I have used a form to send two variables from one page to another. Then I wanted the user to be able to click on a link (staying on the website) then once on the third page the variables to still be able to be used.
First page (which works fine):
<html>
<head>
<title> Form </title>
</head>
<body>
<form action="result.php" method="post">
Name: <input type="text" name="name"><br>
E-mail: <input type="text" name="email"><br>
<input type="submit">
</form>
<br />
</body>
</html>
Then the second page (which displays the variables correctly):
<html>
<body>
Welcome <?php echo $_POST['name']; ?><br>
Your email address is: <?php echo $_POST['email']; ?>
link
</body>
</html>
Then when you click on the link from the second to the third (below) it doesn't work:
<html>
<head>
<title> Form </title>
</head>
<body>
<?php echo $_POST['name']; ?>
</body>
</html>
Thanks in advance for any help!
You have to put $_POST['name'] and $_POST['email'] in session variables.
One way to do that is:
link
On name.php you will have them as $_GET variables
if you just want to use these values on 3rd page only then better to use the above GET method. Otherwise you can put these values in session
Your second (result.php) page should look like this:
<?php
$_SESSION['name']= $_POST['name'];
$_SESSION['email']= $_POST['email'];
?>
<html>
<body>
Welcome <?php echo $_POST['name']; ?><br>
Your email address is: <?php echo $_POST['email']; ?>
link
</body>
</html>
And you third page (name.php) will work when you put it like this:
<html>
<head>
<title> Form </title>
</head>
<body>
<?php echo $_SESSION['name']; ?>
</body>
</html>
Related
Consider following html page:
index.html
<html>
<body>
<form action="welcome.php" method="post">
Name: <input type="text" name="name"><br>
E-mail: <input type="text" name="email"><br>
<input type="submit">
</form>
</body>
</html>
If GET is used for reading the data let's say "name" then following is understandable:
welcome.php
<html>
<body>
Welcome <?php echo $_GET["name"]; ?><br>
Your email address is: <?php echo $_GET["email"]; ?>
</body>
</html>
When POST is meant for writing the data How is it possible to read the "name" using POST? Why should the following work?
<html>
<body>
Welcome <?php echo $_POST["name"]; ?><br>
Your email address is: <?php echo $_POST["email"]; ?>
</body>
</html>
First of all add a name in your submit input <input name="submit" type="submit">
Second into welcome.php add if(isset($_GET["submit"])){ $submit = preg_replace('#[^a-z0-9]#i', '', $_GET['submit']); }
and then use Welcome <?php echo $submit; ?>
i suggest to use preg_replace if you want to pass values from page to page
I am just starting to learn php and when I run my php file, no matter the browser, i get a 404 error. What is my code missing that is causing this? This file is supposed to display a message after a user submits a 'contact me' form.
<!DOCTYPE html>
<html lang="">
<head>
<title>Contact Form Submitted</title>
</head>
<body>
<form action="<?php echo $_SERVER['PHP_SELF']; ?>" method="POST">
<p>
Thank you, <?php echo $_POST["name"]; ?> for your comments<br>
You stated in your test Message:<br>
<?php echo $_POST["message"]; ?>
We will respond to you at <?php echo $_POST["email"]; ?> when we make updates to the site.
</p>
</body>
</html>
this code works. see this is firefox: https://i.imgur.com/YeBFt9B.png
<?php
// var // variable value // default value
$php_path = $_SERVER['PHP_SELF'] ?? "";
$name = $_POST["name"] ?? "name";
$message = $_POST["message"] ?? "message";
$email = $_POST["email"] ?? "email";
?>
<!DOCTYPE html>
<html lang="">
<head>
<title>Contact Form Submitted</title>
</head>
<body>
<form action="<?= $php_path ?>" method="POST">
<p>
Thank you, <?= $name ?> for your comments<br>
You stated in your test Message:<br>
<?= $message ?>
<br><br>
We will respond to you at <?= $email ?> when we make updates to the site.
</p>
</form>
</body>
</html>
if you don't specify a default value on your parameters from another form you could run into an unexpected error. This version is better ;)
I'm sure you get this error because you have a typo in one of your urls
First of all use htmlspecialchars in:
<form method="post" action="<?php echo htmlspecialchars($_SERVER["PHP_SELF"]);?>">
you prevent XSS attack if user enter url like: http://www.example.com/test_form.php/%22%3E%3Cscript%3Ealert('hacked')%3C/script%3E
If you are getting 404 error it's probably becouse your action of the form on contact me page don't point to right script.
If you have two separate files, one for form and second for thanks message you have to make sure than the urls are correct.
// form.php
...
<form action="thanks-message.php">
...
</form>
...
// thanks-message.php
<?php
$name = $_POST["name"] ?? "Joe";
$message = $_POST["message"] ?? "Lorem ipsum...";
$email = $_POST["email"] ?? "joe#example.com";
?>
...
<p>
Thank you, <?= $name ?> for your comments<br>
You stated in your test Message:<br>
<?= $message ?>
<br><br>
We will respond to you at <?= $email ?> when we make updates to the site.
</p>
...
form element is not necessary on this page
I tried to execute the following html code:
<html>
<head>
<title>Listing 9.1 A simple HTML form</title>
</head>
<body>
<form action="listing.php" method="POST">
<p><strong>Name:</strong><br>
<input type="text" name="user"></p>
<p><strong>Address:</strong><br>
<textarea name="address" rows="5" cols="40"></textarea></p>
<p><input type="submit" value="send"></p>
</form>
</body>
</html>
And this is the code of the associated php file (listing.php):
<html>
<head>
<title>Listing Reading input from a form </title>
</head>
<body>
Welcome <?php echo $_POST["user"]; ?><br>
Your email address is: <?php echo $_POST["address"]; ?>
</body>
</html>
I was able to get the form and enter values as shown below:
Form Input
But, when I clicked 'Send Message', it displays only:
Welcome
Your email address is:
Without the values that I entered through the form.
When I tried to run the php file directly from the local host (http://localhost/listing.php), I received these error messages:
Welcome
Notice: Undefined index: user in C:\xampp\htdocs\listing.php on line 7
Your email address is:
Notice: Undefined index: address in C:\xampp\htdocs\listing.php on line 8
I even modified the php code as follows, but still got the same output:
<html>
<head>
<title>Listing Reading input from a form </title>
</head>
<body>
Welcome <?php
if(isset($_POST['submit'];)) {
session_start();
$user = $_POST['user'];
echo "$text";}else {echo 'Could not load text!';}?><br>
Your email address is: <?php echo $_POST["address"]; ?>
</body>
</html>
I would really appreciate it if you could give some advice to make it work.
Thanks
if(isset($_POST['submit'];)) should be changed,so you check if address and user is isset. Furthermore you normally don't want ; in your if statements.
Here i have a optimized version for you. the !empty is added so we also check if the inputs are not empty.
if (isset($_POST["name"] && isset($_POST["address"])) {
if (!empty($_POST["name"] && !empty($_POST["address"]) {
// execute code as u would
}
}
Notice: Undefined index: address in C:\xampp\htdocs\listing.php on line 8
This is caused by the use of the ';' in the if condition.
Remove that and you should be good. for now.
Try this code:
<html>
<head>
<title>Listing Reading input from a form </title>
</head>
<body>
Welcome <?php
if(isset($_POST['submit']))
{
session_start();
$user = $_POST['user'];
echo $user;
echo "<br><br>Your Email Address is: ".$_POST['address'];
}
else
{
echo 'Could not load text!';
}
?>
<br>
<form action="" method="POST">
<p><strong>Name:</strong><br>
<input type="text" name="user"></p>
<p><strong>Address:</strong><br>
<textarea name="address" rows="5" cols="40"></textarea></p>
<p><input type="submit" value="send" name="submit"></p>
</form>
</body>
</html>
In your second code block $text isn't defined anywhere. Do you mean to have $user?
<html>
<head>
<title>Listing Reading input from a form</title>
</head>
<body>
Welcome
<?php
if(isset($_POST['submit'])) {
session_start();
echo isset($_POST['user']) ? $_POST['user'] : "User";
} else {
echo "User";
}
?>
<br>
Your email address is:
<?php
echo isset($_POST["address"]) ? $_POST["address"] : "Address"
?>
</body>
</html>
Try this and let me know:
<?php
session_start();
if(isset($_POST['submit'])) {
$user = $_POST['user'];
echo "Welcome ".$user;
echo "<br>";
echo "Your email address is: ".$_POST["address"];
}else {
// you may get rid of this block if you like
echo 'Could not load text!';
}
?>
<html>
<head>
<title>Listing 9.1 A simple HTML form</title>
</head>
<body>
<form action="" method="POST">
<p><strong>Name:</strong><br>
<input type="text" name="user"></p>
<p><strong>Address:</strong><br>
<textarea name="address" rows="5" cols="40"></textarea></p>
<p><input type="submit" name='submit' value="send"></p>
</form>
</body>
</html>
Here i entered name nd email id but when i click on submit button my entered information is blank like below image.
In PHP clicking on the submit button doesn't print the information. I used $GET and $POST, both are not working.
<!DOCTYPE HTML>
<html>
<body>
<form action="php_forms.php" method="post">
Name: <input type="text" name="name"><br>
Email: <input type="text" name="email"><br>
<input type="submit">
</form>
</body>
</html>
<html>
<body>
Welcome <?php echo $_POST["name"]; ?><br>
Your email address is: <?php echo $_POST["email"]; ?>
</body>
</html>
It should be work.Change your action (php_forms.php) file code.I have tried in my server.Hope it will be helped.
<html>
<body>
Welcome <?php echo htmlspecialchars($_POST["name"]); ?><br>
Your email address is: <?php echo htmlspecialchars($_POST["email"]); ?>
</body>
</html>
Read More dealing with html forms in PHP.NET.
Your form uses get method and php_forms.php uses post method. Try
<form action="php_forms.php" method="post">
On one PHP server I have two files. One file (the name is "first.php") contains this code:
<html>
<head>
<title>First Page</title>
</head>
<body>
Please enter your password and age:
<form action="pass.php" method="post">
Name: <input type="text" name="fname" />
Age: <input type="text" name="age" />
<input type="submit" />
</form>
</body>
</html>
The other file ("pass.php") contains this code:
<html>
<head>
<title>Secon Page</title>
</head>
<body>
<?php
if ($fname=="Jack")
echo "You are Jack!";
else
echo "You are not Jack!";
?>
</body>
</html>
As far as I understand, if a user enters "Jack" in the first page, than the second page should be displayed with "You are Jack!" line, but it doesn't happen. Why is it so?
On your second page, instead of checking for $fname, check for $_POST['fname'] instead. I think that is all you are missing.
You probably don't have register_globals set. This is depreciated and will be removed in 6.x. So for good programming you should instead of $fname try $_POST['fname'] on your second page.
pass.php needs to look like this
<html>
<head>
<title>Secon Page</title>
</head>
<body>
<?php
if ($_POST['fname'] =="Jack")
echo "You are Jack!";
else
echo "You are not Jack!";
?>
</body>
</html>
It might help to set the post values as variables and work with that. Something like this:
foreach($_POST as $key => $value)
{
$$key = $value;
}
Then whatever is posted will be available rather than using $_POST['xxxxx'] in your logic.