Cannot retrieve the checkbox status - php

Question

I have a table with some checkboxes in every row. There is a select element in the table footer with several options. When the user chooses an option, i want to pass the value of any checked checkboxes and the selected option to a php script.
This is the form:
<form name="doall" method="POST" action="action.php">
<table>
<tbody>
<?php for($j=0;$j<count($userToRead);$j++){ ?>
<tr>
<td>
<input type="checkbox" id="selection_<?php echo $j ?>" name="objectSelected[<?php echo $userToRead[$j]['id'] ?>]" value="1"/>
</td>
<td align="center">
<?php echo $userToRead[$j]['id'] ?>
</td>
<td align="center" style="text-align:center;padding-left:15px;background-color:<?php echo $SListsStatus[intval($userToRead[$j]['userstatus'])][1]; ?>;" >
</td>
<td align="center">
<?php echo stripaccenti($userToRead[$j]['user']) ?>
</td>
<td>
<?php echo stripaccenti($SUserType[$userToRead[$j]['type']]['name']) ?>
</td>
<td align="center">
<?php echo stripaccenti($userToRead[$j]['first_name']) ?>
</td>
<td align="center">
<?php echo stripaccenti($userToRead[$j]['last_name']) ?>
</td>
<td align="center">
<?php echo stripaccenti($userToRead[$j]['title']) ?>
</td>
<td class="actBtns">
<a href="#" title="Update" class="tipS">
<img src="images/icons/edit.png" alt="" />
</a>
<a href="#" title="Remove" class="tipS">
<img src="images/icons/remove.png" alt="" />
</a>
</td>
</tr>
<?php } // end for ?>
</tbody>
<tfoot>
<tr>
<td colspan="9">
<div class="itemActions">
<label>Con tutte le selezionate:</label>
<select name="whatDoAll">
<option value="1">Attiva</option>
<option value="2">Disattiva</option>
</select>
<input type="submit" value="Esegui" class="button redB" style="margin: 5px;"/>
</div>
</td>
</tr>
</tfoot>
</table>
</form>
So in every line of my table I have a checkbox where the value is the ID of the db object that I need to modify with my php script.
This is my script:
$('input[type="submit"]').click(function() {
var output = '';
$('input[type="objectSelected"]:checked').each(function(index) {
output += $(this).val() + ", ";
});
alert(output + "is checked!");
});
In the php file i try to retrieve the variable with $_POST['objectSelected'] but the variable is always empty. Also, the script alert is empty.
The tables are create with jquery: if I use a pure html table with pure html checkboxes everything works!

Answer 1

You are doing wrong. You are specifying input type then the code should be:
<script type="text/javascript">
$('input[type="submit"]').click(function() {
var output = '';
$('input[type="checkbox"]:checked').each(function(index) {
output += $(this).val() + ", ";
});
alert(output + "is checked!");
});
</script>
Hope this helps you