Ticket #43992: 43992.15.diff

wp-admin/includes/plugin.php

@@ -31 +31 @@
  *     Network: Optional. Specify "Network: true" to require that a plugin is activated
  *          across all sites in an installation. This will prevent a plugin from being
  *          activated on a single site when Multisite is enabled.
+ *     Requires WP: Optional. Specify the minimum required WordPress version.
+ *     Requires PHP: Optional. Specify the minimum required PHP version.
  *      * / # Remove the space to close comment
  *
  * Some users have issues with opening large files and manipulating the contents
@@ -46 +48 @@
  * reading.
  *
  * @since 1.5.0
+ * @since 5.2.0 Added `RequiresWP` and `RequiresPHP`.
  *
  * @param string $plugin_file Absolute path to the main plugin file.
  * @param bool   $markup      Optional. If the returned data should have HTML markup applied.
@@ -63 +66 @@
  *     @type string $TextDomain  Plugin textdomain.
  *     @type string $DomainPath  Plugins relative directory path to .mo files.
  *     @type bool   $Network     Whether the plugin can only be activated network-wide.
+ *     @type string $RequiresWP  Minimum required version of WordPress.
+ *     @type string $RequiresPHP Minimum required version of PHP.
  * }
  */
 function get_plugin_data( $plugin_file, $markup = true, $translate = true ) {
@@ -77 +82 @@
                 'TextDomain'  => 'Text Domain',
                 'DomainPath'  => 'Domain Path',
                 'Network'     => 'Network',
+                'RequiresWP'  => 'Requires WP',
+                'RequiresPHP' => 'Requires PHP',
                 // Site Wide Only is deprecated in favor of Network.
                 '_sitewide'   => 'Site Wide Only',
         );
@@ -213 +220 @@
         return $plugin_data;
 }
 
+/**
+ * Get and return plugin data used for validation.
+ *
+ * @uses get_file_data() to parse local `readme.txt`.
+ * If data not in `readme.txt` see if a plugin header `Requires WP` or `Requires PHP` exists and use that.
+ *
+ * @since 5.2.0
+ * @see validate_plugin_requirements()
+ *
+ * @param string $plugin_file Path to the plugin file relative to the plugins directory.
+ *
+ * @return array $plugin_data Array of plugin data for validation.
+ */
+function get_plugin_validation_data( $plugin_file ) {
+        $validation_headers = array(
+                'requires'     => 'requires at least',
+                'requires_php' => 'requires php',
+        );
+        $plugin_data        = null;
+        $readme_file        = WP_PLUGIN_DIR . '/' . dirname( $plugin_file ) . '/readme.txt';
+        if ( file_exists( $readme_file ) ) {
+                $plugin_data = get_file_data( $readme_file, $validation_headers );
+        }
+
+        /*
+         * Plugin has no `readme.txt` file but might have
+         * `Requires WP` and/or `Requires PHP` headers we can use.
+         */
+        if ( null === $plugin_data ) {
+                $plugin_data['file']         = $plugin_file;
+                $plugin_headers              = get_plugin_data( WP_PLUGIN_DIR . '/' . $plugin_file, false, false );
+                $plugin_data['requires']     = $plugin_headers['RequiresWP'];
+                $plugin_data['requires_php'] = $plugin_headers['RequiresPHP'];
+        }
+
+        return $plugin_data;
+}
+
 /**
  * Get a list of a plugin's files.
  *
@@ -675 +720 @@
  * ensure that the success redirection will update the error redirection.
  *
  * @since 2.5.0
+ * @since 5.2.0 Test for WordPress version and PHP version compatibility.
  *
  * @param string $plugin       Path to the plugin file relative to the plugins directory.
  * @param string $redirect     Optional. URL to redirect to.
@@ -699 +745 @@
                 return $valid;
         }
 
+        if ( ! validate_plugin_requirements( $plugin ) ) {
+                return new WP_Error( 'unmet_requirements', __( 'Plugin does not meet minimum WordPress and/or PHP requirements.' ) );
+        }
+
         if ( ( $network_wide && ! isset( $current[ $plugin ] ) ) || ( ! $network_wide && ! in_array( $plugin, $current ) ) ) {
                 if ( ! empty( $redirect ) ) {
                         wp_redirect( add_query_arg( '_error_nonce', wp_create_nonce( 'plugin-activation-error_' . $plugin ), $redirect ) ); // we'll override this later if the plugin can be included without fatal error
@@ -1199 +1249 @@
         return 0;
 }
 
+/**
+ * Validate the plugin requirements for WP version and PHP version.
+ *
+ * @since 5.2.0
+ * @see activate_plugin()
+ *
+ * @param string $plugin Path to the plugin file relative to the plugins directory.
+ *
+ * @return bool Default to true and if requirements met, false if not.
+ */
+function validate_plugin_requirements( $plugin ) {
+        $plugin_data  = get_plugin_validation_data( $plugin );
+        $wp_requires  = isset( $plugin_data['requires'] ) ? $plugin_data['requires'] : null;
+        $php_requires = isset( $plugin_data['requires_php'] ) ? $plugin_data['requires_php'] : null;
+
+        return is_wp_compatible( $wp_requires ) && is_php_compatible( $php_requires );
+}
+
 /**
  * Whether the plugin can be uninstalled.
  *

wp-includes/functions.php

@@ -6830 +6830 @@
         );
         echo'</p>';
 }
+
+/**
+ * Check compatibility with current WordPress version.
+ *
+ * @since 5.2.0
+ *
+ * @param string $requires Minimum WordPress version from API.
+ *
+ * @return bool True if is compatible or empty, false if not.
+ */
+function is_wp_compatible( $requires ) {
+        $wp_version = get_bloginfo( 'version' );
+        return empty( $requires ) || version_compare( $wp_version, $requires, '>=' );
+}
+
+/**
+ * Check compatibility with current PHP version.
+ *
+ * @since 5.2.0
+ *
+ * @param string $requires Minimum PHP version from API.
+ *
+ * @return bool True if is compatible or empty, false if not.
+ */
+function is_php_compatible( $requires ) {
+        return empty( $requires ) || version_compare( phpversion(), $requires, '>=' );
+}