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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 |
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753 | * Filters the legacy contextual help list. |
754 | * |
755 | * @since 2.7.0 |
756 | * @deprecated 3.3.0 Use get_current_screen()->add_help_tab() or |
757 | * get_current_screen()->remove_help_tab() instead. |
758 | * |
759 | * @param array $old_compat_help Old contextual help. |
760 | * @param WP_Screen $this Current WP_Screen instance. |
761 | */ |
762 | self::$_old_compat_help = apply_filters( 'contextual_help_list', self::$_old_compat_help, $this ); |
763 |
|
764 | $old_help = isset( self::$_old_compat_help[ $this->id ] ) ? self::$_old_compat_help[ $this->id ] : ''; |
765 |
|
766 | /** |
767 | * Filters the legacy contextual help text. |
768 | * |
769 | * @since 2.7.0 |
770 | * @deprecated 3.3.0 Use get_current_screen()->add_help_tab() or |
771 | * get_current_screen()->remove_help_tab() instead. |