求问我自己写的这个DB类，哪里错了，插不进数据
<?php<br /> class DB{<br /> private $hostname;<br /> private $username;<br /> private $password;<br /> private $select_db;<br /> private $con;<br /> private $Error;<br /> <br /> public function __construct($hostname,$username,$password,$select_db){<br /> if(!empty($hostname)&&!empty($username)&&!empty($select_db))//检查参数是否为空，否则不赋值<br /> {<br /> $this->hostname = $hostname;<br /> $this->username = $username;<br /> $this->password = $password;<br /> $this->select_db = $select_db;<br /> $this->con = mysql_connect($this->hostname,$this->username,$this->password);<br /> if(!$this->con){<br /> $this->Error = die('Could Not Connect:'.mysql_error);<br /> }<br /> else{<br /> mysql_select_db($this->select_db,$this->con);<br /> }<br /> }<br /> }<br /> public function __destruct(){//退出时结束连接<br /> mysql_close($this->con);<br /> }<br /> public function insert($table,$body){//插入table中的一个数组<br /> $line1 = implode(',',$body);<br /> $line2 = implode(',',array_keys($body));<br /> echo $sql = "INSERT INTO $table ($line2) VALUES ($line1)";<br /> $result = mysql_query($sql,$this->con);<br /> if(!$result){<br /> echo $this->Error;<br /> echo '111';<br /> }<br /> <br /> }<br /> public function update($table,$body){<br /> <br /> }<br /> public function read($table,$keyword){<br /> <br /> }<br /> public function delete($table,$keyword){<br /> <br /> }<br /> public function getLastError(){//返回最后一条错误信息<br /> return $this->Error;<br /> }<br /> }<br />?><?php<br />require('DB.class.php');<br /> $DB = new DB('localhost','root','','dbtest');<br /> $line1 = array(<br /> 'aa'=>'`aa`',<br /> 'bb'=>'`dd`'<br /> );<br /> $DB->insert('1234',$line1);<br />?>
