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<title>[BuddyPress][12500] branches/5.0: Compat classes to handle `Walker_Nav_Menu::walk()` changes in WP 5.3</title>
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<dt style="float: left; width: 6em; font-weight: bold">Revision</dt> <dd><a style="font-weight: bold" href="http://buddypress.trac.wordpress.org/changeset/12500">12500</a><script type="application/ld+json">{"@context":"http://schema.org","@type":"EmailMessage","description":"Review this Commit","action":{"@type":"ViewAction","url":"http://buddypress.trac.wordpress.org/changeset/12500","name":"Review Commit"}}</script></dd>
<dt style="float: left; width: 6em; font-weight: bold">Author</dt> <dd>imath</dd>
<dt style="float: left; width: 6em; font-weight: bold">Date</dt> <dd>2019-11-29 06:06:30 +0000 (Fri, 29 Nov 2019)</dd>
</dl>

<pre style='padding-left: 1em; margin: 2em 0; border-left: 2px solid #ccc; line-height: 1.25; font-size: 105%; font-family: sans-serif'>Compat classes to handle `Walker_Nav_Menu::walk()` changes in WP 5.3

WordPress 5.3 modified the `Walker_Nav_Menu::walk()` signature adding a third parameter to the method that is using the spread operator. johnjamesjacoby quickly fixed the issue in <a href="http://buddypress.trac.wordpress.org/changeset/12497">[12497]</a> when PHP >=5.6.

As our current PHP required version is 5.3, we need to provide a temporary compatibility mechanism to make sure our `BP_Walker_Nav_Menu` will not generate errors when the PHP version is lower than 5.6 before raising the PHP required version in our next major release.

props timothybjacobs, boonebgorges, imath

Fixes <a href="http://buddypress.trac.wordpress.org/ticket/8163">#8163</a> (5.0 branch)</pre>

<h3>Modified Paths</h3>
<ul>
<li><a href="#branches50Gruntfilejs">branches/5.0/Gruntfile.js</a></li>
<li><a href="#branches50srcbpcoreclassesclassbpwalkernavmenuphp">branches/5.0/src/bp-core/classes/class-bp-walker-nav-menu.php</a></li>
</ul>

<h3>Added Paths</h3>
<ul>
<li>branches/5.0/src/bp-core/compat/</li>
<li>branches/5.0/src/bp-core/compat/php53/</li>
<li><a href="#branches50srcbpcorecompatphp53classbpcompatwalkernavmenuphp">branches/5.0/src/bp-core/compat/php53/class-bp-compat-walker-nav-menu.php</a></li>
<li>branches/5.0/src/bp-core/compat/php56/</li>
<li><a href="#branches50srcbpcorecompatphp56classbpcompatwalkernavmenuphp">branches/5.0/src/bp-core/compat/php56/class-bp-compat-walker-nav-menu.php</a></li>
<li><a href="#branches50testsphpunittestcasescoreclassbpwalkernavmenuphp">branches/5.0/tests/phpunit/testcases/core/class-bp-walker-nav-menu.php</a></li>
</ul>

</div>
<div id="patch">
<h3>Diff</h3>
<a id="branches50Gruntfilejs"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: branches/5.0/Gruntfile.js</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- branches/5.0/Gruntfile.js 2019-11-29 04:55:19 UTC (rev 12499)
+++ branches/5.0/Gruntfile.js   2019-11-29 06:06:30 UTC (rev 12500)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -269,7 +269,7 @@
</span><span class="cx" style="display: block; padding: 0 10px">                        }
</span><span class="cx" style="display: block; padding: 0 10px">                },
</span><span class="cx" style="display: block; padding: 0 10px">                phplint: {
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        good: ['src/**/*.php'].concat( BP_EXCLUDED_MISC )
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 good: ['src/**/*.php', '!src/bp-core/compat/php56/*.php'].concat( BP_EXCLUDED_MISC )
</ins><span class="cx" style="display: block; padding: 0 10px">                 },
</span><span class="cx" style="display: block; padding: 0 10px">                postcss: {
</span><span class="cx" style="display: block; padding: 0 10px">                        options: {
</span></span></pre></div>
<a id="branches50srcbpcoreclassesclassbpwalkernavmenuphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: branches/5.0/src/bp-core/classes/class-bp-walker-nav-menu.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- branches/5.0/src/bp-core/classes/class-bp-walker-nav-menu.php     2019-11-29 04:55:19 UTC (rev 12499)
+++ branches/5.0/src/bp-core/classes/class-bp-walker-nav-menu.php       2019-11-29 06:06:30 UTC (rev 12500)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -11,12 +11,12 @@
</span><span class="cx" style="display: block; padding: 0 10px"> defined( 'ABSPATH' ) || exit;
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px"> /**
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- * Create HTML list of BP nav items.
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ * Compatibility Class to make BP_Walker_Nav_Menu::walk() compatible
+ * from PHP 5.3 to 5.6 and up.
</ins><span class="cx" style="display: block; padding: 0 10px">  *
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- * @since 1.7.0
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ * @since 5.1.0
</ins><span class="cx" style="display: block; padding: 0 10px">  */
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-class BP_Walker_Nav_Menu extends Walker_Nav_Menu {
-
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+class BP_Walker_Nav_Menu_Compat extends Walker_Nav_Menu {
</ins><span class="cx" style="display: block; padding: 0 10px">         /**
</span><span class="cx" style="display: block; padding: 0 10px">         * Description of fields indexes for building markup.
</span><span class="cx" style="display: block; padding: 0 10px">         *
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -47,15 +47,16 @@
</span><span class="cx" style="display: block; padding: 0 10px">         * those have ID/post_parent.
</span><span class="cx" style="display: block; padding: 0 10px">         *
</span><span class="cx" style="display: block; padding: 0 10px">         * @since 1.7.0
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         * @since 5.1.0 Method was renamed from `walk` to `do_walk` to ensure PHP 5.3 compatibility
</ins><span class="cx" style="display: block; padding: 0 10px">          *
</span><span class="cx" style="display: block; padding: 0 10px">         * @see Walker::walk()
</span><span class="cx" style="display: block; padding: 0 10px">         *
</span><span class="cx" style="display: block; padding: 0 10px">         * @param array $elements  See {@link Walker::walk()}.
</span><span class="cx" style="display: block; padding: 0 10px">         * @param int   $max_depth See {@link Walker::walk()}.
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         * @param array $args      Optional additional arguments.
</ins><span class="cx" style="display: block; padding: 0 10px">          * @return string See {@link Walker::walk()}.
</span><span class="cx" style="display: block; padding: 0 10px">         */
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-        public function walk( $elements, $max_depth ) {
-               $args   = array_slice( func_get_args(), 2 );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ public function do_walk( $elements, $max_depth, $args = array() ) {
</ins><span class="cx" style="display: block; padding: 0 10px">                 $output = '';
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                if ( $max_depth < -1 ) // Invalid parameter.
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -211,3 +212,9 @@
</span><span class="cx" style="display: block; padding: 0 10px">                $output .= apply_filters( 'bp_walker_nav_menu_start_el', $item_output, $item, $depth, $args );
</span><span class="cx" style="display: block; padding: 0 10px">        }
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+
+if ( PHP_VERSION_ID >= 50600 ) {
+       require_once dirname( __DIR__ ) . '/compat/php56/class-bp-compat-walker-nav-menu.php';
+} else {
+       require_once dirname( __DIR__ ) . '/compat/php53/class-bp-compat-walker-nav-menu.php';
+}
</ins></span></pre></div>
<a id="branches50srcbpcorecompatphp53classbpcompatwalkernavmenuphp"></a>
<div class="addfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Added: branches/5.0/src/bp-core/compat/php53/class-bp-compat-walker-nav-menu.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- branches/5.0/src/bp-core/compat/php53/class-bp-compat-walker-nav-menu.php                         (rev 0)
+++ branches/5.0/src/bp-core/compat/php53/class-bp-compat-walker-nav-menu.php   2019-11-29 06:06:30 UTC (rev 12500)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -0,0 +1,32 @@
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+<?php
+/**
+ * Walker_Nav_Menu Compat for PHP 5.3 and UP.
+ *
+ * @package BuddyPress
+ * @subpackage Core
+ * @since 5.1.0
+ */
+
+ // Exit if accessed directly.
+defined( 'ABSPATH' ) || exit;
+
+/**
+ * Create HTML list of BP nav items.
+ *
+ * @since 1.7.0
+ */
+class BP_Walker_Nav_Menu extends BP_Walker_Nav_Menu_Compat {
+       /**
+        * Compat method to extend Walker_Nav_Menu::walk() in PHP < 5.6.
+        *
+        * @since 5.1.0
+        *
+        * @param array $elements  See {@link Walker::walk()}.
+        * @param int   $max_depth See {@link Walker::walk()}.
+        */
+       public function walk( $elements, $max_depth ) {
+               $args = array_slice( func_get_args(), 2 );
+
+               return $this->do_walk( $elements, $max_depth, $args );
+       }
+}
</ins><span class="cx" style="display: block; padding: 0 10px">Property changes on: branches/5.0/src/bp-core/compat/php53/class-bp-compat-walker-nav-menu.php
</span><span class="cx" style="display: block; padding: 0 10px">___________________________________________________________________
</span></span></pre></div>
<a id="svneolstyle"></a>
<div class="addfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Added: svn:eol-style</h4></div>
<ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+native
</ins><span class="cx" style="display: block; padding: 0 10px">\ No newline at end of property
</span><a id="branches50srcbpcorecompatphp56classbpcompatwalkernavmenuphp"></a>
<div class="addfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Added: branches/5.0/src/bp-core/compat/php56/class-bp-compat-walker-nav-menu.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- branches/5.0/src/bp-core/compat/php56/class-bp-compat-walker-nav-menu.php                         (rev 0)
+++ branches/5.0/src/bp-core/compat/php56/class-bp-compat-walker-nav-menu.php   2019-11-29 06:06:30 UTC (rev 12500)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -0,0 +1,31 @@
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+<?php
+/**
+ * Walker_Nav_Menu Compat for PHP 5.6 and UP.
+ *
+ * @package BuddyPress
+ * @subpackage Core
+ * @since 5.1.0
+ */
+
+ // Exit if accessed directly.
+defined( 'ABSPATH' ) || exit;
+
+/**
+ * Create HTML list of BP nav items.
+ *
+ * @since 1.7.0
+ */
+class BP_Walker_Nav_Menu extends BP_Walker_Nav_Menu_Compat {
+       /**
+        * Compat method to extend Walker_Nav_Menu::walk() in PHP > 5.6.
+        *
+        * @since 5.1.0
+        *
+        * @param array $elements  See {@link Walker::walk()}.
+        * @param int   $max_depth See {@link Walker::walk()}.
+        * @param mixed ...$args   See {@link Walker::walk()}.
+        */
+       public function walk( $elements, $max_depth, ...$args ) { // phpcs:ignore PHPCompatibility.LanguageConstructs.NewLanguageConstructs.t_ellipsisFound
+               return $this->do_walk( $elements, $max_depth, $args );
+       }
+}
</ins><span class="cx" style="display: block; padding: 0 10px">Property changes on: branches/5.0/src/bp-core/compat/php56/class-bp-compat-walker-nav-menu.php
</span><span class="cx" style="display: block; padding: 0 10px">___________________________________________________________________
</span></span></pre></div>
<a id="svneolstyle"></a>
<div class="addfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Added: svn:eol-style</h4></div>
<ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+native
</ins><span class="cx" style="display: block; padding: 0 10px">\ No newline at end of property
</span><a id="branches50testsphpunittestcasescoreclassbpwalkernavmenuphp"></a>
<div class="addfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Added: branches/5.0/tests/phpunit/testcases/core/class-bp-walker-nav-menu.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- branches/5.0/tests/phpunit/testcases/core/class-bp-walker-nav-menu.php                            (rev 0)
+++ branches/5.0/tests/phpunit/testcases/core/class-bp-walker-nav-menu.php      2019-11-29 06:06:30 UTC (rev 12500)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -0,0 +1,50 @@
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+<?php
+/**
+ * @group core
+ * @group BP_Walker_Nav_Menu
+ */
+class BP_Tests_Walker_Nav_Menu extends BP_UnitTestCase {
+       protected $reset_user_id;
+       protected $user_id;
+
+       public function setUp() {
+               parent::setUp();
+
+               $this->reset_user_id = get_current_user_id();
+
+               $this->user_id = self::factory()->user->create();
+               $this->set_current_user( $this->user_id );
+       }
+
+       public function tearDown() {
+               parent::tearDown();
+               $this->set_current_user( $this->reset_user_id );
+       }
+
+       public function test_walk_method() {
+               $expected = array( 'activity-class', 'xprofile-class' );
+               $items    = array(
+                       (object) array(
+                               'component_id' => 'activity',
+                               'name'         => 'Activity',
+                               'slug'         => 'activity',
+                               'link'         => trailingslashit( bp_loggedin_user_domain() . bp_get_activity_slug() ),
+                               'css_id'       => 'activity',
+                               'class'        => array( $expected[0] ),
+                       ),
+                       (object) array(
+                               'component_id' => 'xprofile',
+                               'name'         => 'Profile',
+                               'slug'         => 'profile',
+                               'link'         => trailingslashit( bp_loggedin_user_domain() . bp_get_profile_slug() ),
+                               'css_id'       => 'xprofile',
+                               'class'        => array( $expected[1] ),
+                       ),
+               );
+               $args = (object) array( 'before' => '', 'link_before' => '', 'after' => '', 'link_after' => '' );
+               $walker = new BP_Walker_Nav_Menu();
+               $output = $walker->walk( $items, -1, $args );
+               preg_match_all( '/class=["\']?([^"\']*)["\' ]/is', $output, $classes );
+               $this->assertSame( $classes[1], $expected );
+       }
+}
</ins><span class="cx" style="display: block; padding: 0 10px">Property changes on: branches/5.0/tests/phpunit/testcases/core/class-bp-walker-nav-menu.php
</span><span class="cx" style="display: block; padding: 0 10px">___________________________________________________________________
</span></span></pre></div>
<a id="svneolstyle"></a>
<div class="addfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Added: svn:eol-style</h4></div>
<ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+native
</ins><span class="cx" style="display: block; padding: 0 10px">\ No newline at end of property
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