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<title>[47573] trunk/src/wp-includes/theme.php: Themes: Block theme activation if it requires a higher version of PHP or WordPress.</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/47573">47573</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/47573","name":"Review Commit"}}</script></dd>
<dt style="float: left; width: 6em; font-weight: bold">Author</dt> <dd>SergeyBiryukov</dd>
<dt style="float: left; width: 6em; font-weight: bold">Date</dt> <dd>2020-04-13 15:26:37 +0000 (Mon, 13 Apr 2020)</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'>Themes: Block theme activation if it requires a higher version of PHP or WordPress.
Introduce `validate_theme_requirements()` for validating a theme's WordPress and PHP version requirements.
Follow-up to <a href="https://core.trac.wordpress.org/changeset/44978">[44978]</a> and <a href="https://core.trac.wordpress.org/changeset/45546">[45546]</a> for plugins.
Props afragen, audrasjb, SergeyBiryukov.
See <a href="https://core.trac.wordpress.org/ticket/43992">#43992</a>.</pre>
<h3>Modified Paths</h3>
<ul>
<li><a href="#trunksrcwpincludesthemephp">trunk/src/wp-includes/theme.php</a></li>
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<h3>Diff</h3>
<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 2020-04-12 14:24:38 UTC (rev 47572)
+++ trunk/src/wp-includes/theme.php 2020-04-13 15:26:37 UTC (rev 47573)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -733,6 +733,11 @@
</span><span class="cx" style="display: block; padding: 0 10px"> function switch_theme( $stylesheet ) {
</span><span class="cx" style="display: block; padding: 0 10px"> global $wp_theme_directories, $wp_customize, $sidebars_widgets;
</span><span class="cx" style="display: block; padding: 0 10px">
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ $requirements = validate_theme_requirements( $stylesheet );
+ if ( is_wp_error( $requirements ) ) {
+ wp_die( $requirements );
+ }
+
</ins><span class="cx" style="display: block; padding: 0 10px"> $_sidebars_widgets = null;
</span><span class="cx" style="display: block; padding: 0 10px"> if ( 'wp_ajax_customize_save' === current_action() ) {
</span><span class="cx" style="display: block; padding: 0 10px"> $old_sidebars_widgets_data_setting = $wp_customize->get_setting( 'old_sidebars_widgets_data' );
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -881,6 +886,78 @@
</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">+ * Validates the theme requirements for WordPress version and PHP version.
+ *
+ * Uses the information from `Requires at least` and `Requires PHP` headers
+ * defined in the theme's `style.css` file.
+ *
+ * If the headers are not present in the theme's stylesheet file,
+ * `readme.txt` is also checked as a fallback.
+ *
+ * @since 5.5.0
+ *
+ * @param string $stylesheet Directory name for the theme.
+ * @return true|WP_Error True if requirements are met, WP_Error on failure.
+ */
+function validate_theme_requirements( $stylesheet ) {
+ $theme = wp_get_theme( $stylesheet );
+
+ $requirements = array(
+ 'requires' => ! empty( $theme->get( 'RequiresWP' ) ) ? $theme->get( 'RequiresWP' ) : '',
+ 'requires_php' => ! empty( $theme->get( 'RequiresPHP' ) ) ? $theme->get( 'RequiresPHP' ) : '',
+ );
+
+ $readme_file = $theme->theme_root . '/' . $stylesheet . '/readme.txt';
+
+ if ( file_exists( $readme_file ) ) {
+ $readme_headers = get_file_data(
+ $readme_file,
+ array(
+ 'requires' => 'Requires at least',
+ 'requires_php' => 'Requires PHP',
+ ),
+ 'theme'
+ );
+
+ $requirements = array_merge( $readme_headers, $requirements );
+ }
+
+ $compatible_wp = is_wp_version_compatible( $requirements['requires'] );
+ $compatible_php = is_php_version_compatible( $requirements['requires_php'] );
+
+ if ( ! $compatible_wp && ! $compatible_php ) {
+ return new WP_Error(
+ 'theme_wp_php_incompatible',
+ sprintf(
+ /* translators: %s: Theme name. */
+ _x( '<strong>Error:</strong> Current WordPress and PHP versions do not meet minimum requirements for %s.', 'theme' ),
+ $theme->display( 'Name' )
+ )
+ );
+ } elseif ( ! $compatible_php ) {
+ return new WP_Error(
+ 'theme_php_incompatible',
+ sprintf(
+ /* translators: %s: Theme name. */
+ _x( '<strong>Error:</strong> Current PHP version does not meet minimum requirements for %s.', 'theme' ),
+ $theme->display( 'Name' )
+ )
+ );
+ } elseif ( ! $compatible_wp ) {
+ return new WP_Error(
+ 'theme_wp_incompatible',
+ sprintf(
+ /* translators: %s: Theme name. */
+ _x( '<strong>Error:</strong> Current WordPress version does not meet minimum requirements for %s.', 'theme' ),
+ $theme->display( 'Name' )
+ )
+ );
+ }
+
+ return true;
+}
+
+/**
</ins><span class="cx" style="display: block; padding: 0 10px"> * Retrieve all theme modifications.
</span><span class="cx" style="display: block; padding: 0 10px"> *
</span><span class="cx" style="display: block; padding: 0 10px"> * @since 3.1.0
</span></span></pre>
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