Jump to content

Disappearing values


w3sl3y2003

Recommended Posts

Hi all,

I'm having a problem with self-processing forms (forms that have action=$PHP_SELF) losing their values. What i do is store the values of certain variables in hidden fields. I give the hidden fields the same name as the variables. But as soon as i submit the form, i check the source after the page has been rendered and i see that the values in the hidden fields have disappeared.

Eg.
[b]Before submit[/b]
<form method="POST" action="/app_ed/frmUpdate.php">
<input type="hidden" name="strNewText" value=" This is a test message on the dev webserver ">
<input type="hidden" name="strOldText" value=" This is a test message ">
<input type="submit" name="btnUpdateSubmit" value="Submit" value='Yes/No' onclick='return confirm("Are you satisfied with the new message?");'>
</form>

[b]After submit[/b]
<form method="POST" action="/app_ed/frmUpdate.php">
<input type="hidden" name="strNewText" value="  ">
<input type="hidden" name="strOldText" value="  ">
<input type="submit" name="btnUpdateSubmit" value="Submit" value='Yes/No' onclick='return confirm("Are you satisfied with the new message?");'>
</form>


What could've caused the values to disappear?
Link to comment
Share on other sites

okay HuggieBear,

[b]frmSubmit.php[/b]

[code]<html>
<head>
<title>Applet Text Editor</title>
</head>
<body>
<form action="frmUpdate.php" method="POST">
<?php
$preview_file = "scroller/preview_scroller.txt";
$handle = fopen($preview_file, 'r');
$MAX_DATA = 500; //READ IN 500 BYTES OF DATA
$total_data = '';

if(file_exists($preview_file))
{
while($data = fread($handle,$MAX_DATA))
{

$total_data = $total_data. $data; //APPEND INPUT
}

echo "<input type=\"hidden\" name=\"current_scroller_text\" value=\"" .
$total_data .
"\">";

echo "<textarea name=\"txtScrollerText\" rows=8 cols=60>".
    $total_data .
    "</textarea>";

fclose($handle);

}
?>

<br>
<input type="submit" name="btnSubmit" value="submit">
<br>
</form>
</body>
</html>[/code]

[b]frmUpdate.php[/b]

[code]<?php
if(isset($_POST['btnUpdateSubmit']))
{
//header("Location: frmSubmit.php");
//should write "old" text back into preview file
if('return confirm("Are you satisfied with the new message?");')
{
                //        $txtScrollerText = $_POST['txtScrollerText'];
// print("strScrollerText = ".$strScrollerText);
        $production_file = "../scroller/scroller.txt";        
        $prod_handle = fopen($production_file, 'w');
        fwrite($prod_handle,$strScrollerText);
        fclose($prod_handle);

header("Location: frmSubmit.php");
}
else
{
// $current_scroller_text = $_POST['current_scroller_text'];
$preview_file = "scroller/preview_scroller.txt";
$preview_handle = fopen($preview_file, 'w');
fwrite($preview_handle,$strOldPreviewText);
fclose($preview_handle);

header("Location: frmSubmit.php");
}
}
else
{
$strScrollerText = $_POST['txtScrollerText'];
$strOldPreviewText = $_POST['current_scroller_text'];
// print("current_scroller_text : " . $strScrollerText);

$preview_file = "scroller/preview_scroller.txt";
$preview_handle = fopen($preview_file, 'w');
fwrite($preview_handle,$strScrollerText);
fclose($preview_handle);


}

?>
<html>
<body>

<!-- process data stored in variable -->

<form method="POST" action="<? print $_SERVER['PHP_SELF']?>">
<input type="text" name="strScrollerText" value=" <?php print $strScrollerText ?> ">
<input type="text" name="strOldPreviewText" value=" <?php print $strOldPreviewText ?> ">
<input type="submit" name="btnUpdateSubmit" value="Submit" value='Yes/No' onclick='return

confirm("Are you satisfied with the new message?");'>

</form>
</body>
</html>[/code]

[b]Please use the code tags when posting code to the forum.[/b]
Link to comment
Share on other sites

This thread is more than a year old. Please don't revive it unless you have something important to add.

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Restore formatting

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.