How many items has a multi-value field?

Question

I need to loop through all the values of a multi field as per example bellow:

for ($i = 1; $i < ???; $i++) {

    $a = $form['field_...']['und'][$i]['#entity']->field_...['und'][0]['value'];  

}

of course I could do something like this

foreach ($form['field_additional_sections']['und'] as $key=>$value) {
if (is_int($key)) {
.... }
}

but I was wondering if there is a nicer option to do this. I should probably mention that I'm implementing hook_FORM_ID_form_alter.

Thank you

Answer 1

element_children() is the easiest way to get a list of all child elements in a render array, e.g.

foreach (element_children($form['field_...'][LANGUAGE_NONE]) as $key) {
  $element = $form['field_...'][LANGUAGE_NONE][$key];
}