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<title>[44454] trunk: Permalinks: Add a `pre_wp_unique_post_slug` filter.</title>
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<dt style="float: left; width: 6em; font-weight: bold">Revision</dt> <dd><a style="font-weight: bold" href="https://core.trac.wordpress.org/changeset/44454">44454</a><script type="application/ld+json">{"@context":"http://schema.org","@type":"EmailMessage","description":"Review this Commit","action":{"@type":"ViewAction","url":"https://core.trac.wordpress.org/changeset/44454","name":"Review Commit"}}</script></dd>
<dt style="float: left; width: 6em; font-weight: bold">Author</dt> <dd>pento</dd>
<dt style="float: left; width: 6em; font-weight: bold">Date</dt> <dd>2019-01-08 03:46:58 +0000 (Tue, 08 Jan 2019)</dd>
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<pre style='padding-left: 1em; margin: 2em 0; border-left: 2px solid #ccc; line-height: 1.25; font-size: 105%; font-family: sans-serif'>Permalinks: Add a `pre_wp_unique_post_slug` filter.
Returning a non-`null` value on this fillter will cause `wp_unique_post_slug()` to return early with that value, skipping potentially expensive database queries on some sites.
Props coffee2code, javorszky, iCaleb.
Fixes <a href="https://core.trac.wordpress.org/ticket/21112">#21112</a>.</pre>
<h3>Modified Paths</h3>
<ul>
<li><a href="#trunksrcwpincludespostphp">trunk/src/wp-includes/post.php</a></li>
<li><a href="#trunktestsphpunittestspostphp">trunk/tests/phpunit/tests/post.php</a></li>
</ul>
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<h3>Diff</h3>
<a id="trunksrcwpincludespostphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-includes/post.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-includes/post.php 2019-01-08 03:41:38 UTC (rev 44453)
+++ trunk/src/wp-includes/post.php 2019-01-08 03:46:58 UTC (rev 44454)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -4117,6 +4117,26 @@
</span><span class="cx" style="display: block; padding: 0 10px"> return $slug;
</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">+ /**
+ * Filters the post slug before it is generated to be unique.
+ *
+ * Returning a non-null value will short-circuit the
+ * unique slug generation, returning the passed value instead.
+ *
+ * @since 5.1.0
+ *
+ * @param string $override_slug Short-circuit return value.
+ * @param string $slug The desired slug (post_name).
+ * @param int $post_ID Post ID.
+ * @param string $post_status The post status.
+ * @param string $post_type Post type.
+ * @param int $post_parent Post parent ID.
+ */
+ $override_slug = apply_filters( 'pre_wp_unique_post_slug', null, $slug, $post_ID, $post_status, $post_type, $post_parent );
+ if ( null !== $override_slug ) {
+ return $override_slug;
+ }
+
</ins><span class="cx" style="display: block; padding: 0 10px"> global $wpdb, $wp_rewrite;
</span><span class="cx" style="display: block; padding: 0 10px">
</span><span class="cx" style="display: block; padding: 0 10px"> $original_slug = $slug;
</span></span></pre></div>
<a id="trunktestsphpunittestspostphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/tests/phpunit/tests/post.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/tests/phpunit/tests/post.php 2019-01-08 03:41:38 UTC (rev 44453)
+++ trunk/tests/phpunit/tests/post.php 2019-01-08 03:46:58 UTC (rev 44454)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1357,4 +1357,30 @@
</span><span class="cx" style="display: block; padding: 0 10px"> $this->assertEquals( $changeset_data, json_decode( get_post( $post_id )->post_content, true ) );
</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">+ /**
+ * Test ensuring that the post_slug can be filtered with a custom value short circuiting the built in
+ * function that tries to create a unique name based on the post name.
+ *
+ * @see wp_unique_post_slug()
+ * @ticket 21112
+ */
+ function test_pre_wp_unique_post_slug_filter() {
+ add_filter( 'pre_wp_unique_post_slug', array( $this, 'filter_pre_wp_unique_post_slug' ), 10, 6 );
+
+ $post_id = $this->factory->post->create(
+ array(
+ 'title' => 'An example',
+ 'post_status' => 'publish',
+ 'post_type' => 'page',
+ )
+ );
+ $post = get_post( $post_id );
+ $this->assertEquals( 'override-slug-' . $post->post_type, $post->post_name );
+
+ remove_filter( 'pre_wp_unique_post_slug', array( $this, 'filter_pre_wp_unique_post_slug' ), 10, 6 );
+ }
+
+ function filter_pre_wp_unique_post_slug( $default, $slug, $post_ID, $post_status, $post_type, $post_parent ) {
+ return 'override-slug-' . $post_type;
+ }
</ins><span class="cx" style="display: block; padding: 0 10px"> }
</span></span></pre>
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