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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 |
|---|---|
| 904 | 'email' => __('E-mail'), |
| 905 | 'role' => __('Role'), |
| 906 | 'posts' => __('Posts') |
| 907 | ); |
| 908 | break; |
| 909 | default : |
| 910 | $_wp_column_headers[$page] = array(); |
| 911 | } |
| 912 | |
| 913 | $_wp_column_headers[$page] = apply_filters('manage_' . $page . '_columns', $_wp_column_headers[$page]); |
| 914 | return $_wp_column_headers[$page]; |
| 915 | } |
| 916 | |
| 917 | /** |
| 918 | * {@internal Missing Short Description}} |
| 919 | * |
| 920 | * @since unknown |
| 921 | * |
| 922 | * @param unknown_type $type |