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<title>[31019] trunk/src/wp-admin/includes/template.php: `WP_List_Table`'s constructor registers an `'admin_footer'` callback when AJAX is enabled.</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/31019">31019</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/31019","name":"Review Commit"}}</script></dd>
<dt style="float: left; width: 6em; font-weight: bold">Author</dt> <dd>wonderboymusic</dd>
<dt style="float: left; width: 6em; font-weight: bold">Date</dt> <dd>2015-01-01 19:54:53 +0000 (Thu, 01 Jan 2015)</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'>`WP_List_Table`'s constructor registers an `'admin_footer'` callback when AJAX is enabled. As such, if you create multiple instances of the class, you get multiple JS blobs on the page when the callbacks fire. Extra instances get made when `wp_comment_reply()` invokes the class constructor without checking for the existing instance via the `$wp_list_table` global.
We shall check the `$wp_list_table` global in `wp_comment_reply()`.
Props sorich87.
Fixes <a href="https://core.trac.wordpress.org/ticket/17413">#17413</a>.</pre>
<h3>Modified Paths</h3>
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<li><a href="#trunksrcwpadminincludestemplatephp">trunk/src/wp-admin/includes/template.php</a></li>
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<h3>Diff</h3>
<a id="trunksrcwpadminincludestemplatephp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-admin/includes/template.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-admin/includes/template.php 2015-01-01 19:20:44 UTC (rev 31018)
+++ trunk/src/wp-admin/includes/template.php 2015-01-01 19:54:53 UTC (rev 31019)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -412,7 +412,7 @@
</span><span class="cx" style="display: block; padding: 0 10px"> * @param bool $table_row
</span><span class="cx" style="display: block; padding: 0 10px"> */
</span><span class="cx" style="display: block; padding: 0 10px"> function wp_comment_reply($position = '1', $checkbox = false, $mode = 'single', $table_row = true) {
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ global $wp_list_table;
</ins><span class="cx" style="display: block; padding: 0 10px"> /**
</span><span class="cx" style="display: block; padding: 0 10px"> * Filter the in-line comment reply-to form output in the Comments
</span><span class="cx" style="display: block; padding: 0 10px"> * list table.
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -435,10 +435,12 @@
</span><span class="cx" style="display: block; padding: 0 10px"> return;
</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">- if ( $mode == 'single' ) {
- $wp_list_table = _get_list_table('WP_Post_Comments_List_Table');
- } else {
- $wp_list_table = _get_list_table('WP_Comments_List_Table');
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ if ( ! $wp_list_table ) {
+ if ( $mode == 'single' ) {
+ $wp_list_table = _get_list_table('WP_Post_Comments_List_Table');
+ } else {
+ $wp_list_table = _get_list_table('WP_Comments_List_Table');
+ }
</ins><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"> ?>
</span></span></pre>
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