checkbox initialization via function

marco_fj

Hello,

I'm having a problem with the initialization of 'checked' checkboxes.

Basically it looks like (I'm generating the lines of code for the checkboxes via a function):
<form name=formname action=<?php echo $PHP_SELF?>>
<input type=checkbox name=checkboxname1 value=1 checked>
<input type=checkbox name=checkboxname2 value=1>
</form>

With help of the Javascript OnClick function the form loads again ($PHP_SELF). The problem is that when clicking on the 1st checkbox $checkboxname1 (and as expected $checkboxname2) do not have a value. When clicking on the 2nd checkbox $checkboxname1 and (as expected) $checkboxname2 become 'on' or 1.

Note: I think, though am not sure, that the initial 'hard coded' checked causes the problem. When all checkboxes are initially off, everything works fine.

How can I solve this?

Thanks!

Anon

What you say is exactly true. Every time the page loads, checkboxname1 is checked, exactly as it says in the HTML.

What you want is to have all the "checked" attributes for your checkboxes filled in by PHP, so that when the page loads all the checkboxes that should be checked have "checked" written in their tag, and all those that don't, don't.

<input type="checkbox" name="checkboxname1" <?php if(checkboxname1 should be checked){echo "checked";}?> value="1">

marco_fj

Thanks. That works indeed, but my approach is a little different, so I do not yet see how I can do it the way you describe.

My approach is as follows:

1.) create object containing checkboxes (and others)
the object has the following variables
$name1 (=value of checkbox 1 or 0)
$name1inputtype (=checkbox)
$name2 (=value of checkbox 1 or 0)
$name2inputtype (=checkbox)
etc
the initial values are set in the constructor

2) for allnames (i.e. name1 name2 etc) {
display_object_characteristic($object,$namek,$namekinputtype,$line);
echo $line;

function display_object_characteristic(&$object,&$namek,&$namekinputtype,&$line)
{
if ($$namek) {
$object->set_option($namek,$$namek); // sets this->namek=$$namek
}
else // can actually be done after next statement as well
{
$checkedval=$object->get_option($namek); // gets this->namek

$object->set_option($namek, $checkedval); // sets this->namek=$$namek
}

$checkedval=$object->get_option($namek);
$value="1";
$namekinputtype($namek,$value,$checkedval); // equivalent to checkbox($namek,$value,$checkedval,$line);
}

checkbox($namek,$value,$checkedval,&$line)
{
line="<name=\"$namek\" value=\"$value\ "
line.="OnClick=\this.form.submit\ " //can't remind the exact code but this works (Javascript)
if ($checkedval==1)
{
line.=" checked";
}
line.=">";
}

I hope this pseudo code is clear, if not let me know, then I can give you my exact (stripped) code. My basic problem is the 'hard coded checked' by doing it this way. Can I make it dynamic, without losing the 2 (sub)functions. I wat to keep them because I want to do more or less the same with other form input types.