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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 |
---|---|
769 | * Filters the legacy contextual help list. |
770 | * |
771 | * @since 2.7.0 |
772 | * @deprecated 3.3.0 Use get_current_screen()->add_help_tab() or |
773 | * get_current_screen()->remove_help_tab() instead. |
774 | * |
775 | * @param array $old_compat_help Old contextual help. |
776 | * @param WP_Screen $this Current WP_Screen instance. |
777 | */ |
778 | self::$_old_compat_help = apply_filters( 'contextual_help_list', self::$_old_compat_help, $this ); |
779 |
|
780 | $old_help = isset( self::$_old_compat_help[ $this->id ] ) ? self::$_old_compat_help[ $this->id ] : ''; |
781 |
|
782 | /** |
783 | * Filters the legacy contextual help text. |
784 | * |
785 | * @since 2.7.0 |
786 | * @deprecated 3.3.0 Use get_current_screen()->add_help_tab() or |
787 | * get_current_screen()->remove_help_tab() instead. |