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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 |
---|---|
765 |
|
766 | // Call old contextual_help_list filter. |
767 | self::$_old_compat_help = apply_filters( 'contextual_help_list', self::$_old_compat_help, $this ); |
768 |
|
769 | $old_help = isset( self::$_old_compat_help[ $this->id ] ) ? self::$_old_compat_help[ $this->id ] : ''; |
770 | $old_help = apply_filters( 'contextual_help', $old_help, $this->id, $this ); |
771 |
|
772 | // Default help only if there is no old-style block of text and no new-style help tabs. |
773 | if ( empty( $old_help ) && ! $this->get_help_tabs() ) { |
774 | $default_help = apply_filters( 'default_contextual_help', '' ); |
775 | if ( $default_help ) |
776 | $old_help = '<p>' . $default_help . '</p>'; |
777 | } |
778 |
|
779 | if ( $old_help ) { |
780 | $this->add_help_tab( array( |
781 | 'id' => 'old-contextual-help', |
782 | 'title' => __('Overview'), |
783 | 'content' => $old_help, |