new plugin: remove etags

htaccess/wp-rocket-htaccess-remove-etag/README.md

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+# WP Rocket | Remove ETag
+
+Prevents ETag code to be added to htaccess.
+
+Documentation:
+* [Divi Theme](https://docs.wp-rocket.me/article/657-divi-theme)
+
+To be used with:
+* any setup where ETags should be removed, for example with the Divi theme if font icons are missing in IE 11
+
+Last tested with:
+* WP Rocket 2.11.x
+* WordPress 4.9.x

htaccess/wp-rocket-htaccess-remove-etag/wp-rocket-htaccess-remove-etag.php

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+<?php
+/**
+ * Plugin Name: WP Rocket | Remove ETag
+ * Description: Prevents ETag code to be added to htaccess.
+ * Plugin URI:  https://github.com/wp-media/wp-rocket-helpers/tree/master/htaccess/wp-rocket-htaccess-remove-etag/
+ * Author:      WP Rocket Support Team
+ * Author URI:  http://wp-rocket.me/
+ * License:     GNU General Public License v2 or later
+ * License URI: http://www.gnu.org/licenses/gpl-2.0.html
+ *
+ * Copyright SAS WP MEDIA 2018
+ */
+
+// Namespaces must be declared before any other declaration.
+namespace WP_Rocket\Helpers\htaccess\remove_etag;
+
+// Standard plugin security, keep this line in place.
+defined( 'ABSPATH' ) or die();
+
+/**
+ * Prevents ETag code to be added to htaccess.
+ */
+add_filter ( 'rocket_htaccess_etag', '__return_false');
+
+/**
+ * Updates .htaccess, regenerates WP Rocket config file.
+ *
+ * @author Caspar Hübinger
+ */
+function flush_wp_rocket() {
+
+	if ( ! function_exists( 'flush_rocket_htaccess' )
+	  || ! function_exists( 'rocket_generate_config_file' ) ) {
+		return false;
+	}
+
+	// Update WP Rocket .htaccess rules.
+	flush_rocket_htaccess();
+
+	// Regenerate WP Rocket config file.
+	rocket_generate_config_file();
+}
+register_activation_hook( __FILE__, __NAMESPACE__ . '\flush_wp_rocket' );
+
+/**
+ * Removes customizations, updates .htaccess, regenerates config file.
+ *
+ * @author Caspar Hübinger
+ */
+function deactivate() {
+
+	// Remove all functionality added above.
+	remove_filter ( 'rocket_htaccess_etag', '__return_false');
+
+	// Flush .htaccess rules, and regenerate WP Rocket config file.
+	flush_wp_rocket();
+}
+register_deactivation_hook( __FILE__, __NAMESPACE__ . '\deactivate' );