Merge pull request #377 from rtCamp/fix/redis-db-oob-crash

Handle Predis Exception when Database is Out of Bounds.

Author: Vedant-Gandhi

admin/class-predis-purger.php

@@ -43,7 +43,7 @@ public function __construct() {
 		$username = $nginx_helper_admin->options['redis_username'];
 		$password = $nginx_helper_admin->options['redis_password'];
 
-		if( empty( $nginx_helper_admin->options['redis_unix_socket'] ) ) {
+		if( ! empty( $nginx_helper_admin->options['redis_unix_socket'] ) ) {
 			$predis_args['path'] = $nginx_helper_admin->options['redis_unix_socket'];
 		} else {
 			$predis_args['host'] = $nginx_helper_admin->options['redis_hostname'];;
@@ -60,14 +60,15 @@ public function __construct() {
 
 		try {
 			$this->redis_object->connect();
+			
+			if( 0 !== $nginx_helper_admin->options['redis_database'] ) {
+				$this->redis_object->select( $nginx_helper_admin->options['redis_database'] );
+			}
 		} catch ( Exception $e ) {
 			$this->log( $e->getMessage(), 'ERROR' );
 			return;
 		}
 
-		if( $nginx_helper_admin->options['redis_database'] !== 0 ) {
-			$this->redis_object->select($nginx_helper_admin->options['redis_database']);
-		}
 
 	}