blog/xmlrpc.php" />
< link rel="EditURI" type="application/rsd+xml" title="RSD" href="http://wpengineer.com/xmlrpc.php?rsd" />
< link rel='index' title='WP Engineer' href='http://wpengineer.com' />
< link rel='start' title='Use WordPress 2.7 Offline' href='http://wpengineer.com/use-wordpress-27-offline/' />
< link rel='prev' title='Recents Drafts All Authors' href='http://wpengineer.com/recents-drafts-all-authors/' />

This is an example, not a recommendation where some functions are deactivated. Check your header and turn off what you don’t need. Less markup and better loading time.

remove_action( 'wp_head', 'feed_links_extra', 3 ); // Display the links to the extra feeds such as category feeds
remove_action( 'wp_head', 'feed_links', 2 ); // Display the links to the general feeds: Post and Comment Feed
remove_action( 'wp_head', 'rsd_link' ); // Display the link to the Really Simple Discovery service endpoint, EditURI link
remove_action( 'wp_head', 'wlwmanifest_link' ); // Display the link to the Windows Live Writer manifest file.
remove_action( 'wp_head', 'index_rel_link' ); // index link
remove_action( 'wp_head', 'parent_post_rel_link', 10, 0 ); // prev link
remove_action( 'wp_head', 'start_post_rel_link', 10, 0 ); // start link
remove_action( 'wp_head', 'adjacent_posts_rel_link', 10, 0 ); // Display relational links for the posts adjacent to the current post.
remove_action( 'wp_head', 'wp_generator' ); // Display the XHTML generator that is generated on the wp_head hook, WP version

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