Display warning if zip extension is not installed

Author: slawkens

admin/pages/plugins.php

@@ -21,7 +21,13 @@
 	warning('Plugin installation and management is disabled in Settings.<br/>If you wish to enable, go to Settings and enable <strong>Enable Plugins Manage</strong>.');
 }
 else {
-	$twig->display('admin.plugins.form.html.twig');
+	$pluginUploadEnabled = true;
+	if(!\class_exists('\ZipArchive')) {
+		error('Please install PHP zip extension. Plugins upload disabled until then.');
+		$pluginUploadEnabled = false;
+	}
+
+	$twig->display('admin.plugins.form.html.twig', ['pluginUploadEnabled' => $pluginUploadEnabled]);
 
 	if (isset($_POST['uninstall'])) {
 		$uninstall = $_POST['uninstall'];

system/templates/admin.plugins.form.html.twig

@@ -14,7 +14,7 @@
 				</div>
 			</div>
 			<div class="card-footer">
-				<button type="submit" class="btn btn-info">Upload</button>
+				<button type="submit" class="btn btn-info" {% if not pluginUploadEnabled %}disabled{% endif %}>Upload</button>
 			</div>
 		</form>
 	</div>