如何在PHP中将值从页面传递到另一个页面

Question

Im trying to pass a variable value from a page to another page. Im using to go to the next page and I use Session to get the value,

the link variable does working but the price variable doesn't work

Here's the code: index.php

<?php 

  require('connect.php');
  if(!isset($_SESSION)){
    session_start();
  }

 $query  = mysqli_query($connection, "SELECT link, price FROM funnyture WHERE category ='Bed' or category = 'Chairs' or category = 'Tables'") or die("Couldn't find search");
    $count = mysqli_num_rows($query);

    if($count == 0) {
      $output = "There was no row in array";

    } else {

      while($row = mysqli_fetch_array($query)) {
        $link = $row['link'];
        $price = $row['price'];

        echo '

        <form action="Orderform.php" method="post" class="formClass">

          <input name="link" type="image" src="'.$link.'" value="'.$link.'" class="inputClass">
        </form>';
      }
    }   
?>

Orderform.php

<?php include 'navbar2.php' ;?>

    <div class="left">
      <?php
      $_SESSION['link'] = $_POST['link'];
       // $_SESSION['price'] = $_POST['price'];
       echo '<img src="'.$_SESSION['link'] .'">';  
       echo '<p>'.$_GET['price'].'</p>';

      ?>

Help me :)

Answer 1

Only values that are sent by a form will be in the GET or POST array.

From what you are showing I conclude that you don't want to show the field in your form, so make it hidden.

Add this inside your form tag:

<input name="price" type="hidden" value="'.$price.'" class="inputClass">

Also, if you are going to use these values to access the database, be more careful with just taking in variables like this, assume that all user input is wrong and/or dangerous. You would want to look at things like SQL injection and mysqli_escape_string

Answer 2

You are fetching the price using get method and you have not passed it in your redirect url . If you want to fetch that variable on other page using get method then pass it in action url as :

<form action="Orderform.php?price=<?php echo $price; ?>" method="post" class="formClass">

and fetch as :

$price =  $_GET['price'];

Or otherwise pass it using a hidden field inside form and fetch using post method.

<input name="price" type="hidden"  value="'.$price.'" class="inputClass">

and fetch like:

$price = $_POST['price'];

Answer 3

Data can be Send in multiple ways

1. GET or POST
2. Using Session
3. Using cookie

in your orderform.php you are forgot to start session.