PHP PDO无法在类中绑定参数
我无法让我的代码将参数绑定到Mysql查询,我在这里做错了什么 错误 致命错误:未捕获异常“PDOException”,消息为“SQLSTATE[HY093]:参数编号无效:绑定变量的数量与/Users/warren/Sites/Frame-Work/Modules/User-Login/classes/db.php中的标记数量不匹配。php:34堆栈跟踪:#0/Users/warren/Sites/Frame-Work/Modules/User-Login/classes/db.php(34):PDOStatement->execute()#1/Users/warren/Sites/framework/Modules/User Login/classes/db.php(48):第34行的dbConnect->get_contents()#2{main}抛出/Users/warren/Sites/framework/Modules/User Login/classes/db.php 代码PHP PDO无法在类中绑定参数,php,class,pdo,Php,Class,Pdo,我无法让我的代码将参数绑定到Mysql查询,我在这里做错了什么 错误 致命错误:未捕获异常“PDOException”,消息为“SQLSTATE[HY093]:参数编号无效:绑定变量的数量与/Users/warren/Sites/Frame-Work/Modules/User-Login/classes/db.php中的标记数量不匹配。php:34堆栈跟踪:#0/Users/warren/Sites/Frame-Work/Modules/User-Login/classes/db.php(34)
<?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();
?>
不能绑定表格,请使用以下方法:
$this->connect->prepare('SELECT * FROM ' . $this->select_table);
另外请注意,您使用的表应该使用select_table您在哪里看到可以将表名指定为绑定参数?只是想知道是否有教程教人们这些东西。