Read data from Environment Variable

[Anon]

Hello, I've used post method for a form request. I understand that the data will be stored in the standard input device (STDIN) and its total length can be determined by the CONTENT_LENGTH environment variable. I wonder how can I retrieve the data from these environment variables by using PHP ?

Thanks !!

[Anon]

You use same field name as you used in your form... let me show...

<FORM NAME=\"Form\" METHOD=POST ACTION=\"wrk.php\">
<INPUT NAME=\"zipcode\" TYPE=\"TEXT\">

...bla, bla...

In wrk.php you just use $zipcode
It automatically has data from the zipcode field of the form.

Easy isnt it?

bbBear wrote:

Hello, I\'ve used post method for a form request. I understand that the data will be stored in the standard input device (STDIN) and its total length can be determined by the CONTENT_LENGTH environment variable. I wonder how can I retrieve the data from these environment variables by using PHP ?

Thanks !!

[Anon]

Thanks for the clearing my doubts =)

I have another question,

If the script is calling itself like

<FORM NAME=\"Form\" METHOD=POST ACTION=\"$PHP_SELF\">

How to capture the data then ?

[Anon]

ahh forgot.. then use

strlen($zipcode)

...to get strings length 🙂

L.

[Anon]

If you don't mind, can you please elaborate more on the usage of strlen ? I have been trying to think of how to apply but unfortunately, my mind still stuck, oops?!

[Anon]

One solution that I think of is to use hidden tag. In this way, the value will not gone even the script calling itself. Do you think it is efficient ? Is there any way to do it ?

[Anon]

That's easy, too:

if ($REQUEST_METHOD == 'POST')
{
// process the variables posted by the form
}
else
{
// generate the form, including the statement to POST back to ourselves
}

Actually, quite often I find myself wanting to do data validation on the form,
and not wanting to depend on the users having Javascript enabled, I do it
in PHP. As a very scaled-down example:

<?php
function build_form()
{
global $PHP_SELF, $name, $pwd;

echo "<form action=\"$PHP_SELF\" method=\"POST\">\n";
echo "Name: <input type=\"text\" name=\"_name\" value=\"$_name\"><br>\n";
echo "Password: <input type=\"password\" name=\"_pwd\"><br>\n";
echo "<input type="submit" value=\"Log In\">\n";
echo "</form>\n";
}

if ($REQUEST_METHOD != 'POST')
{
build_form();
}
elseif ($name == '' )
{
echo "Please enter your Login Name<br>";
build_form();
}
elseif ($pwd == '' )
{
echo "Please enter your password<br>";
build_form();
}
else
{
// do something with $name and $pwd
}

?>

[Anon]

Its simple...

$text="AVID Systems Presents";
$length=strlen($text);
echo ($length);

// This program will print 21 because that is exactly the length of string stored in $text including spaces. It starts counting with 1.