PHP 与SQL:插入和更新表的功能不起作用
我有一个简单的代码,其中创建和修改表,但表不是一开始就创建的,并且出现以下错误:
未定义的变量:第 28 行的价格
未定义的变量:第 28 行的 newbrand
未定义变量:第 28 行的 newprice
第 28 行:
$conexion-> modify("Mitsubishi",40000000,$price,$newbrand,$newprice);
完整代码:
<?php
class MyDataBase{
private $link;
public function __construct($server,$user,$password,$base){
//Conectar
$this->link = mysql_connect($server,$user,$password);
mysql_select_db($base,$this->link);
}
public function insert($model,$brand,$price){
mysql_query("INSERT INTO autos (model, brand, price) VALUES ($model,'$brand', $price)",$this->link);}
public function modify($model,$brand,$price,$newbrand,$newprice){
mysql_query("UPDATE 'crautos'.'autos' SET 'brand' = '$newbrand',
'price' = '$newprice' WHERE 'autos'.'model' =5 AND 'autos'.'brand' = '$brand' AND 'autos'.'price' ='$price' LIMIT 1" ,$this->link);}
public function __destruct(){
//desconectar
}
}
$conexion = new MyDataBase ('localhost', 'root', '','crcars');
$conexion-> insert(05,"Ford",50000000);
$conexion-> modify("Mitsubishi",40000000,$price,$newbrand,$newprice);
?>
I have a simple code where tables are created and modified, but the tables are not created to start with, and the following errors are appearing:
Undefined variable: price on line 28
Undefined variable: newbrand on line 28
Undefined variable: newprice on line 28
Line 28:
$conexion-> modify("Mitsubishi",40000000,$price,$newbrand,$newprice);
Complete code:
<?php
class MyDataBase{
private $link;
public function __construct($server,$user,$password,$base){
//Conectar
$this->link = mysql_connect($server,$user,$password);
mysql_select_db($base,$this->link);
}
public function insert($model,$brand,$price){
mysql_query("INSERT INTO autos (model, brand, price) VALUES ($model,'$brand', $price)",$this->link);}
public function modify($model,$brand,$price,$newbrand,$newprice){
mysql_query("UPDATE 'crautos'.'autos' SET 'brand' = '$newbrand',
'price' = '$newprice' WHERE 'autos'.'model' =5 AND 'autos'.'brand' = '$brand' AND 'autos'.'price' ='$price' LIMIT 1" ,$this->link);}
public function __destruct(){
//desconectar
}
}
$conexion = new MyDataBase ('localhost', 'root', '','crcars');
$conexion-> insert(05,"Ford",50000000);
$conexion-> modify("Mitsubishi",40000000,$price,$newbrand,$newprice);
?>
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$conexion-> edit("Mitsubishi",40000000,$price,$newbrand,$newprice);
您从未设置过 $price、$newbrand、$newprice 的值。而且你也没有转义你的数据:
同样的修改,你应该转义你的数据,请参阅: http://php.net/manual/fr/function.mysql-real-escape-string.php
$conexion-> modify("Mitsubishi",40000000,$price,$newbrand,$newprice);
You never set the value of $price, $newbrand, $newprice. And also you're not escaping your data :
And same for modify you should escape your datas see : http://php.net/manual/fr/function.mysql-real-escape-string.php