在我的大学数据库项目中,我的SQL中有一个自动增量字段滚动编号。我想要的是,当新录取发生并插入学生记录时,它会在同一页面上显示所有发现,包括卷号。然而,尽管我尽了最大的努力,但它在卷号中返回0。如何在php中显示自动增量数据表格mysql
下面是代码:
<?php
$con = mysqli_connect("localhost", "root", "") or die("conection error");
mysqli_select_db($con, "hamdard university") or die("dbase error");
if (isset($_POST['subbtn'])) {
$r = "SELECT RollNo FROM admission_form";
$result = mysqli_query($con, $r);
if (mysqli_query($con, $r)) {
$last_id = mysqli_insert_id($con);
}
$n = $_POST['txtname'];
$f = $_POST['txtfac'];
$s = $_POST['txtsem'];
$sql = "insert into admission_form(name,faculty,semester)values ('$n','$f','$s')";
mysqli_query($con, $sql);
echo "<table border=1>
<th>RollNo</th>
<th>Name</th>
<th>Faculty</th>
<th>Semester</th>";
echo "<tr>";
echo "<td>";
echo $last_id;
echo "</td>";
echo "<td>";
echo $n;
echo "</td>";
echo "<td>";
echo $f;
echo "</td>";
echo "<td>";
echo $s;
echo "</td>";
echo "<br>";
}
?>
<html>
<head></head>
<body>
<form name="f1" action="" method="POST">
RollNo:
<input type="text" name="txtroll" readonly> Name:
<input type="text" name="txtname"> Faculty:
<input type="text" name="txtfac"> Semester:
<input type="text" name="txtsem">
<input type="submit" value="done" name="subbtn">
</form>
</body>
</html>
恶魔?也许你的意思是朋友?如果是这样,友谊记录如何? – Strawberry