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<title>[31699] trunk: Improved customizability for the Submit button in `comment_form()`.</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/31699">31699</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/31699","name":"Review Commit"}}</script></dd>
<dt style="float: left; width: 6em; font-weight: bold">Author</dt> <dd>boonebgorges</dd>
<dt style="float: left; width: 6em; font-weight: bold">Date</dt> <dd>2015-03-10 19:07:31 +0000 (Tue, 10 Mar 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'>Improved customizability for the Submit button in `comment_form()`.

The new 'submit_button' and 'submit_field' parameters for `comment_form()`
allow developers to modify the markup of the submit button and its wrapper.
These params are accompanied by targeted 'comment_form_submit_button' and
'comment_form_submit_field' filters on the concatenated markup.

Props coffee2code, morpheu5, DrewAPicture, boonebgorges.
Fixes <a href="https://core.trac.wordpress.org/ticket/15015">#15015</a>.</pre>

<h3>Modified Paths</h3>
<ul>
<li><a href="#trunksrcwpincludescommenttemplatephp">trunk/src/wp-includes/comment-template.php</a></li>
</ul>

<h3>Added Paths</h3>
<ul>
<li><a href="#trunktestsphpunittestscommentcommentFormphp">trunk/tests/phpunit/tests/comment/commentForm.php</a></li>
</ul>

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<h3>Diff</h3>
<a id="trunksrcwpincludescommenttemplatephp"></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/comment-template.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-includes/comment-template.php        2015-03-10 18:01:42 UTC (rev 31698)
+++ trunk/src/wp-includes/comment-template.php  2015-03-10 19:07:31 UTC (rev 31699)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -2153,6 +2153,7 @@
</span><span class="cx" style="display: block; padding: 0 10px">  * in the array of fields.
</span><span class="cx" style="display: block; padding: 0 10px">  *
</span><span class="cx" style="display: block; padding: 0 10px">  * @since 3.0.0
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ * @since 4.2.0 Introduced 'submit_button' and 'submit_fields' arguments.
</ins><span class="cx" style="display: block; padding: 0 10px">  *
</span><span class="cx" style="display: block; padding: 0 10px">  * @param array       $args {
</span><span class="cx" style="display: block; padding: 0 10px">  *     Optional. Default arguments and form fields to override.
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -2180,6 +2181,11 @@
</span><span class="cx" style="display: block; padding: 0 10px">  *                                        where %s is the author of the comment being replied to.
</span><span class="cx" style="display: block; padding: 0 10px">  *     @type string $cancel_reply_link    The translatable 'cancel reply' button label. Default 'Cancel reply'.
</span><span class="cx" style="display: block; padding: 0 10px">  *     @type string $label_submit         The translatable 'submit' button label. Default 'Post a comment'.
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ *     @type string $submit_button        HTML format for the Submit button.
+ *                                        Default: '<input name="%1$s" type="submit" id="%2$s" class="%3$s" value="%4$s" />'.
+ *     @type string $submit_field         HTML format for the markup surrounding the Submit button and comment hidden
+ *                                        fields. Default: '<p class="form-submit">%1$s %2$s</a>', where %1$s is the
+ *                                        submit button markup and %2$s is the comment hidden fields.
</ins><span class="cx" style="display: block; padding: 0 10px">  *     @type string $format               The comment form format. Default 'xhtml'. Accepts 'xhtml', 'html5'.
</span><span class="cx" style="display: block; padding: 0 10px">  * }
</span><span class="cx" style="display: block; padding: 0 10px">  * @param int|WP_Post $post_id Post ID or WP_Post object to generate the form for. Default current post.
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -2236,6 +2242,8 @@
</span><span class="cx" style="display: block; padding: 0 10px">                'title_reply_to'       => __( 'Leave a Reply to %s' ),
</span><span class="cx" style="display: block; padding: 0 10px">                'cancel_reply_link'    => __( 'Cancel reply' ),
</span><span class="cx" style="display: block; padding: 0 10px">                'label_submit'         => __( 'Post Comment' ),
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                'submit_button'        => '<input name="%1$s" type="submit" id="%2$s" class="%3$s" value="%4$s" />',
+               'submit_field'         => '<p class="form-submit">%1$s %2$s</p>',
</ins><span class="cx" style="display: block; padding: 0 10px">                 'format'               => 'xhtml',
</span><span class="cx" style="display: block; padding: 0 10px">        );
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -2350,12 +2358,46 @@
</span><span class="cx" style="display: block; padding: 0 10px">                                                echo apply_filters( 'comment_form_field_comment', $args['comment_field'] );
</span><span class="cx" style="display: block; padding: 0 10px">                                                ?>
</span><span class="cx" style="display: block; padding: 0 10px">                                                <?php echo $args['comment_notes_after']; ?>
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                                                <p class="form-submit">
-                                                       <input name="<?php echo esc_attr( $args['name_submit'] ); ?>" type="submit" id="<?php echo esc_attr( $args['id_submit'] ); ?>" class="<?php echo esc_attr( $args['class_submit'] ); ?>" value="<?php echo esc_attr( $args['label_submit'] ); ?>" />
-                                                       <?php comment_id_fields( $post_id ); ?>
-                                               </p>
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+
</ins><span class="cx" style="display: block; padding: 0 10px">                                                 <?php
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                                                $submit_button = sprintf(
+                                                       $args['submit_button'],
+                                                       esc_attr( $args['name_submit'] ),
+                                                       esc_attr( $args['id_submit'] ),
+                                                       esc_attr( $args['class_submit'] ),
+                                                       esc_attr( $args['label_submit'] )
+                                               );
+
</ins><span class="cx" style="display: block; padding: 0 10px">                                                 /**
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                                                 * Filter the submit button for the comment form to display.
+                                                *
+                                                * @since 4.2.0
+                                                *
+                                                * @param string $submit_button HTML markup for the submit button.
+                                                * @param array  $args          Arguments passed to `comment_form()`.
+                                                */
+                                               $submit_button = apply_filters( 'comment_form_submit_button', $submit_button, $args );
+
+                                               $submit_field = sprintf(
+                                                       $args['submit_field'],
+                                                       $submit_button,
+                                                       get_comment_id_fields( $post_id )
+                                               );
+
+                                               /**
+                                                * Filter the submit field for the comment form to display.
+                                                *
+                                                * The submit field includes the submit button, hidden fields for the
+                                                * comment form, and any wrapper markup.
+                                                *
+                                                * @since 4.2.0
+                                                *
+                                                * @param string $submit_field HTML markup for the submit field.
+                                                * @param array  $args         Arguments passed to `comment_form()`.
+                                                */
+                                               echo apply_filters( 'comment_form_submit_field', $submit_field, $args );
+
+                                               /**
</ins><span class="cx" style="display: block; padding: 0 10px">                                                  * Fires at the bottom of the comment form, inside the closing </form> tag.
</span><span class="cx" style="display: block; padding: 0 10px">                                                 *
</span><span class="cx" style="display: block; padding: 0 10px">                                                 * @since 1.5.0
</span></span></pre></div>
<a id="trunktestsphpunittestscommentcommentFormphp"></a>
<div class="addfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Added: trunk/tests/phpunit/tests/comment/commentForm.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/tests/phpunit/tests/comment/commentForm.php                         (rev 0)
+++ trunk/tests/phpunit/tests/comment/commentForm.php   2015-03-10 19:07:31 UTC (rev 31699)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -0,0 +1,55 @@
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+<?php
+
+/**
+ * @group comment
+ */
+class Tests_Comment_CommentForm extends WP_UnitTestCase {
+       public function test_default_markup_for_submit_button_and_wrapper() {
+               $p = $this->factory->post->create();
+
+               $args = array(
+                       'name_submit' => 'foo-name',
+                       'id_submit' => 'foo-id',
+                       'class_submit' => 'foo-class',
+                       'label_submit' => 'foo-label',
+               );
+               $form = get_echo( 'comment_form', array( $args, $p ) );
+
+               $button = '<input name="foo-name" type="submit" id="foo-id" class="foo-class" value="foo-label" />';
+               $hidden = get_comment_id_fields( $p );
+               $this->assertRegExp( '|<p class="form\-submit">\s*' . $button . '\s*' . $hidden . '\s*|', $form );
+       }
+
+       public function test_custom_submit_button() {
+               $p = $this->factory->post->create();
+
+               $args = array(
+                       'name_submit' => 'foo-name',
+                       'id_submit' => 'foo-id',
+                       'class_submit' => 'foo-class',
+                       'label_submit' => 'foo-label',
+                       'submit_button' => '<input name="custom-%1$s" type="submit" id="custom-%2$s" class="custom-%3$s" value="custom-%4$s" />'
+               );
+               $form = get_echo( 'comment_form', array( $args, $p ) );
+
+               $button = '<input name="custom-foo-name" type="submit" id="custom-foo-id" class="custom-foo-class" value="custom-foo-label" />';
+               $this->assertContains( $button, $form );
+       }
+
+       public function test_custom_submit_field() {
+               $p = $this->factory->post->create();
+
+               $args = array(
+                       'name_submit' => 'foo-name',
+                       'id_submit' => 'foo-id',
+                       'class_submit' => 'foo-class',
+                       'label_submit' => 'foo-label',
+                       'submit_field' => '<p class="my-custom-submit-field">%1$s %2$s</p>'
+               );
+               $form = get_echo( 'comment_form', array( $args, $p ) );
+
+               $button = '<input name="foo-name" type="submit" id="foo-id" class="foo-class" value="foo-label" />';
+               $hidden = get_comment_id_fields( $p );
+               $this->assertRegExp( '|<p class="my\-custom\-submit\-field">\s*' . $button . '\s*' . $hidden . '\s*|', $form );
+       }
+}
</ins></span></pre>
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