00001 <?php 00049 class Zend_Db_Expr 00050 { 00056 protected $_expression; 00057 00064 public function __construct($expression) 00065 { 00066 $this->_expression = (string) $expression; 00067 } 00068 00072 public function __toString() 00073 { 00074 return $this->_expression; 00075 } 00076 00077 }