[wp-trac] [WordPress Trac] #46991: Stop propagation on actions or filter

[WordPress Trac]

#46991: Stop propagation on actions or filter
-----------------------------+------------------------------
 Reporter:  screamingdev     |       Owner:  (none)
     Type:  feature request  |      Status:  new
 Priority:  low              |   Milestone:  Awaiting Review
Component:  Plugins          |     Version:
 Severity:  normal           |  Resolution:
 Keywords:  2nd-opinion      |     Focuses:
-----------------------------+------------------------------

Comment (by screamingdev):

 Hint @johnbillion :

 * This is like "Oh, the filter 'the_content' shall not continue with this
 kind of text".
 * Comparable to `Event.stopPropagation()` from JavaScript

 This is a possible solution directly in `\WP_Hook`:

 {{{#!php
 <?php

                 do {
                         $this->current_priority[ $nesting_level ] =
 $priority = current( $this->iterations[ $nesting_level ] );

                         foreach ( $this->callbacks[ $priority ] as $the_ )
 {
                                 if( ! $this->doing_action ) {
                                         $args[ 0 ] = $value;
                                 }

                                 // Avoid the array_slice if possible.
                                 if ( $the_['accepted_args'] == 0 ) {
                                         $value = call_user_func_array(
 $the_['function'], array() );
                                 } elseif ( $the_['accepted_args'] >=
 $num_args ) {
                                         $value = call_user_func_array(
 $the_['function'], $args );
                                 } else {
                                         $value = call_user_func_array(
 $the_['function'], array_slice( $args, 0, (int)$the_['accepted_args'] ) );
                                 }
                         }

                         if ( $value instanceof \WP_Hook_Stop ) {
                                 $value = $value->get_value();
                                 break;
                         }

                 } while ( false !== next( $this->iterations[
 $nesting_level ] ) );
 }}}

 {{{#!php
 <?php

 class WP_Hook_Stop {
         __construct( $value = '' );
         get_value();
 }
 }}}

 This does not break anything and allows some dynamic in the WP_Hook queue.
 There is nothing wrong with early termination of things when the solution
 is alrady known.

-- 
Ticket URL: <https://core.trac.wordpress.org/ticket/46991#comment:4>
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