本文介绍了PHP->PDO 更新声明的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我试图做一个 SQL 查询(insert into users set cash = cash + 20)，谁能帮我处理上述查询的 PDO 准备语句版本?
I was trying to do a SQL query ( insert into users set cash = cash + 20 ),
can anyone help me with the PDO prepared statement version of the above query?
推荐答案
我真的不知道您是要插入还是更新.以下是 PDO 准备好的语句示例.他们假定您已经连接并且 PDO 对象是 $dbh.
I can't really figure out if you're looking to insert or update. Here are PDO prepared statement examples. They assume that you've already connected and that the PDO object is $dbh.
插入:
$sth = $dbh->prepare('INSERT INTO `users` (`cash`) VALUES (?)');
$sth->execute(array(20));
更新:
// All users
$sth = $dbh->prepare('UPDATE `users` SET `cash` = `cash` + ?');
$sth->execute(array(20));
// A specific user (assuming that there's a field name "id")
$sth = $dbh->prepare('UPDATE `users` SET `cash` = `cash` + ? WHERE `id` = ?');
$sth->execute(array(20, $id));
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