PHP post checkbox problem

Question

i have a form that utilizes checkboxes.

<input type="checkbox" name="check[]" value="notsure"> Not Sure, Please help me determine <br /> <input type="checkbox" name="check[]" value="keyboard"> Keyboard <br /> <input type="checkbox" name="check[]" value="touchscreen"> Touch Screen Monitors <br /> <input type="checkbox" name="check[]" value="scales">Scales <br /> <input type="checkbox" name="check[]" value="wireless">Wireless Devices <br />

And here is the code that process this form in a external php file.

$addequip = implode(', ', $_POST['check']);

I keep getting this error below;

<b>Warning</b>:  implode() [<a href='function.implode'>function.implode</a>]: Invalid arguments passed in <b>.../process.php</b> on line <b>53</b><br />
OK

Answer 1

the following site seems to be what you need:

http://www.ozzu.com/programming-forum/desperate-gettin-checkbox-values-post-php-t28756.html

Answer 2

is any of your checkboxes ticked? php’s $_POST array will only have checkboxes which have been ticked

to silence your warning use this:

$addequip = implode(', ', empty($_POST['check']) ? array() : $_POST['check'] );

Answer 3

Hi I m the original user who posted this question i couldnt login to my account so posting from another account. After couple hours of trying i somehow managed to make it work partially. Below is the modified form html and process code for checkboxes

<input type="checkbox" name="check" value="Touchscreen"> Touchscreen<br>
<input type="checkbox" name="check" value="Keyboard"> Keyboard<br>
<input type="checkbox" name="check" value="Scales"> Scales<br>

I had to remove the [] so it would work. Also below is the entire post method for those would like to see. It works perfectly fine with every other field.

<form id="contact_form" action="process.php" method="POST" onSubmit="return processForm()">

And below is the php code to process checkboxes. For some reason i have to tell script that $_POST['check'] is an array without it would only return array. All other methods suggested returns invalid argument passed error.

$chckbox = array($_POST['check']);
          if(is_array($chckbox))
       {
         foreach($chckbox as $addequip) {
         $chckbox .="$addequip\n";
         }
       }

So this code works but returns only 1 checkbox value that is ticked even no matter how many you ticked.