# PHP: if checkbox checked

**URL:** <https://forum.kirupa.com/t/php-if-checkbox-checked/298790>\
**Category:** Uncategorized\
**Created:** [October 25, 2009, 9:35am UTC](https://forum.kirupa.com/t/php-if-checkbox-checked/298790 "2009-10-25T09:35:43Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![speedy\_rudolf](https://avatars.discourse-cdn.com/v4/letter/s/5daacb/32.png) [@speedy\_rudolf](https://forum.kirupa.com/u/speedy_rudolf)\
**Post date:** [October 25, 2009, 9:35am UTC](https://forum.kirupa.com/t/php-if-checkbox-checked/298790/1 "2009-10-25T09:35:43Z")

</div>

Hi. I’m making a website that includes a form, and I kind of hit a bump with the php.

```auto
**PHP:**
{for($i=0; $i<22; $i++)
    {if($_POST["Navs".$i]=='ON')
     {$message.=$i.", ";}}
 
**HTML:**
<tr><td width="425"><input type="checkbox" id="Navs0" onClick="Cont_pag5_3()"><img name="But_nav" src="buttons/a_la_carte_p1.jpg" onMouseOver="Nav_but(0, 0)" onMouseOut="Nav_but(1, 0)" onMouseDown="Nav_but(2, 0)" onMouseUp="Nav_but(0, 0)"></td>
<td width="425"><input type="checkbox" id="Navs1" onClick="Cont_pag5_3()"><img name="But_nav" src="buttons/artemis_p1.jpg" onMouseOver="Nav_but(0, 1)" onMouseOut="Nav_but(1, 1)" onMouseDown="Nav_but(2, 1)" onMouseUp="Nav_but(0, 1)"></td></tr>
<tr><td width="425"><input type="checkbox" id="Navs2" onClick="Cont_pag5_3()"><img name="But_nav" src="buttons/aura_p1.jpg" onMouseOver="Nav_but(0, 2)" onMouseOut="Nav_but(1, 2)" onMouseDown="Nav_but(2, 2)" onMouseUp="Nav_but(0, 2)"></td>
<td width="425"><input type="checkbox" id="Navs3" onClick="Cont_pag5_3()"><img name="But_nav" src="buttons/avail_p1.jpg" onMouseOver="Nav_but(0, 3)" onMouseOut="Nav_but(1, 3)" onMouseDown="Nav_but(2, 3)" onMouseUp="Nav_but(0, 3)"></td></tr>
ETC to Navs21

```

The problem is that the php doesn’t “see” if the checkboxes ar checked or not, so that part of $message remains empty…What am I doing wrong? Thank you in advance. Bye.