Pass checkbox values into an array using ajax to php - php

Question

I am needing some help passing checkbox values into an array using ajax and retrieving the values in my controller. The following code is not working. I receive the error: "Invalid argument supplied for foreach()". Var_dump gives string(42) "Educator_Classes[]=1&Educator_Classes;[]=3
Thanks for any help you can provide.
My html form input:
<input type="checkbox" id="Educator_Classes[]" name="Educator_Classes" class="Educator_Classes" value="<?php echo $Class_Number; ?>"/>
My jquery:
$("#Send_Invite").click(function() {
var form_data = {
Opportunity_Id: $('#Opportunity_Id').val(),
Educator_Id: $('#Educator_Id').val(),
Educator_Classes: $('#Educator_Classes:checked').serialize(),
ajax: '1'
};
$.ajax({
url: "<?php echo site_url('schedule/update_educator_class'); ?>",
type: 'POST',
data: form_data,
success: function(data) {
$('#response').html(data);
}
});
return false;
})
My controller:
function update_educator_class() {
$Educator_Id = $this->input->post('Educator_Id');
$Opportunity_Id = $this->input->post('Opportunity_Id');
$Educator_Classes = $this->input->post('Educator_Classes');
foreach($Educator_Classes as $Educator_Class):
$this->ion_auth_model->update_educator_class($Opportunity_Id, $Educator_Class, $Educator_Id);
endforeach;
}

Answer 1

You have to use [] for name attribute and not for id, otherwise it can't act like an array
<input type="checkbox" id="Educator_Classes" name="Educator_Classes[]" class="Educator_Classes" value="<?php echo $Class_Number; ?>"/>
And also your jQuery code can be simpler:
$("#Send_Invite").click(function() {
var form_data = $(this).closest('form).serialize();
form_data['ajax'] = 1;
$.ajax({
url: "<?php echo site_url('schedule/update_educator_class'); ?>",
type: 'POST',
data: form_data,
success: function(data) {
$('#response').html(data);
}
});
return false;
});
To debut what's passed to $Educator_Classes you can do this:
var_export($Educator_Classes);

Answer 2

The Solution is that you have to take the array of name attribute of checkbox.
Like :
<input type="checkbox" id="Educator_Classes[]" name="Educator_Classes[]" class="Educator_Classes" value="<?php echo $Class_Number; ?>"/>