[Resolved] Checkboxes Make sure one is checked

hazmatt

I am trying to force visitors to select a date when they place a bid. I have taken over the programming and am new to PHP.

I do not want a visitor to be able to progress past the detail screen without selecting one of the dates. Is there a way to have PHP check to see if a check box has been selected and if one has not to inform the user to select a date? I am sure there is I just don't know how to. Any help would be greatly appreciated.

Here is some of the script that I am working on.

<form action="./" method="post">
<input type="hidden" name="page" value="job_bid">
<input type="hidden" name="sub" value="form">
<input type="hidden" name="id" value="<?php echo $id; ?>">
...
echo "<tr>
<td align=\"right\"><input type=\"checkbox\" name=\"jobdatetime[]\" value=\"$td\"></td>
<td align=\"center\" bgcolor=\"#ddddff\">$tdw $td</td>
<td align=\"center\" bgcolor=\"#eeeeee\"><b>$tt</b></td>
</tr>";

I can send or post the whole code if it is neccessary but I didn't want to make this a confusing mess.

Thank you in advance.

Weedpacket

You could look to see if count($_POST['jobdatetime']) is nonzero (or set, for that matter).

This would also be doable in Javascript, and would allow you to keep the person on the page until they have checked a box (I forget the exact syntax, though - should be plenty of Javascript resources that cover this). However, you will still need to make the above check (and redisplay the detail screen if the test fails) in case the user has bypassed the Javascript check in some fashion.

hazmatt

Where would I "look to see if count($_POST['jobdatetime']) is nonzero (or set, for that matter)."

jimson

first, get a Php manual from www.php.net

read about the function count() or its alias sizeof()

there is example code inside there.

hazmatt

I have reviewed the PHP manual and have made some changes. For some reason everytime I count the variable result it returns a 0

$num_dates_bid = count($POST['jobdatetime']);
echo "You clicked $num_dates_bid dates to bid on.";

No matter how many checkboxes I select it always returns a 0

jimson

kind to show me your HTML
checkboxes code... 🙂

Weedpacket

Originally posted by hazmatt
$num_dates_bid = count($POST['jobdatetime']);
echo "You clicked $num_dates_bid dates to bid on.";

No matter how many checkboxes I select it always returns a 0

You don't mean $_POST['jobdatetime'], do you?

hazmatt

Thank you for your help. I forgot the underscore after POST and of course it made all the difference.