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Modify the content of MySQL + PHP drop-down box

2022-04-23 02:37:00 【Colored sponge】

Based on the previous search drop-down box , After the content is added to the specific location , Then modify it . 

<?php
error_reporting(0);// add error_reporting(0); No warning will pop up 
header("Content-type:text/html;charset=utf-8");// Prevent Chinese miscoding 

$con = mysqli_connect("localhost","root"," password "," Linked database name ");
mysqli_query($con,'set names utf8');
if (!$con){
	echo' Failed to link database ！';
}
?>
<!DOCTYPE html>
<html>
	<head></head>
	<body>
<form action="" method="get" > //action If it is empty, it means form Submit form to current page 
<select name="id" >
	<option > Please select </option>
  <?php	
                   $sql="select * from userinfo  ";
					$res=mysqli_query($con,$sql); 
					
				   while($row=$res->fetch_assoc()){					
				     	//var_dump($row);
					?>	
			
					<option> 
					   <?php echo $row["id"];?>
						<?php echo $row["username"];?> 
							
					</option>
						
                <?php
				 }
				 ?>
 
 </select>
 	
 <input type="submit" value=" Submit ">

 </form>


<?php
$id = $_GET["id"];
// according to id Find the data to be operated at present 
$sql= "select * from userinfo where id = '$id'";
// Inquire about 
 $result=$con->query($sql);
 // var_dump($result);//dedao
 // Get specific information 
 $res = $result->fetch_assoc(); 
?>


<form action="" method="get" > 

<br /><br /><br /><br /><br /><br />
<input  type="hidden" value="<?php echo $res['id'];?>  "   name="id" >
<label><b> Modified user name </b></label>
<input type="text" value="<?php echo $res['username'];?>  "   name="username">
	
<label><b> User password </b></label>
<input type="text" value="<?php echo $res['password'];?>  "  name="password" >
	
<label><b> User level :</b></label>
	
<input type="text" value="<?php echo $res['level'];?>  "   name="level">

<button type="submit" name="" > Modify the information </button>

 </form>

<?php

// modify php Code 

$id = $_GET["id"];
$user = $_GET['username'];
$pwd = $_GET['password'];
$level = $_GET['level'];
// according to id Find the data to be operated at present 

$sql= "update  userinfo set username = '$user', password ='$pwd',level='$level' WHERE id = '$id'";
// perform 
 $result=$con->query($sql);

?>
</body>
</html>

版权声明
本文为[Colored sponge]所创，转载请带上原文链接，感谢
https://yzsam.com/2022/04/202204230236378198.html

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