Implement ConnectionParameters::__toString().

lib/Predis/ConnectionParameters.php

@@ -83,6 +83,7 @@ class ConnectionParameters {
             $query  = explode('&', $parsed['query']);
             $parsed = array_reduce($query, 'self::paramsExtractor', $parsed);
         }
+        unset($parsed['query']);
         return $this->filter($parsed);
     }
 
@@ -118,4 +119,25 @@ class ConnectionParameters {
         $value = $this->tryInitializeValue($parameter);
         return isset($value);
     }
+
+    public function __toString() {
+        $str = null;
+        if ($this->scheme === 'unix') {
+            $str = "{$this->scheme}://{$this->path}";
+        }
+        else {
+            $str = "{$this->scheme}://{$this->host}:{$this->port}";
+        }
+
+        $query = array();
+        $reject = array('scheme', 'host', 'port', 'password', 'path');
+        foreach ($this->_parameters as $k => $v) {
+            if (in_array($k, $reject) || $v === null) {
+                continue;
+            }
+            $v = $v === false ? '0' : $v;
+            $query[] = $k . '=' . ($v === false ? '0' : $v);
+        }
+        return count($query) > 0 ? ($str . '/?' . implode('&', $query)) : $str;
+    }
 }