PHP Dynamic Checkboxes

By Jamsi • Feb 7th, 2006 • Category: PHP

I noticed the lack of tutorials or articles when using checkboxes in a dynamic form, so I thought I’d post some code I used recently to manage deleting rows. The thing most people forget isthat the checkbox field name has to have a [] on the end as this tells PHP to use an array and not a normal variable to hold the information.
PHP

1
2
3
4
5
6

if ($_REQUEST["btnDelete"])
{
	foreach ($_REQUEST["chkDelete"] as $value) {
	     echo $value;
        }
}

HTML

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19

<form action="yourfile.php" method="post" name="form1">
<table width="70%" border="0" cellpadding="2" cellspacing="2">
<tr>
    <td width=5%></td>d>
    <td>Username</td>
</tr>
<?php
$result = mysql_query("select * from TABLE");
while ($row = mysql_fetch_array($result))
{
	echo "<tr>";
	echo "	<td><input type=checkbox value=".$row[userid]." name=chkDelete[]></td>";
	echo "	<td>".$row[username]."</td>";
	echo "</tr>";
}
?>
</table>
<input type="submit" value="Delete Selected" name="btnDelete">
</form>

No related posts.


FREE NEWSLETTER -> Want Tech Tips Sent Straight to your Inbox?

Grab our Newsletter to Ensure your PC is Running Smooth!

Tagged as: , ,

Jamsi is currently studying a full time Bachelor of Computer/Business degree and working part time as an Internet Security Consultant.
Email this author | All posts by Jamsi

4 Responses »

  1. E on March 3rd, 2006 at 9:12 am:

    Thanks.
    It worked like this for me

    if ($_REQUEST["chkDelete"])
    {
    foreach ($_REQUEST["chkDelete"] as $value)
    {
    echo $value;
    }
    }

  2. Jamsi on March 4th, 2006 at 2:57 pm:

    Whoops, thanks! Forgot a bracket :)

  3. Dodger on August 18th, 2008 at 4:03 pm:

    Help me please!

    What table structure i must have?

    I have:

    `userid` varchar(255) NOT NULL,
    `username` varchar(255) NOT NULL,
    `visable` tinyint(1) NOT NULL default ‘1′,

    and trying (my lines 28,29):

    echo ” “;
    echo ” “.$row[username].”";

    and having next error”

    Notice: Use of undefined constant visable - assumed ‘userid’ in C:\Program Files\Apache Software Foundation\Apache2.2\htdocs\test-check-add.php on line 28

    Notice: Use of undefined constant username - assumed ‘username’ in C:\Program Files\Apache Software Foundation\Apache2.2\htdocs\test-check-add.php on line 29

    I whant to change visable value from 1 to 0 if checkbox is not checked. Plz, help, i am newbie…

  4. Online Casino on September 25th, 2008 at 4:58 pm:

    Best places to play, best strategies to win. Player ratings & reviews of top online casinos & pokers with highest payouts & biggest bonuses.

Leave a Reply