Hi,
I have a couple of array form fields , I would like to validate that atleast one of the field in the array field is not empty.
i have created the form with the following fields
$mform->addElement('text','experience[job][]');
$mform->addElement('text','experience[ins][]');
$mform->addElement('text','training[job][]');
$mform->addElement('text','training[cert][]');
So the validation should check atleast the training[job][0] is not empty