PDO Mysql，想要更新甚至插入数据

Question

我在这里遇到一些问题，我想更新 CRUD 中的数据，甚至添加新数据（如插入）。

有解决办法吗？谢谢

有我的代码，

    if ($valid) {
      $pdo = Database::connect();
      $pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
      $sql = "UPDATE customers
              SET name = ?, email = ?, address = ?
              WHERE id = ?";
      $q = $pdo->prepare($sql);
      $q->execute(array($name,$email,$address));
      Database::disconnect();
      header("Location: index.php");
    }
  }else {
    $pdo = Database::connect();
    $pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
    $sql = "SELECT * FROM customers WHERE id = ?";
    $q = $pdo->prepare($sql);
    $q->execute(array($id));
    $data = $q->fetch(PDO::FETCH_ASSOC);
    $name = $data['name'];
    $email = $data['email'];
    $address = $data['address'];
    Database::disconnect();
  }

Answer 1

绑定 id 以及准备好的语句

    if ($valid) {
      $pdo = Database::connect();
      $pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
      $values = array($name,$email,$address);
      if($id) {
          $sql = "UPDATE customers
                  SET name = ?, email = ?, address = ?
                  WHERE id = ?";
          $values[] = $id;
       } else {
          $sql = "INSERT INTO customers (name, email, address)
                  VALUES (?,?,?)";
       }
       $q = $pdo->prepare($sql);
       $q->execute($values);
      Database::disconnect();
      header("Location: index.php");
    }
  }else {
    $pdo = Database::connect();
    $pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
    $sql = "SELECT * FROM customers WHERE id = ?";
    $q = $pdo->prepare($sql);
    $q->execute(array($id));
    $data = $q->fetch(PDO::FETCH_ASSOC);
    $name = $data['name'];
    $email = $data['email'];
    $address = $data['address'];
    Database::disconnect();
  }

参见第 8 行（省略 **）

编辑为 $id 为空的情况添加了插入查询基于对评论的理解

Answer 2

绑定变量的数量与标记的数量不匹配

$sql = "UPDATE customers
      SET name = ?, email = ?, address = ?
      WHERE id = ?";
$q = $pdo->prepare($sql);
$q->execute(array($name,$email,$address));

你有四个代币？应该有四个参数，截至 :

$q->execute(array($name,$email,$address,$id));

注意不要将 header("Location: index.php"); 和 index.php 放在同一个文件中，因为那样会循环，你会得到如下错误：

your webhost redirected you too many times

PDO Mysql，想要更新甚至插入数据

PDO Mysql, want to UPDATE even INSERT the data

php

mysql

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crud