<?php $m = range(85,110); foreach($m as $val){ $key = $val."00000000000000000"; $a[$key] = $key; } print_r($a); $b["9900000000000000000"]="1"; print_r($b); var_dump(isset($b["-8546744073709551616"])); var_dump(isset($b["9900000000000000000"])); ?>
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