CODEWITHSUNDEEP
php
0xSina
0xSina

Reputation: 21573

php empty page when using $_REQUEST

I just got started with php. I have a form in a web page that directs to handle.php, like this:

<form action = "handle.php" method="post">
    <p><b>name:</b> <input type = "text" name = "name" size="20"/><p>
    <input type="submit" name="submit" value="submit my info">
</form>

In my handle.php, this is what I have:

<!DOCTYPE HTML>
<html>
    <head>
        <title> Hello! </title>
    </head>
    <body>
        <?php
        echo "<p>Name: $_REQUEST['name']<p>";
        ?>
        <p> Hi</p>
    </body>
</html>

This page appears completely empty. Interestingly, if I remove $_REQUEST['name'], then everything is fine. Seems to me that calling $_REQUEST makes the page empty (i check the source code and theres nothing there).

What am I doing wrong? thanks.

Upvotes: 2

Views: 1135

Answers (10)

Cyclonecode
Cyclonecode

Reputation: 30071

echo "<p>Name: $_REQUEST[name]<p>";

Upvotes: 1

Gustav Bertram
Gustav Bertram

Reputation: 14905

You should change your code to this:

echo "<p>Name: {$_REQUEST['name']}<p>";

You should take a look at the "complex curly syntax" section on the PHP Manual string page.

And you should read how to enable error reporting.

Upvotes: 2

Polynomial
Polynomial

Reputation: 28326

Repost of my previous answer, with the incorrect bit removed

You didn't wrap the value in {} properly.

<!DOCTYPE HTML>

<html>
    <head>
        <title> Hello! </title>
    </head>

    <body>

        <?php
        echo "<p>Name: {$_REQUEST['name']}<p>";
        ?>

        <p> Hi</p>
    </body>

</html>

You should also not use $_REQUEST, but rather $_GET and $_POST. It's generally a bad idea to get into the habit of using $_REQUEST because it can open up CSRF (Cross-Site Request Forgery) attacks.

I would also suggest wrapping your user variable in htmlspecialchars to prevent them from being able to inject HTML or script into your page:

    <?php
    $name = htmlspecialchars($_REQUEST['name']);
    echo "<p>Name: {$name}<p>";
    ?>

Upvotes: 0

Aldo Stracquadanio
Aldo Stracquadanio

Reputation: 6237

What is probably happening is that you get a fatal error but the configuration of your php.ini in the section error_reporting just ignore it, this is why you get a white page. Change it to E_ALL or something like that to have an easier development!

Once you have an explicit error, if it is not still solved, post it here.

Upvotes: 1

liquorvicar
liquorvicar

Reputation: 6106

I would guess your script is throwing a syntax error.

Try replacing this line

echo "<p>Name: $_REQUEST['name']<p>";

with

echo "<p>Name: {$_REQUEST['name']}<p>";

See the manual for echo for info on how single- and double-quoted strings work.

In general, it's often a good idea on development sites to enable error reporting so the page displays errors like this rather than just "throwing a whitey". Make sure if you do, that displaying errors is disabled on production sites (although you might want to log errors still).

Upvotes: 1

user1048311
user1048311

Reputation:

If you want to echo an array-variable you need to kind of "escape" it like so:

<?php
    echo "<p>Name: {$_REQUEST['name']}<p>";
?>

Another solution is this:

<?php
    echo '<p>Name: '.$_REQUEST['name'].'<p>';
?>

Look up the diffrences between strings with ' and strings with "

Upvotes: 1

Peter
Peter

Reputation: 16943

Proper syntax:

echo "<p>Name: ".$_REQUEST['name']."<p>";

or

echo "<p>Name: {$_REQUEST['name']}<p>";

I really recommend you to read this documentation:

Upvotes: 3

fonini
fonini

Reputation: 3351

Try with this:

echo "<p>Name: " . $_REQUEST['name'] . "<p>";

You may also enable the error report in order to avoid situations like this. You can do this in the php.ini file or at the top of you PHP page: error_reporting(-1).

http://php.net/manual/en/function.error-reporting.php

Upvotes: 5

Sonal Khunt
Sonal Khunt

Reputation: 1894

replace this 
echo "<p>Name: $_REQUEST['name']<p>";

to 

echo "<p>Name: $_REQUEST[name]<p>";

Upvotes: -5

Kokos
Kokos

Reputation: 9121

You have error reporting off and you are receiving a fatal error, which is why you are not seeing anything. Inline variables can't be used the way you do it so try replacing your echo with this:

echo "<p>Name: ".$_REQUEST['name']."<p>";

or this:

echo "<p>Name: {$_REQUEST['name']}<p>";

Upvotes: 4

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