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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 |
|---|---|
| 128 | // define the columns to display, the syntax is 'internal name' => 'display name' |
| 129 | $posts_columns = array( |
| 130 | 'id' => '<div style="text-align: center">' . __('ID') . '</div>', |
| 131 | 'date' => __('When'), |
| 132 | 'title' => __('Title'), |
| 133 | 'categories' => __('Categories'), |
| 134 | 'comments' => '<div style="text-align: center">' . __('Comments') . '</div>', |
| 135 | 'author' => __('Author') |
| 136 | ); |
| 137 | $posts_columns = apply_filters('manage_posts_columns', $posts_columns); |
| 138 | |
| 139 | // you can not edit these at the moment |
| 140 | $posts_columns['control_view'] = ''; |
| 141 | $posts_columns['control_edit'] = ''; |
| 142 | $posts_columns['control_delete'] = ''; |
| 143 | |
| 144 | ?> |
| 145 | |
| 146 | <table class="widefat"> |