public function addExtensions($extensions)
    {
        $extensions = array_merge($this->_extensions, (array)$extensions);
        $this->_extensions = array_unique($extensions);
    }
public function addExtensions($extensions)
    {
        $extensions = array_merge($this->_extensions, (array)$extensions);
        $this->_extensions = array_unique($extensions);
    }
public function addExtensions ( $ extensions ) { $ extensions = array_merge ( $ this -> _extensions , ( array ) $ extensions ) ; $ this -> _extensions = array_unique ( $ extensions ) ; }
Add additional extensions to what is already in current scope

@param string|array $extensions One or more extensions to add
@return void
Add additional extensions to what is already in current scope