Question

我开始使用PDO和MySQL代替mysqli。所以，我尝试定义这个简单的函数：

public function getIntro($table) {
            $stmt = $this->db->prepare("SELECT * FROM $table ORDER BY rand() LIMIT ?");
            $stmt->execute(array(6));
            return $stmt->fetchAll(PDO::FETCH_ASSOC);
        }

但是，这样做，函数返回一个空数组。考虑到与db的连接正常工作，错误在哪里？

由于

Answer 1

试试这个：

public function getIntro($table) {
        $stmt = $this->db->prepare("SELECT * FROM $table ORDER BY rand() LIMIT ?");
        $stmt->bindValue(1, 6);
        $stmt->execute();
        return $stmt->fetchAll(PDO::FETCH_ASSOC);
    }

或者这个：

public function getIntro($table) {
            $stmt = $this->db->prepare("SELECT * FROM $table ORDER BY rand() LIMIT :limit");
            $stmt->execute(array(':limit' => 6));
            return $stmt->fetchAll(PDO::FETCH_ASSOC);
        }

使用PDO和MySql而不是mysqli

1 个答案: