<?$invo = 0;foreach($invoices as $item): ?><? if (!($item['invoice_status'] == 1)) {continue;}?><? $invo=$invo+$item['invoice_ammount']; ?><?endforeach; echo $invo; ?>
<?= array_sum(array_map(function ($item) {\rreturn $item['invoice_status'] == 1 ? $item['invoice_ammount'] : 0;\r}, $invoices)) ?>
<?=array_reduce($invoices, function(&$sum, $item) {\rreturn $sum + ($item['invoice_status'] == 1) ? $item['invoice_ammount'] : 0;\r})?>
<?$invo = 0;\rforeach($invoices as $item): ?>\r<? if (!($item['invoice_status'] == 1)) {\rcontinue;\r}?>\r<? $invo += $item['invoice_ammount']; ?>\r<?endforeach; echo $invo; ?>