If you’re not thrilled with the provided options for a default avatar, you can use this to quickly add your own image to the list.
add_filter( 'avatar_defaults', 'addavatar' );
function addavatar ( $avatar_defaults ) {
$avatar_defaults[ 'http://placekitten.com/512/512' ] = 'Placekitten';
return $avatar_defaults;
}
Need to declutter the profile options by removing the various IM fields. It’s easy
add_filter('user_contactmethods', 'remove_im_options', 10, 2);
function remove_im_options( $user_contactmethods, $user ) {
unset($user_contactmethods['aim']);
unset($user_contactmethods['yim']);
unset($user_contactmethods['jabber']);
//$user_contactmethods = array();
return $user_contactmethods;
}
I’m working on a plugin right now where I’m having to hide or limit a lot of features depending on the current user’s capabilities. Among those limitations is media uploading and editing access. I’m using this snippet to hide the Media Library tab from the Add an Image pop-up on the edit post page.
add_filter('media_upload_tabs','no_library_tab');
function no_library_tab($tabs) {
if (!current_user_can('promote_users')) {
unset($tabs['library']);
}
return $tabs;
}
If you need to hand over the reins to a client, but want to make sure certain options stay unchanged, you can add this code:
add_filter( 'pre_update_option_admin_email', 'prevent_option_change', 10, 2 );
function prevent_option_change( $newvalue, $oldvalue ) {
return $oldvalue;
}
In this case, I’m preserving ‘admin_email’ – just change that part of the filter hook to preserve another option.
I don’t have a good example of why you might want or need this, but nevertheless, if you should want to add additional text to the Widgets admin, it’s pretty darn easy:
add_action( 'widgets_admin_page', 'widgets_admin_info' );
function widgets_admin_info() {
?>
<p style="clear:both;">Hello there!!</p>
<?php
}
Maybe it’s just me, but sometimes I’d link to grab an image’s file URL from the Media Library, but I can’t do it easily. This little snippet will add a link to the ‘row actions’ (“Edit | Delete Permanently | View”) for the File URL (as opposed the the attachment URL you’ll get with the ‘view’ link)
add_filter ('media_row_actions','add_direct_link', 10, 3 );
function add_direct_link( $actions, $post, $detached ) {
$actions['file_url'] = '<a href="' . wp_get_attachment_url($post->ID) . '">Actual File</a>';
return $actions;
}
If you need quick access to the image dimensions from the Media Library, this will add a ‘Dimensions’ column
add_filter( 'manage_media_columns', 'add_media_columns');
function add_media_columns( $columns ) {
$columns['dimensions'] = 'Dimensions';
return $columns;
}
add_action( 'manage_media_custom_column', 'fill_media_columns', 10, 2 );
function fill_media_columns( $column_name, $id ) {
switch ( $column_name ) {
case 'dimensions' :
$meta = wp_get_attachment_metadata( $id );
if ( isset( $meta['width'] ) ) {
echo $meta['width'].' x '.$meta['height'];
}
break;
}
}Don’t forget to prefix these to avoid clashes with other code!
Need to add a little something to the date column on the posts/pages page? Maybe just make the date a little bolder. It’s easy
add_filter( 'post_date_column_time', 'customize_date_column', 10, 4 );
function customize_date_column( $h_time, $post, $column_name, $mode ) {
//$post = post object
//$column_name = date
//$mode = 'list' or 'excerpt'
return ''.$h_time.'';
}
Depending on your role and capabilities, you may see something like this on your posts/pages screen “mine () | all () | published ()”
Those items are editable.
In my case, I wanted ‘authors’ to only have access to the ‘mine’ list, since ‘mine’ is default, I wanted to remove the views list entirely, but only for non-administrators.
add_filter('views_edit-post', 'only_show_mine');
function only_show_mine( $views ) {
if (!current_user_can('promote_users')) {
$views = array(); //remove all options
//unset($views['all']);
//unset($views['publish']);
}
return $views;
}
If you’re one of those that don’t love the admin bar, here’s how to disable it, as well as the option to show/hide it.
add_filter('show_admin_bar', '__return_false');
add_action( 'admin_print_scripts-profile.php', 'hide_admin_bar_prefs' );
function hide_admin_bar_prefs() {
?><style type="text/css">.show-admin-bar {display:none;}</style><?php
}