我对此感到非常生气,我不知道这种简单的情况怎么会这么复杂而且无法奏效。
基本上:
$lastInsertId = mysqli_insert_id($query);
echo $lastInsertId;
返回NULL
我的$查询运行正常,插入完美。任何人都知道为什么我没有得到最后一个插入ID?
答案 0 :(得分:3)
什么是$query
?您必须将mysqli链接作为参数($link = mysqli_connect(...)
)传递。也许你的$ query是mysqli_query或其他的结果。
mixed mysqli::mysqli_insert_id ( mysqli $link )
答案 1 :(得分:0)
//you follow the folow the bellow code
<?php
$con=mysqli_connect("localhost","my_user","my_password","my_db");
// Check connection
if (mysqli_connect_errno())
{
echo "Failed to connect to MySQL: " . mysqli_connect_error();
}
mysqli_query($con,"INSERT INTO Persons (FirstName,LastName,Age)
VALUES ('Glenn','Quagmire',33)");
// Print auto-generated id//
//NOTE: $con link should be in ()
echo "New record has id: " . mysqli_insert_id($con);
mysqli_close($con);
?>