<?php
1=>'',
2=>2,
3=>null,
4=>4,
5=>'');
$i = 0;
foreach($array as $item){
$i++;
}
}
echo "count empty elements:". $i;
PD9waHAKCiRhcnJheSA9IGFycmF5KAoxPT4nJywKMj0+MiwKMz0+bnVsbCwKND0+NCwKNT0+JycpOwoKJGkgPSAwOwpmb3JlYWNoKCRhcnJheSBhcyAkaXRlbSl7CiAgaWYoZW1wdHkoJGl0ZW0pKXsKICAJJGkrKzsKICB9Cn0KCmVjaG8gImNvdW50IGVtcHR5IGVsZW1lbnRzOiIuICRpOw==