Always get Entry not found in haystack in picker zf2

I am new to zf2

I always get an error The input was not found in the haystack

when I select a language from the dropdown. Here's my code:

In my controller

function singleAction(){
—
—-
—-
$language = array();
$languages = $this->getManageTable()->getLanguage();

foreach($languages as $lang){
$language["] = ‘Select Language';
$language[$lang[‘id_language’]] = $lang[‘name’];
}
—
—-
—-
return new ViewModel(array(
‘form’ => $form,
‘language’ => $language,
));
}

      

        
        
        
      

    

Inside manageForm.php:

// Language Input
$language = new Element\Select(‘language’);
$language->setAttributes(array(
‘id’ => ‘language’,
‘class’ => ‘form-control’,
));
$this->add($language);

$language = new InputFilter\Input(‘language’);
$language->setRequired(false);
//$language->removeValidator("NotEmpty"); // not working giving error
// not working giving error:
//$language->setAllowEmptysetRegisterInArrayValidator(false); 
//$language->setErrorMessage(‘Please select language’);
$inputFilter->add($language);

      

        
        
        
      

    

In my view, I named it like this:

Tongue

<?php echo formSelect($form->get(‘language’)->setValueOptions($language)); ?>

      

        
        
        
      

    

Now when I submit without selecting a value from the dropdown it works fine.

.. but if I choose some language and submit, I get this error The input was not found in the haystack

.

I checked my language data, I get a message but if ($form->isValid()) {—-}

gives me an error.

How can I solve this, I have checked many links but did not find any solutions. Please help me. I don't want to check this dropdown.