[英]Access the id of the object inserted after a prepared statement in PHP using MYSQLi
I need the id of the last inserted object. 我需要最后插入对象的id。 I use prepared statements to avoid sql injection. 我使用预准备语句来避免sql注入。 But i'm not sure how to obtain the id. 但我不知道如何获得身份证。
$sql = "INSERT IGNORE INTO faculty (id, term, role, prefix, first_name,
middle_name, last_name, suffix) VALUES (?,?,?,?,?,?,?,?)";
if (!($stmt = $mysqli->prepare($sql)))
echo "Faculty Prepare failed: (" . $mysqli->errno . ") " . $mysqli->error;
$stmt->bind_param('sissssss',
$faculty['id'],
$faculty['term'],
$faculty['role'],
$faculty->name->prefix,
$faculty->name->first,
$faculty->name->middle,
$faculty->name->last,
$faculty->name->suffix
);
if (!$stmt->execute())
echo "Faculty Execute failed: (" . $mysqli->errno . ") " . $mysqli->error;
$result = $stmt->insert_id;
echo "\n Result:" . $result;
$stmt->close();
The result is 0 always despite there being an entry in the database 尽管数据库中有条目,但结果始终为0
Solution The element was being inserted into the database. 解决方案该元素正在插入数据库中。 The problem was when I had created the table id wasn't an integer it was a varchar which represented an employee id. 问题是,当我创建表时,id不是一个整数,它是一个表示员工ID的varchar。 To fix this, i added the employee id as an additional column in the table and used the default id int auto_increment primary key and it worked. 为了解决这个问题,我将employee id添加为表中的附加列,并使用默认id int auto_increment主键,并且它工作正常。
Try changing $result = $stmt->get_result();
尝试更改$result = $stmt->get_result();
to $result = $stmt->insert_id;
to $result = $stmt->insert_id;
get_result()
is more for SELECT
queries, rather than INSERT
s. get_result()
更适用于SELECT
查询,而不是INSERT
。
http://php.net/manual/en/mysqli-stmt.get-result.php http://php.net/manual/en/mysqli-stmt.get-result.php
http://php.net/manual/en/mysqli-stmt.insert-id.php http://php.net/manual/en/mysqli-stmt.insert-id.php
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