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<?php $m = range(85,110); foreach($m as $val){ $key = $val."00000000000000000"; $a[$key] = $key; } print_r($a); var_dump(isset($a["9300000000000000000"])); $b["9900000000000000000"]="1"; print_r($b); ?>

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35.4 ms | 402 KiB | 5 Q