Php SQLSTATE[HY093]：参数编号无效：未定义参数。。。

我一直在得到SQLSTATE[HY093]错误，但我似乎找不到它的来源。我试图使用表单的参数将一行插入到数据库表中

我从表单中提取了所有参数，它们都正常工作和显示

$q = "INSERT INTO members (mid, firstname, lastname, username, password, email, phone, street, location, gender, ccnumber, expirymonth, expiryyear) VALUES (NULL, :firstName, :lastName, :username, :password, :email, :phone, :street, :location, :gender, :ccnumber, :expmonth, :expyear);";  
$query = $dbConnect->prepare($q);
    $enc_password = crypt($password,$username);
    //echo 'It is: '.$enc_password.' ';
    //echo 'It is: '.$lastName.' ';
$query->bindParam(":firstname",$firstName);
$query->bindParam(":lastname",$lastName);
    $query->bindParam(":username",$username);
    $query->bindParam(":password",$enc_password);
    $query->bindParam(":email",$email);
$query->bindParam(":phone",$phone);
    $query->bindParam(":street",$street);
    $query->bindParam(":location",$location);
    $query->bindParam(":gender",$gender);
$query->bindParam(":ccnumber",$ccnumber);
    $query->bindParam(":expirymonth",$expmonth);
    $query->bindParam(":expiryyear",$expyear);
    //$query->debugDumpParams();
$result = $query->execute();
return $result;

提前感谢：）

您有骆驼箱：

$q = "INSERT ... :firstName, :lastName ...

然后是小写：

$query->bindParam(":firstname",$firstName);
$query->bindParam(":lastname",$lastName);

看起来像是区分大小写的问题

您的查询中还包含：

:expmonth, :expyear

然而，你将它们绑定为：

$query->bindParam(":expirymonth",$expmonth);
$query->bindParam(":expiryyear",$expyear);

$query->bindParam（“：expirymonth”，$expmonth）； $query->bindParam（“：expiryyear”，$expyear）

我想，您在查询中没有定义“expirymonth”和“expiryyear”。

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相反，您将其命名为“：expmonth，：expyear”

我下面的答案是否有帮助？