* Preprocess update data
//1. Connect to the database and create the pdo object
try { $pdo = new PDO('mysql:dbname=php','root','root'); } catch (PDOException $e) { exit($e->getMessage()); }
//2. Prepare the sql statement
$sql = "UPDATE user SET email=:email WHERE user_id=:user_id";
//3. Create Preprocessing object stmt object
if($stmt = $pdo->prepare($sql)) {
//4. Bind parameters to stmt object and execute
//Prepare parameters
$param = ['email'=>'lwt@qq.com','user_id'=>5]; //绑定参数到SQL语句对象并执行 if ($stmt -> execute($param)){ //rowCount()返回更新的数量,如果大于0表示有记录被更新啦 if ($stmt->rowCount()>0) { echo '成功更新了'.$stmt->rowCount().'条记录'; } else { //等于0表示没有记录被更新 echo '没有记录被更新'; } } else { //执行失败的信息 print_r($stmt->errorInfo()); exit(); } } else { //$stmt语句对象创建失败 print_r($pdo->errorInfo()); exit(); }