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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 |
|---|---|
| 792 | * Filter the legacy contextual help list. |
| 793 | * |
| 794 | * @since 2.7.0 |
| 795 | * @deprecated 3.3.0 Use get_current_screen()->add_help_tab() or |
| 796 | * get_current_screen()->remove_help_tab() instead. |
| 797 | * |
| 798 | * @param array $old_compat_help Old contextual help. |
| 799 | * @param WP_Screen $this Current WP_Screen instance. |
| 800 | */ |
| 801 | self::$_old_compat_help = apply_filters( 'contextual_help_list', self::$_old_compat_help, $this ); |
| 802 | |
| 803 | $old_help = isset( self::$_old_compat_help[ $this->id ] ) ? self::$_old_compat_help[ $this->id ] : ''; |
| 804 | |
| 805 | /** |
| 806 | * Filter the legacy contextual help text. |
| 807 | * |
| 808 | * @since 2.7.0 |
| 809 | * @deprecated 3.3.0 Use get_current_screen()->add_help_tab() or |
| 810 | * get_current_screen()->remove_help_tab() instead. |