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The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )
apply_filters( "hook_name", "what_to_filter" )
.Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
Line | Code |
---|---|
148 | 'blogname' => $blogname_columns, |
149 | 'lastupdated' => __( 'Last Updated' ), |
150 | 'registered' => _x( 'Registered', 'site' ), |
151 | 'users' => __( 'Users' ) |
152 | ); |
153 |
|
154 | if ( has_filter( 'wpmublogsaction' ) ) |
155 | $sites_columns['plugins'] = __( 'Actions' ); |
156 |
|
157 | $sites_columns = apply_filters( 'wpmu_blogs_columns', $sites_columns ); |
158 |
|
159 | return $sites_columns; |
160 | } |
161 |
|
162 | function get_sortable_columns() { |
163 | return array( |
164 | 'blogname' => 'blogname', |
165 | 'lastupdated' => 'lastupdated', |
166 | 'registered' => 'blog_id', |