[RESOLVED] Help with hidden values

boorama

Hi all,

Can any one help me in using hidden values with a form that posts to it self

the form has 2 fields one of them is selection from options I want the values of the fields to be there once the form is posted to it self.

I have tried to use the following with the form, but it didn't work.

<?php
foreach($HTTP_POST_VARS as $name=>$value)
{

  echo "<input type ='hidden' value='".$value."' name='".$name."'";

}

here is the complete code for the form, please help

<form action= '<?php echo($PHP_SELF); ?>' method='POST' name='bf'>
<p> </p>

<table width='50%' border='0' align='center'cellpadding='4' cellspacing='0'>
<tr>
<td width='29%'><font face='Copperplate Gothic Light'>NHS Number</font></td>
<td width='68%'><input name='nhs' type='text' id='nhs'></td>
</tr>
<tr>
<td><font face='Copperplate Gothic Light'>Select hospital</font></td>
<td><select name='hosp'>
<option></option>
<option value='Hammersmith Hospital'>Hammersmith Hospital</option>
<option value='Charing Cross Hospital'>Charing Cross Hospital</option>
<option value='Selly Oak Hospital'>Selly Oak Hospital</option>
</select></td>
</tr>
<tr>
<td><font face='Copperplate Gothic Light'>find appointment</font></td>
<td><input type='submit' name="fapp" value='GO'></td>
</tr>
</table>

<?php
foreach($HTTP_POST_VARS as $name=>$value)
{

  echo "<input type ='hidden' value='".$value."' name='".$name."'";

}

?>
</form>

vertmonkee

Having a quick glance at it you havent closed your input tag in the foreach loop

boorama

Thanks vertmonkee,

I have closed the input tag, but still it does not work.

also I have tried the following but still cant get it right.

<?php

$name;
$value;

while (list($name, $value) = each($HTTP_POST_VARS))

{
echo "<input type=\"hidden\" value=\"$value\" name=\"$name\">\n";
}

vertmonkee

This foreach loop worked for me

Give it a try

foreach($HTTP_POST_VARS as $name => $value)
{

echo "<input type='hidden' name='".$name."' value='".$value."'>";	

}

Also as you probably don't want the Var with Go in it you could stick an if statement in

foreach($HTTP_POST_VARS as $name => $value)
{
	if($name != "fapp") {

echo "<input type='hidden' name='".$name."' value='".$value."'>";

}


}

boorama

Thanks a lot for your help agian vertmonkee,

I have tried both of them and still no luck.

In fact if a place that code and sumbit the form the query does not give any
result. If I take it off I get the results but no values are passed once the form is

posted to it self.

I wonder if the place I am putting the code is correct.

From what I know I can place the code between <form> and </form>

thanks for your help really appricate it.

vertmonkee

Hi Boorama,

Here is the complete code that I used to test it

<html>
<head>
<title>PHP Builder Test</title>
</head>
<body>
<form action= '<?php echo($PHP_SELF); ?>' method='POST' name='bf'>
<p>&nbsp;</p>

<table width='50%' border='0' align='center'cellpadding='4' cellspacing='0'>
<tr>
<td width='29%'><font face='Copperplate Gothic Light'>NHS Number</font></td>
<td width='68%'><input name='nhs' type='text' id='nhs'></td>
</tr>
<tr>
<td><font face='Copperplate Gothic Light'>Select hospital</font></td>
<td><select name='hosp'>
<option></option>
<option value='Hammersmith Hospital'>Hammersmith Hospital</option>
<option value='Charing Cross Hospital'>Charing Cross Hospital</option>
<option value='Selly Oak Hospital'>Selly Oak Hospital</option>
</select></td>
</tr>
<tr>
<td><font face='Copperplate Gothic Light'>find appointment</font></td>
<td><input type='submit' name="fapp" value='GO'></td>
</tr>
</table>


<?php

foreach($HTTP_POST_VARS as $name=>$value)
{
	if($name != "fapp") {

echo "<input type='text' name='".$name."' value='".$value."'><br>";

}


}
?>

</form>
</body>
</html>

boorama

Thank you very much vertmonkee,

The values get posted now.

I changed if($name != "fapp") to if($name = "fapp")

because of my other code which get exceuted once the form is submitted.

one last thing, how do I keep the input on the feilds once they have been submitted

I want them to appear in the feilds. for example the selected hospital to be there once the form is posted.

thank, really appricate your help 🙂

mykg4orce

instead of using <?php echo($PHP_SELF); ?>

just put a question mark in the action

action="?"

or if you must use php_self then use this instead.

$_SERVER['PHP_SELF']

dont know what version of PHP you're running...

mykg4orce

upon successfuly meeting requirements for validating that input from the user get the name of the fields you want NOT to disappear once the page refreshes.

$_SESSION['fieldIwantToKeep'] = $theFieldNameFromPostVar;

then on your form

if (isset($SESSION['fieldIwantToKeep'])) {
<input type=text name=fieldIwantToKeep value=$SESSION['fieldIwantToKeep']/>
} else {
<input type=text name=fieldIwantToKeep />
}

boorama

Hi mykg4orce,

Thank a lot for your help.

I am using PHP 5. using $_SERVER['PHP_SELF'], does not make any difference.

I tryed the sessions, but still cant get it right the feild displays

$_SESSION['feildwant to keep] instead of the actual value.

this is what I've don.

after validation:

$_SESSION['nhs'] = $_POST['nhs'];

then in the form:

<?php   if (isset($_SESSION['nhs'])) {?>

<td width='68%'><input name='nhs' type='text' value='$_SESSION['nhs']' /></td>

<?php
} else {?>

<td width='68%'><input name='nhs' type='text' </td>
<?php
}
?>

mykg4orce

this:
<td width='68%'><input name='nhs' type='text' value='$_SESSION['nhs']' /></td>

needs to look like this:
<td width='68%'><input name='nhs' type='text' value='<?php echo $_SESSION['nhs']; ?>' /></td>

See the difference? 🙂

boorama

Thanks a lot mykg4orce,

It does make a difference.

really appreciate your help.