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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. |