create_custom_question_fields.php

<?php

// register custom fields
qw_add_filter('custom_question_fields', 'qw_custom_question_field');
function qw_custom_question_field($form){

	$form['qw_custom'] = array(
		'label' => 'Custom Field',
		'tags' => 'name="qw_custom"',
		'type' => 'text',
		'value' => ''
	);
	$form['qw_coding'] = array(
		'label' => 'Your coding language',
		'tags' => 'name="qw_coding"',
		'type' => 'select',
		'options' => array('PHP' => 'PHP', 'JavaScript' => 'JavaScript', 'HTML' => 'HTML', 'Visual Basic' => 'Visual Basic')
	);

	return $form;
}

// process custom fields and save in DB
qw_add_filter('custom_save_question_fields', 'qw_custom_save_question_field');
function qw_custom_save_question_field($fields){
	$fields['qw_custom'] = qa_post_text('qw_custom');
	$fields['qw_coding'] = qa_post_text('qw_coding');
	return $fields;
}

//Custom field output
qw_add_action('show_custom_question_fields', 'qw_show_custom_question_field');
function qw_show_custom_question_field($fields, $post){
	$output = '';
	if(isset($fields['qw_coding']))
		$output .= '<p>I love '.$fields['qw_coding'].'</p>';
	
	if(isset($fields['qw_custom']))
		$output .= '<p>My reason: '.$fields['qw_custom'].'</p>';
		
	return $output;
}	

Where can we find this theme Qawork - Theme