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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/56748">56748</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/56748","name":"Review Commit"}}</script></dd>
<dt style="float: left; width: 6em; font-weight: bold">Author</dt> <dd>westonruter</dd>
<dt style="float: left; width: 6em; font-weight: bold">Date</dt> <dd>2023-09-29 19:45:53 +0000 (Fri, 29 Sep 2023)</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'>Script Loader: Harden removal of script tag wrappers.

* Add `wp_remove_surrounding_empty_script_tags()` to more precisely remove script tag wrappers and warn when doing it wrong.
* Add clarifying comments for XML escaping logic in `wp_get_inline_script_tag()`.
* Leverage `WP_HTML_Tag_Processor` in `test_remove_frameless_preview_messenger_channel`.
* Reuse `assertEqualMarkup` in `test_blocking_dependent_with_delayed_dependency`.
* Normalize whitespace in `parse_markup_fragment` for `assertEqualMarkup`.

Follow-up to <a href="https://core.trac.wordpress.org/changeset/56687">[56687]</a>.
Props dmsnell, westonruter, flixos90.
See <a href="https://core.trac.wordpress.org/ticket/58664">#58664</a>.</pre>

<h3>Modified Paths</h3>
<ul>
<li><a href="#trunkphpcsxmldist">trunk/phpcs.xml.dist</a></li>
<li><a href="#trunksrcwpincludesclasswpcustomizemanagerphp">trunk/src/wp-includes/class-wp-customize-manager.php</a></li>
<li><a href="#trunksrcwpincludesfunctionsphp">trunk/src/wp-includes/functions.php</a></li>
<li><a href="#trunksrcwpincludesscriptloaderphp">trunk/src/wp-includes/script-loader.php</a></li>
<li><a href="#trunksrcwpincludesthemetemplatesphp">trunk/src/wp-includes/theme-templates.php</a></li>
<li><a href="#trunksrcwpincludesthemephp">trunk/src/wp-includes/theme.php</a></li>
<li><a href="#trunksrcwpincludeswidgetsclasswpwidgetarchivesphp">trunk/src/wp-includes/widgets/class-wp-widget-archives.php</a></li>
<li><a href="#trunksrcwpincludeswidgetsclasswpwidgetcategoriesphp">trunk/src/wp-includes/widgets/class-wp-widget-categories.php</a></li>
<li><a href="#trunksrcwploginphp">trunk/src/wp-login.php</a></li>
<li><a href="#trunktestsphpunittestscustomizemanagerphp">trunk/tests/phpunit/tests/customize/manager.php</a></li>
<li><a href="#trunktestsphpunittestsdependenciesscriptsphp">trunk/tests/phpunit/tests/dependencies/scripts.php</a></li>
</ul>

<h3>Added Paths</h3>
<ul>
<li><a href="#trunktestsphpunittestsdependencieswpRemoveSurroundingEmptyScriptTagsphp">trunk/tests/phpunit/tests/dependencies/wpRemoveSurroundingEmptyScriptTags.php</a></li>
</ul>

</div>
<div id="patch">
<h3>Diff</h3>
<a id="trunkphpcsxmldist"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/phpcs.xml.dist</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/phpcs.xml.dist      2023-09-29 17:11:21 UTC (rev 56747)
+++ trunk/phpcs.xml.dist        2023-09-29 19:45:53 UTC (rev 56748)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -171,6 +171,7 @@
</span><span class="cx" style="display: block; padding: 0 10px">                                <element value="lastChild"/>
</span><span class="cx" style="display: block; padding: 0 10px">                                <element value="nodeName"/>
</span><span class="cx" style="display: block; padding: 0 10px">                                <element value="nodeType"/>
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                                <element value="nodeValue"/>
</ins><span class="cx" style="display: block; padding: 0 10px">                                 <element value="parentNode"/>
</span><span class="cx" style="display: block; padding: 0 10px">                                <element value="preserveWhiteSpace"/>
</span><span class="cx" style="display: block; padding: 0 10px">                                <element value="textContent"/>
</span></span></pre></div>
<a id="trunksrcwpincludesclasswpcustomizemanagerphp"></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/class-wp-customize-manager.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-includes/class-wp-customize-manager.php      2023-09-29 17:11:21 UTC (rev 56747)
+++ trunk/src/wp-includes/class-wp-customize-manager.php        2023-09-29 19:45:53 UTC (rev 56748)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -474,7 +474,7 @@
</span><span class="cx" style="display: block; padding: 0 10px">                        } )( wp.customize, <?php echo wp_json_encode( $settings ); ?> );
</span><span class="cx" style="display: block; padding: 0 10px">                        </script>
</span><span class="cx" style="display: block; padding: 0 10px">                        <?php
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        $message .= wp_get_inline_script_tag( str_replace( array( '<script>', '</script>' ), '', ob_get_clean() ) );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 $message .= wp_get_inline_script_tag( wp_remove_surrounding_empty_script_tags( ob_get_clean() ) );
</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">                wp_die( $message );
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -2109,7 +2109,7 @@
</span><span class="cx" style="display: block; padding: 0 10px">                } )();
</span><span class="cx" style="display: block; padding: 0 10px">                </script>
</span><span class="cx" style="display: block; padding: 0 10px">                <?php
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                wp_print_inline_script_tag( str_replace( array( '<script>', '</script>' ), '', ob_get_clean() ) );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         wp_print_inline_script_tag( wp_remove_surrounding_empty_script_tags( ob_get_clean() ) );
</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 class="lines" style="display: block; padding: 0 10px; color: #888">@@ -2230,7 +2230,7 @@
</span><span class="cx" style="display: block; padding: 0 10px">                        })( _wpCustomizeSettings.values );
</span><span class="cx" style="display: block; padding: 0 10px">                </script>
</span><span class="cx" style="display: block; padding: 0 10px">                <?php
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                wp_print_inline_script_tag( str_replace( array( '<script>', '</script>' ), '', ob_get_clean() ) );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         wp_print_inline_script_tag( wp_remove_surrounding_empty_script_tags( ob_get_clean() ) );
</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 class="lines" style="display: block; padding: 0 10px; color: #888">@@ -5019,7 +5019,7 @@
</span><span class="cx" style="display: block; padding: 0 10px">                        ?>
</span><span class="cx" style="display: block; padding: 0 10px">                </script>
</span><span class="cx" style="display: block; padding: 0 10px">                <?php
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                wp_print_inline_script_tag( str_replace( array( '<script>', '</script>' ), '', ob_get_clean() ) );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         wp_print_inline_script_tag( wp_remove_surrounding_empty_script_tags( ob_get_clean() ) );
</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></div>
<a id="trunksrcwpincludesfunctionsphp"></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/functions.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-includes/functions.php       2023-09-29 17:11:21 UTC (rev 56747)
+++ trunk/src/wp-includes/functions.php 2023-09-29 19:45:53 UTC (rev 56748)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -7619,7 +7619,7 @@
</span><span class="cx" style="display: block; padding: 0 10px">        }());
</span><span class="cx" style="display: block; padding: 0 10px">        </script>
</span><span class="cx" style="display: block; padding: 0 10px">        <?php
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-        wp_print_inline_script_tag( str_replace( array( '<script>', '</script>' ), '', ob_get_clean() ) );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ wp_print_inline_script_tag( wp_remove_surrounding_empty_script_tags( ob_get_clean() ) );
</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></div>
<a id="trunksrcwpincludesscriptloaderphp"></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/script-loader.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-includes/script-loader.php   2023-09-29 17:11:21 UTC (rev 56747)
+++ trunk/src/wp-includes/script-loader.php     2023-09-29 19:45:53 UTC (rev 56748)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -2853,9 +2853,43 @@
</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"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-        // Ensure markup is XHTML compatible if not HTML5.
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ /*
+        * XHTML extracts the contents of the SCRIPT element and then the XML parser
+        * decodes character references and other syntax elements. This can lead to
+        * misinterpretation of the script contents or invalid XHTML documents.
+        *
+        * Wrapping the contents in a CDATA section instructs the XML parser not to
+        * transform the contents of the SCRIPT element before passing them to the
+        * JavaScript engine.
+        *
+        * Example:
+        *
+        *     <script>console.log('&hellip;');</script>
+        *
+        *     In an HTML document this would print "&hellip;" to the console,
+        *     but in an XHTML document it would print "…" to the console.
+        *
+        *     <script>console.log('An image is <img> in HTML');</script>
+        *
+        *     In an HTML document this would print "An image is <img> in HTML",
+        *     but it's an invalid XHTML document because it interprets the `<img>`
+        *     as an empty tag missing its closing `/`.
+        *
+        * @see https://www.w3.org/TR/xhtml1/#h-4.8
+        */
</ins><span class="cx" style="display: block; padding: 0 10px">         if ( ! $is_html5 ) {
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                $javascript = str_replace( ']]>', ']]]]><![CDATA[>', $javascript ); // Escape any existing CDATA section.
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         /*
+                * If the string `]]>` exists within the JavaScript it would break
+                * out of any wrapping CDATA section added here, so to start, it's
+                * necessary to escape that sequence which requires splitting the
+                * content into two CDATA sections wherever it's found.
+                *
+                * Note: it's only necessary to escape the closing `]]>` because
+                * an additional `<![CDATA[` leaves the contents unchanged.
+                */
+               $javascript = str_replace( ']]>', ']]]]><![CDATA[>', $javascript );
+
+               // Wrap the entire escaped script inside a CDATA section.
</ins><span class="cx" style="display: block; padding: 0 10px">                 $javascript = sprintf( "/* <![CDATA[ */\n%s\n/* ]]> */", $javascript );
</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">@@ -3299,3 +3333,51 @@
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">        return $editor_settings;
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+
+/**
+ * Removes leading and trailing _empty_ script tags.
+ *
+ * This is a helper meant to be used for literal script tag construction
+ * within `wp_get_inline_script_tag()` or `wp_print_inline_script_tag()`.
+ * It removes the literal values of "<script>" and "</script>" from
+ * around an inline script after trimming whitespace. Typlically this
+ * is used in conjunction with output buffering, where `ob_get_clean()`
+ * is passed as the `$contents` argument.
+ *
+ * Example:
+ *
+ *     // Strips exact literal empty SCRIPT tags.
+ *     $js = '<script>sayHello();</script>;
+ *     'sayHello();' === wp_remove_surrounding_empty_script_tags( $js );
+ *
+ *     // Otherwise if anything is different it warns in the JS console.
+ *     $js = '<script type="text/javascript">console.log( "hi" );</script>';
+ *     'console.error( ... )' === wp_remove_surrounding_empty_script_tags( $js );
+ *
+ * @private
+ * @since 6.4.0
+ *
+ * @see wp_print_inline_script_tag()
+ * @see wp_get_inline_script_tag()
+ *
+ * @param string $contents Script body with manually created SCRIPT tag literals.
+ * @return string Script body without surrounding script tag literals, or
+ *                original contents if both exact literals aren't present.
+ */
+function wp_remove_surrounding_empty_script_tags( $contents ) {
+       $contents = trim( $contents );
+       $opener   = '<SCRIPT>';
+       $closer   = '</SCRIPT>';
+
+       if (
+               strlen( $contents ) > strlen( $opener ) + strlen( $closer ) &&
+               strtoupper( substr( $contents, 0, strlen( $opener ) ) ) === $opener &&
+               strtoupper( substr( $contents, -strlen( $closer ) ) ) === $closer
+       ) {
+               return substr( $contents, strlen( $opener ), -strlen( $closer ) );
+       } else {
+               $error_message = __( 'Expected string to start with script tag (without attributes) and end with script tag, with optional whitespace.' );
+               _doing_it_wrong( __FUNCTION__, $error_message, '6.4' );
+               return sprintf( 'console.error(%s)', wp_json_encode( __( 'Function wp_remove_surrounding_empty_script_tags() used incorrectly in PHP.' ) . ' ' . $error_message ) );
+       }
+}
</ins></span></pre></div>
<a id="trunksrcwpincludesthemetemplatesphp"></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/theme-templates.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-includes/theme-templates.php 2023-09-29 17:11:21 UTC (rev 56747)
+++ trunk/src/wp-includes/theme-templates.php   2023-09-29 19:45:53 UTC (rev 56748)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -205,7 +205,7 @@
</span><span class="cx" style="display: block; padding: 0 10px">        }() );
</span><span class="cx" style="display: block; padding: 0 10px">        </script>
</span><span class="cx" style="display: block; padding: 0 10px">        <?php
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-        $skip_link_script = str_replace( array( '<script>', '</script>' ), '', ob_get_clean() );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ $skip_link_script = wp_remove_surrounding_empty_script_tags( ob_get_clean() );
</ins><span class="cx" style="display: block; padding: 0 10px">         $script_handle    = 'wp-block-template-skip-link';
</span><span class="cx" style="display: block; padding: 0 10px">        wp_register_script( $script_handle, false );
</span><span class="cx" style="display: block; padding: 0 10px">        wp_add_inline_script( $script_handle, $skip_link_script );
</span></span></pre></div>
<a id="trunksrcwpincludesthemephp"></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/theme.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-includes/theme.php   2023-09-29 17:11:21 UTC (rev 56747)
+++ trunk/src/wp-includes/theme.php     2023-09-29 19:45:53 UTC (rev 56748)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -3800,7 +3800,7 @@
</span><span class="cx" style="display: block; padding: 0 10px">                }());
</span><span class="cx" style="display: block; padding: 0 10px">        </script>
</span><span class="cx" style="display: block; padding: 0 10px">        <?php
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-        wp_print_inline_script_tag( str_replace( array( '<script>', '</script>' ), '', ob_get_clean() ) );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ wp_print_inline_script_tag( wp_remove_surrounding_empty_script_tags( ob_get_clean() ) );
</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></div>
<a id="trunksrcwpincludeswidgetsclasswpwidgetarchivesphp"></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/widgets/class-wp-widget-archives.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-includes/widgets/class-wp-widget-archives.php        2023-09-29 17:11:21 UTC (rev 56747)
+++ trunk/src/wp-includes/widgets/class-wp-widget-archives.php  2023-09-29 19:45:53 UTC (rev 56748)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -120,7 +120,7 @@
</span><span class="cx" style="display: block; padding: 0 10px"> })();
</span><span class="cx" style="display: block; padding: 0 10px"> </script>
</span><span class="cx" style="display: block; padding: 0 10px">                        <?php
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        wp_print_inline_script_tag( str_replace( array( '<script>', '</script>' ), '', ob_get_clean() ) );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 wp_print_inline_script_tag( wp_remove_surrounding_empty_script_tags( ob_get_clean() ) );
</ins><span class="cx" style="display: block; padding: 0 10px">                 } else {
</span><span class="cx" style="display: block; padding: 0 10px">                        $format = current_theme_supports( 'html5', 'navigation-widgets' ) ? 'html5' : 'xhtml';
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span></span></pre></div>
<a id="trunksrcwpincludeswidgetsclasswpwidgetcategoriesphp"></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/widgets/class-wp-widget-categories.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-includes/widgets/class-wp-widget-categories.php      2023-09-29 17:11:21 UTC (rev 56747)
+++ trunk/src/wp-includes/widgets/class-wp-widget-categories.php        2023-09-29 19:45:53 UTC (rev 56748)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -108,7 +108,7 @@
</span><span class="cx" style="display: block; padding: 0 10px"> </script>
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                        <?php
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        wp_print_inline_script_tag( str_replace( array( '<script>', '</script>' ), '', ob_get_clean() ) );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 wp_print_inline_script_tag( wp_remove_surrounding_empty_script_tags( ob_get_clean() ) );
</ins><span class="cx" style="display: block; padding: 0 10px">                 } else {
</span><span class="cx" style="display: block; padding: 0 10px">                        $format = current_theme_supports( 'html5', 'navigation-widgets' ) ? 'html5' : 'xhtml';
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span></span></pre></div>
<a id="trunksrcwploginphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-login.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-login.php    2023-09-29 17:11:21 UTC (rev 56747)
+++ trunk/src/wp-login.php      2023-09-29 19:45:53 UTC (rev 56748)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -105,7 +105,7 @@
</span><span class="cx" style="display: block; padding: 0 10px">                ?>
</span><span class="cx" style="display: block; padding: 0 10px">                <script>if("sessionStorage" in window){try{for(var key in sessionStorage){if(key.indexOf("wp-autosave-")!=-1){sessionStorage.removeItem(key)}}}catch(e){}};</script>
</span><span class="cx" style="display: block; padding: 0 10px">                <?php
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                wp_print_inline_script_tag( str_replace( array( '<script>', '</script>' ), '', ob_get_clean() ) );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         wp_print_inline_script_tag( wp_remove_surrounding_empty_script_tags( ob_get_clean() ) );
</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 class="lines" style="display: block; padding: 0 10px; color: #888">@@ -419,12 +419,12 @@
</span><span class="cx" style="display: block; padding: 0 10px">        if ( ! empty( $input_id ) ) {
</span><span class="cx" style="display: block; padding: 0 10px">                ob_start();
</span><span class="cx" style="display: block; padding: 0 10px">                ?>
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                <script>
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         <script type="text/javascript">
</ins><span class="cx" style="display: block; padding: 0 10px">                 try{document.getElementById('<?php echo $input_id; ?>').focus();}catch(e){}
</span><span class="cx" style="display: block; padding: 0 10px">                if(typeof wpOnload==='function')wpOnload();
</span><span class="cx" style="display: block; padding: 0 10px">                </script>
</span><span class="cx" style="display: block; padding: 0 10px">                <?php
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                wp_print_inline_script_tag( str_replace( array( '<script>', '</script>' ), '', ob_get_clean() ) );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         wp_print_inline_script_tag( wp_remove_surrounding_empty_script_tags( ob_get_clean() ) );
</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 class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1362,7 +1362,7 @@
</span><span class="cx" style="display: block; padding: 0 10px">                                        ?>
</span><span class="cx" style="display: block; padding: 0 10px">                                        <script>setTimeout( function(){ new wp.customize.Messenger({ url: '<?php echo wp_customize_url(); ?>', channel: 'login' }).send('login') }, 1000 );</script>
</span><span class="cx" style="display: block; padding: 0 10px">                                        <?php
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                                        wp_print_inline_script_tag( str_replace( array( '<script>', '</script>' ), '', ob_get_clean() ) );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                                 wp_print_inline_script_tag( wp_remove_surrounding_empty_script_tags( ob_get_clean() ) );
</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 class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1627,7 +1627,7 @@
</span><span class="cx" style="display: block; padding: 0 10px">                        }());
</span><span class="cx" style="display: block; padding: 0 10px">                        </script>
</span><span class="cx" style="display: block; padding: 0 10px">                        <?php
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        wp_print_inline_script_tag( str_replace( array( '<script>', '</script>' ), '', ob_get_clean() ) );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 wp_print_inline_script_tag( wp_remove_surrounding_empty_script_tags( ob_get_clean() ) );
</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">                login_footer();
</span></span></pre></div>
<a id="trunktestsphpunittestscustomizemanagerphp"></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/customize/manager.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/tests/phpunit/tests/customize/manager.php   2023-09-29 17:11:21 UTC (rev 56747)
+++ trunk/tests/phpunit/tests/customize/manager.php     2023-09-29 19:45:53 UTC (rev 56748)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -3135,8 +3135,8 @@
</span><span class="cx" style="display: block; padding: 0 10px">                $manager = new WP_Customize_Manager( array( 'messenger_channel' => 'preview-0' ) );
</span><span class="cx" style="display: block; padding: 0 10px">                ob_start();
</span><span class="cx" style="display: block; padding: 0 10px">                $manager->remove_frameless_preview_messenger_channel();
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                $output = ob_get_clean();
-               $this->assertStringContainsString( '<script', $output );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         $processor = new WP_HTML_Tag_Processor( ob_get_clean() );
+               $this->assertTrue( $processor->next_tag( 'script' ), 'Failed to find expected SCRIPT element in output.' );
</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></div>
<a id="trunktestsphpunittestsdependenciesscriptsphp"></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/dependencies/scripts.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/tests/phpunit/tests/dependencies/scripts.php        2023-09-29 17:11:21 UTC (rev 56747)
+++ trunk/tests/phpunit/tests/dependencies/scripts.php  2023-09-29 19:45:53 UTC (rev 56748)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -260,8 +260,11 @@
</span><span class="cx" style="display: block; padding: 0 10px">                wp_enqueue_script( 'main-script-a3', '/main-script-a3.js', array(), null, compact( 'strategy' ) );
</span><span class="cx" style="display: block; padding: 0 10px">                wp_enqueue_script( 'dependent-script-a3', '/dependent-script-a3.js', array( 'main-script-a3' ), null );
</span><span class="cx" style="display: block; padding: 0 10px">                $output   = get_echo( 'wp_print_scripts' );
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                $expected = str_replace( "'", '"', "<script type='text/javascript' src='/main-script-a3.js' id='main-script-a3-js' data-wp-strategy='{$strategy}'></script>" );
-               $this->assertStringContainsString( $expected, $output, 'Blocking dependents must force delayed dependencies to become blocking.' );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         $expected = <<<JS
+                       <script type='text/javascript' src='/main-script-a3.js' id='main-script-a3-js' data-wp-strategy='{$strategy}'></script>
+                       <script id="dependent-script-a3-js" src="/dependent-script-a3.js" type="text/javascript"></script>
+JS;
+               $this->assertEqualMarkup( $expected, $output, 'Blocking dependents must force delayed dependencies to become blocking.' );
</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 class="lines" style="display: block; padding: 0 10px; color: #888">@@ -2997,6 +3000,15 @@
</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"> 
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                // Normalize other whitespace nodes.
+               $xpath = new DOMXPath( $dom );
+               foreach ( $xpath->query( '//text()' ) as $node ) {
+                       /** @var DOMText $node */
+                       if ( preg_match( '/^\s+$/', $node->nodeValue ) ) {
+                               $node->nodeValue = ' ';
+                       }
+               }
+
</ins><span class="cx" style="display: block; padding: 0 10px">                 return $dom;
</span><span class="cx" style="display: block; padding: 0 10px">        }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span></span></pre></div>
<a id="trunktestsphpunittestsdependencieswpRemoveSurroundingEmptyScriptTagsphp"></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/dependencies/wpRemoveSurroundingEmptyScriptTags.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/tests/phpunit/tests/dependencies/wpRemoveSurroundingEmptyScriptTags.php                             (rev 0)
+++ trunk/tests/phpunit/tests/dependencies/wpRemoveSurroundingEmptyScriptTags.php       2023-09-29 19:45:53 UTC (rev 56748)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -0,0 +1,78 @@
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+<?php
+
+/**
+ * Test wp_remove_surrounding_empty_script_tags().
+ *
+ * @group dependencies
+ * @group scripts
+ * @ticket 58664
+ * @covers ::wp_remove_surrounding_empty_script_tags
+ */
+class Tests_Functions_wpRemoveSurroundingEmptyScriptTags extends WP_UnitTestCase {
+
+       /**
+        * Data provider for test.
+        *
+        * @return array
+        */
+       public function get_data_to_test_wp_remove_surrounding_empty_script_tags() {
+               $error_js = 'console.error("Function wp_remove_surrounding_empty_script_tags() used incorrectly in PHP. Expected string to start with script tag (without attributes) and end with script tag, with optional whitespace.")';
+               return array(
+                       'basic_case'            => array(
+                               '<script>alert("hello")</script>',
+                               'alert("hello")',
+                               false,
+                       ),
+                       'BASIC_CASE'            => array(
+                               '<SCRIPT>alert("hello")</SCRIPT>',
+                               'alert("hello")',
+                               false,
+                       ),
+                       'whitespace_basic_case' => array(
+                               '  <script>alert("hello")</script>  ',
+                               'alert("hello")',
+                               false,
+                       ),
+                       'missing_tags'          => array(
+                               'alert("hello")',
+                               $error_js,
+                               true,
+                       ),
+                       'missing_start_tag'     => array(
+                               'alert("hello")</script>',
+                               $error_js,
+                               true,
+                       ),
+                       'missing_end_tag'       => array(
+                               '<script>alert("hello")',
+                               $error_js,
+                               true,
+                       ),
+                       'erroneous attributes'  => array(
+                               '<script type="text/javascript">alert("hello")</script>',
+                               $error_js,
+                               true,
+                       ),
+               );
+       }
+
+       /**
+        * Test scenarios for wp_remove_surrounding_empty_script_tags().
+        *
+        * @dataProvider get_data_to_test_wp_remove_surrounding_empty_script_tags
+        *
+        * @param string $input                 Input.
+        * @param string $expected              Expected.
+        * @param bool   $expect_doing_it_wrong Whether input is _doing_it_wrong().
+        */
+       public function test_wp_remove_surrounding_empty_script_tags( $input, $expected, $expect_doing_it_wrong ) {
+               if ( $expect_doing_it_wrong ) {
+                       $this->setExpectedIncorrectUsage( 'wp_remove_surrounding_empty_script_tags' );
+               }
+
+               $this->assertSame(
+                       $expected,
+                       wp_remove_surrounding_empty_script_tags( $input )
+               );
+       }
+}
</ins><span class="cx" style="display: block; padding: 0 10px">Property changes on: trunk/tests/phpunit/tests/dependencies/wpRemoveSurroundingEmptyScriptTags.php
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