<?php
function update_price_wpuf_form( $post_id ) {
   	$boolChifre 	= isset( $_POST['pa_chifre'] ) ? $_POST['pa_chifre'] : 0;
   	$currentPrice 	= get_post_meta( $post_id, '_regular_price' );
	$images 		= get_post_meta( $post_id, '_product_image' );
	$images 		= count($images);

	if ( $images > 2 ) {
		$currentPrice = 35;
	}

   	if( $boolChifre == 62) {
       $regular_price = (int)$currentPrice + 10;
   	}

 	update_post_meta( $post_id, '_regular_price', $regular_price );
}