消息为“ SQLSTATE [42000]”的未捕获异常“ PDOException”：语法错误或访问冲突：

Question

致命错误：消息为“ SQLSTATE [42000]”的未捕获的异常“ PDOException”：语法错误或访问冲突：1064 SQL语法有错误； 在C：\\ xampp \\ htdocs \\ PhpProject1 \\ userv2.php：120中，检查与您的MySQL服务器版本相对应的手册，以在'“）VALUES（）'的第1'行附近使用正确的语法：堆栈跟踪：＃0 C： \\ xampp \\ htdocs \\ PhpProject1 \\ userv2.php（120）：PDOStatement-> execute（）＃1 C：\\ xampp \\ htdocs \\ PhpProject1 \\ create.php（41）：User-> Save（）＃2 {main}抛出在第120行的C：\\ xampp \\ htdocs \\ PhpProject1 \\ userv2.php中

我们在列名中使用了反斜杠作为列名，这在此处的几篇文章中已得到建议，但它不能完全解决错误。 我读过类似的文章，但找不到解决方案，所以我在填写错误和代码以帮助您。 提前致谢。

    <?php

/*
 * mmber variable decleration...
 */
class User {
    private $ID;
    private $objPDO;
    private $strTableName;
    private $arRelationMap;
    private $blForDeletion;



    private $FirstName;
    private $LastName;
    private $Username;
    private $Password;
    private $EmailAddress;

    private $DateLastLogin;
    private $TimeLastLogin;
    private $DateAccountCreated;
    private $TimeAccountCreated;

    //constructor is use for initialisation for the object
    public function __construct(PDO $objPDO, $id = NULL) {
        $this->strTableName = `system_user`;
        $this->arRelationMap = array(
            `id` => "ID",
            `first_name` => "FirstName",
            `last_name` => "LastName",
            `username` => "Username",
            `md5_pw` => "Password",
            `email_address` => "EmailAddress",
            `date_last_login` => "DateLastLogin",
            `time_last_login` => "TimeLastLogin",
            `date_account_created` => "DateAccountCreated",
            `time_account_created` => "TimeAccountCreated");






            $this->objPDO =$objPDO;
                if (isset($id)) {
                    $this->ID = $id;
                    $strQuery = "SELECT ";
                    foreach ($this->arRelationMap as $key => $value) {
                        $strQuery .= "\"" . $key . "\",";
                    }
                   $strQuery = substr($strQuery, 0, strlen($strQuery)-1);
                   $strQuery .=  "FROM"  . $this->strTableName . " WHERE \"id\" = :eid";
                   $objStatement = $this->objPDO->prepare($strQuery);
                   $objStatement->bindparam(' :eid', $this->ID, PDO::PARAM_INT);
                   $objStatement->execute();
                   $arRow = $objStatement->fetch(PDO::FETCH_ASSOC);
                   foreach($arRow as $key => $value) {
                       $strMember = $this->arRelationMap[$key];
                       if(property_exists($this, $strMember)) {
                           if (is_numeric($value)) {
                               eval('$this->' . $strMember . ' = ' . $value . ';');
                           }
                           else
                           {
                               eval('$this->' . $strMember . ' = "' . $value . '";');
                           };
                       };

                };
    };

}







       public function Save() {
        if (!isset($this->ID)) {
             $strValueList = "";
     $strQuery = 'INSERT INTO "' . $this->strTableName . '"(';
     foreach ($this->arRelationMap as $key => $value) {
            eval('$actualVal = &$this->' . $value .';');
                    if(isset($actualVal)){
                    var_dump($actualVal);
                    $strQuery .= '"' . $key . '", ';
                    $strValueList .= ":$value, ";

        } ; 
            }        






        $strQuery = substr($strQuery, 0, strlen($strQuery) - 2);
     $strValueList = substr($strValueList, 0, strlen($strValueList) - 2);
     $strQuery .= ") VALUES (";
     $strQuery .= $strValueList;
     $strQuery .= ")";
     unset($objStatement);
     $objStatement = $this->objPDO->prepare($strQuery);
     foreach ($this->arRelationMap as $key => $value){
         eval('$actualVal = &$this->' . $value . ';');
         if (isset($actualVal)){
             if ((is_int($actualVal)) || ($actualVal == NULL)) {
                       $objStatement->bindValue(':' . $value, $actualVal, PDO::PARAM_INT);
                    }
                    else
                    {
                     $objStatement->bindValue(':' . $value, $actualVal, PDO::PARAM_STR);  
                    };
                };
         }
         $objStatement->execute();
         $this->ID = $this->objPDO->lastInsertId($this->strTableName . "_id_seq");

         }
     }

Answer 1

MySQL INSERT的正确语法是：

INSERT INTO tbl_name (col1,col2,col3) VALUES(15,col1*2,'string');

并不是 ：

INSERT INTO "tbl_name" ("col1","col2","col3") VALUES(15,col1*2,'string');