php - 查询失败 SQLSTATE[42000] : Syntax error or access violation: 1064 You have an error in your SQL syntax

Question

查询失败:

SQLSTATE[42000]: Syntax error or access violation: 1064 You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ':c2 , add=:c3 , mob=:c4 WHERE id=:c1' at line 1

我在这个程序中有一个语法错误，我无法更新数据库中的“cus”表。请任何人解决这个错误。

谢谢

我的 PHP 代码如下:

if(isset($_POST['submit']))
{
    $c1=$_POST['cid1'];
    $c2=$_POST['cname1'];
    $c3=$_POST['cadd1'];
    $c4=$_POST['cmob1'];

    $sql1 = "UPDATE 'cus' set 'name'=':c2' , 'add'=':c3' , 'mob'=':c4'  WHERE 'id'=':c1'";

    $st1=$conn->prepare($sql1);
    $st1->bindParam(":c2",$c2,PDO::PARAM_STR);
    $st1->bindParam(":c3",$c3,PDO::PARAM_STR);
    $st1->bindParam(":c4",$c4,PDO::PARAM_STR);
    $st1->bindParam(":c1",$c1,PDO::PARAM_INT);
    $st1->execute();
    header("location:frm.php");


}

Answer 1

您需要在表名和列名周围使用反引号，或者如果名称不是保留字，则完全不使用引号。单引号用于字符串。您也不得将占位符放在引号内。

$sql1 = "UPDATE `cus` set `name`=:c2 , `add`=:c3 , `mob`=:c4  WHERE `id`=:c1";