Question

我无法使用我的代码将params绑定到Mysql Query，我在这里做错了什么？

错误

致命错误：未捕获异常'PDOException'，消息'SQLSTATE [HY093]：参数号无效：绑定变量数与/ Users / warren / Sites / Frame Work / Modules / User Login /中的标记数不匹配classes / db.php：34堆栈跟踪：＃0 / Users / warren / Sites / Frame Work / Modules / User Login / classes / db.php（34）：PDOStatement-＆gt; execute（）＃1 / Users / warren /站点/框架工作/模块/用户登录/类/ db.php（48）：dbConnect-＆gt; get_contents（）#main {main}抛出/ Users / warren / Sites / Frame Work / Modules / User Login / classes /第34行的db.php

CODE

<?php 
include '../../../../config.php';

$dbUser = $config['username'];
$dbPass = $config['password'];

class dbConnect {

    public function connect($dbUser,$dbPass) {
        $this->dbUser = $dbUser;
        $this->dbPass = $dbPass;
        try {
            $this->connect = new PDO('mysql:hostname=localhost;dbname=totalrisk', $this->dbUser, $this->dbPass);
            $this->connect->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
            return $this->connect;
        } catch (Exception $e) {
            echo 'ERROR: ' . $e->getMessage();
        }
    }

    public function select_table($table) {
        $this->select_table = $table;
        echo $this->select_table;
    }

    public function select_col($col) {
        $this->select_col = $col;
        echo $this->select_col;
    }

    public function get_contents() {
        $stmt = $this->connect->prepare('SELECT * FROM :table');
        $stmt->bindParam(':table', $this->table , PDO::PARAM_STR);
             $stmt->execute();

             $result = $stmt->fetchAll();

             while($row = $stmt->fetch()) {
                print_r($row);
             }
    }
}

$conn = new dbConnect();
$conn->connect($dbUser,$dbPass);
$conn->select_table('users');
$conn->select_col('site_name');
$conn->get_contents();
?>

Answer 1

表格不能绑定，请使用：

$this->connect->prepare('SELECT * FROM ' . $this->select_table);

另请注意，您使用表格，您应该使用select_table

PHP PDO无法在类中绑定参数

1 个答案: