How to change the number of possible files depending on their type?

Question

Yii

How can I make it so that if the user can select only 1 pdf file, or several jpg.?
The form:

<?= $form->field($model, 'tmpFile')->textInput(['multyple' => true]);

Rules:

[['tmpFile'], 'file' 'extenstions' => 'jpf, pdf', 'mime-types' => 'image/jpef, application/pdf', 'maxFiles' => 5]

Answer 1

Group files by type and then check

if(count($arr['jpg']) > 5 || count($arr['pdf']) > 1 )
  return;

Answer 2

You need to create a separate validator and validate in it.