警告：mysqli_num_rows（）期望参数1为mysqli_result，第55行的admin \updatestudent.php中给出布尔值 [英] Warning: mysqli_num_rows() expects parameter 1 to be mysqli_result, boolean given in admin\updatestudent.php on line 55

问题描述

mysqli_num_rows（）要求参数1为mysqli_result，第55行的C：\ xampp \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\
我尝试过：

mysqli_num_rows() expects parameter 1 to be mysqli_result, boolean given in C:\xampp\htdocs\nick\admin\updatestudent.php on line 55

What I have tried:

<?php 
session_start();

if(isset($_SESSION['uid']))
{
echo "";  

}
else
{
header('location: ../login.php');

}
?>
<?php
include('header.php'); 
include('titlehead.php');

?>






<table align="center"><tbody><tr><th>Enter Standerd</th><td>
</td><th>Enter Student Name</th><td></td><td colspan="2"></td></tr></tbody></table>


 
<?php
if(isset($_POST['submit']))
{
include('../dbcon.php');

$standerd = $_POST['standerd'];
$name = $_POST['stuname'];

$sql="SELECT * FROM `studentinfo` WHERE `standerd`='$standerd' AND `name` LIKE `%$name%`  ";
$run=mysqli_query($con,$sql);

if(mysqli_num_rows($run)<1)
{

echo "";
}
else
{
$count=0;
while($data=mysqli_fetch_assoc($run))
{
$count++;
?>  
<?php

}
}


}
?>           

<table align="center" width="80%" border="1" style="margin-top: 10px"><tbody><tr style="background-color: #000; color: #fff"><th>No</th><th>Image</th><th>Name</th><th>ROLL NO</th><th>Edit</th></tr><tr><td colspan="5">No Records Found</td></tr><tr><td><?php echo $count; ?></td><td><img scr="../dataimg/<?php echo $data['image']; ?>" style="max-width:100px;"</td><td><?php echo $data['name']; ?></td><td><?php echo $data['rollno']; ?></td><td>Edit</td></tr></tbody></table>

推荐答案

_SESSION [' uid']））
{
echo <温泉n class =code-string>;

}
else
{
header（' location：../ login.php'）;

}
？>
<？ php
include（' header.php'）;
include（' titlehead.php'）;

？>






< table align = center > < tbody > < tr > ; < th > 输入Standerd < / th > < td >
< / td > < th > 输入学生姓名< / th > < td > < ; / td > < td colspan = 2 > < / td > < / tr > < / tbody > < / table >



<？ php
if（isset（

_SESSION['uid'])) { echo ""; } else { header('location: ../login.php'); } ?> <?php include('header.php'); include('titlehead.php'); ?> <table align="center"><tbody><tr><th>Enter Standerd</th><td> </td><th>Enter Student Name</th><td></td><td colspan="2"></td></tr></tbody></table> <?php if(isset(

_POST [' submit']））
{
include（ ' ../ dbcon.php'）;

_POST['submit'])) { include('../dbcon.php');

standerd =

standerd =

这篇关于警告：mysqli_num_rows（）期望参数1为mysqli_result，第55行的admin \updatestudent.php中给出布尔值的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！