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run code in 300+ PHP versions simultaneously
<?php $a = new stdClass(); $tmp = (array) $a; var_dump(empty($tmp)); var_dump(empty($a)); if ($a == null) { echo "null"; print_r($a); } else if (empty($a)){ echo "empty"; print_r($a); }else if (!isset($a)){ echo "set"; print_r($a); } var_dump(empty($tmp));

preferences:
34.09 ms | 402 KiB | 5 Q