PHP

Question

这是我用于从数据库中删除行的代码：

<?php
$eid = $_GET['eid'];
$con = mysqli_connect("localhost", "root", "","project") or die("Connection failed");
echo "connection is done";
$query = "delete from exam where eid='$eid'";

if ($con->query($query)==TRUE)
{
    echo " record deleted";
}
else 
{
    echo "Error: " . $query . "<br>" . $con->error;
}

$con->close();
?>

else 语句没有被执行。即使在数据库中找不到该值，它也会为每个值显示 "record deleted"。

为什么会这样？我如何验证我的记录已从我的数据库中删除？

Answer 1

您可以使用 mysqli.affected-rows。

考虑以下几点：

$query="delete from exam where eid='$eid'";
if ($con->query($query)==TRUE && $con->affected_rows > 0) {
    echo " record deleted";
} else {
    echo "Error: " . $query . "<br>" . $con->error;
}

PHP - 如何验证记录删除成功

PHP - How to verify record deleted successfully

mysql

delete-row