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Homephp教程php手册Model修改之添加getOne函数

Model修改之添加getOne函数:只查询一条数据
Model中有find获取一条数据,但是只能用于本身的模型
Model中有query函数根据sql查询一个列表,但是对于只查询一条数据来说,有些不方便,所以重新写了一个只查询一条数据库的函数:    /**<br>      * SQL查询(只取一条数据)<br>      * @access public<br>      * @param string $sql  SQL指令<br>      * @param mixed $parse  是否需要解析SQL<br>      * @return mixed<br>      */<br>     public function getOne($sql,$parse=false) {<br>         if(!is_bool($parse) && !is_array($parse)) {<br>             $parse = func_get_args();<br>             array_shift($parse);<br>         }<br>         if (!preg_match("/LIMIT/i", $sql)) {<br>             $sql = preg_replace('/[,;]$/i', '', trim($sql)) . ' LIMIT 1;';<br>         }<br>         $sql  =   $this->parseSql($sql,$parse);<br>         $resultSet = $this->db->query($sql);<br>         if(false === $resultSet) {<br>             return false;<br>         }<br>         if(empty($resultSet)) {<br>             return null;<br>         }<br>         return $resultSet[0];<br>     }

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