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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 |
|---|---|
| 821 | * Filter the legacy contextual help list. |
| 822 | * |
| 823 | * @since 2.7.0 |
| 824 | * @deprecated 3.3.0 Use get_current_screen()->add_help_tab() or |
| 825 | * get_current_screen()->remove_help_tab() instead. |
| 826 | * |
| 827 | * @param array $old_compat_help Old contextual help. |
| 828 | * @param WP_Screen $this Current WP_Screen instance. |
| 829 | */ |
| 830 | self::$_old_compat_help = apply_filters( 'contextual_help_list', self::$_old_compat_help, $this ); |
| 831 | |
| 832 | $old_help = isset( self::$_old_compat_help[ $this->id ] ) ? self::$_old_compat_help[ $this->id ] : ''; |
| 833 | |
| 834 | /** |
| 835 | * Filter the legacy contextual help text. |
| 836 | * |
| 837 | * @since 2.7.0 |
| 838 | * @deprecated 3.3.0 Use get_current_screen()->add_help_tab() or |
| 839 | * get_current_screen()->remove_help_tab() instead. |