如何将'series'的值存储为会话变量？

Question

标题

我如何从下拉列表中获取city_id的选定值并存储在会话中？

`

<form action="dynamic.php" method="post">
<select name="city" > 
<option value="">Select City</option>
	<?php
	$sql="select * from city ORDER BY city_name";
	$result=mysqli_query($con,$sql);
	while($row=mysqli_fetch_array($result)){
		?>
		<option value="<?php echo $row["city_id"];?>"><?php echo $row["city_name"];?></option>
		<?php
	}    
	?>
</select>



</form>
<?php
session_start();
if(!empty($_POST['city'])){
    $_SESSION['city'] = $_POST['city'];
}
 ?>

Answer 1

您需要session_start（）;

然后

$ _ SESSION ['city'] ='somecity';

Answer 2

您需要在使用var：

的每个页面中使用它

session_start();

然后你可以添加这个

$_SESSION["myvar"] = "something"