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run code in 300+ PHP versions simultaneously
<?php $m = range(85,110); foreach($m as $val){ $key = $val."00000000000000000"; $a[$key] = $key; } print_r($a); print_r(array_keys($a)); $b["9900000000000000000"]="1"; print_r($b); ?>
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.9, 5.2.15 - 5.2.17, 5.3.4 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.12 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Array ( [8500000000000000000] => 8500000000000000000 [8600000000000000000] => 8600000000000000000 [8700000000000000000] => 8700000000000000000 [8800000000000000000] => 8800000000000000000 [8900000000000000000] => 8900000000000000000 [9000000000000000000] => 9000000000000000000 [9100000000000000000] => 9100000000000000000 [9200000000000000000] => 9200000000000000000 [9300000000000000000] => 9300000000000000000 [9400000000000000000] => 9400000000000000000 [9500000000000000000] => 9500000000000000000 [9600000000000000000] => 9600000000000000000 [9700000000000000000] => 9700000000000000000 [9800000000000000000] => 9800000000000000000 [9900000000000000000] => 9900000000000000000 [10000000000000000000] => 10000000000000000000 [10100000000000000000] => 10100000000000000000 [10200000000000000000] => 10200000000000000000 [10300000000000000000] => 10300000000000000000 [10400000000000000000] => 10400000000000000000 [10500000000000000000] => 10500000000000000000 [10600000000000000000] => 10600000000000000000 [10700000000000000000] => 10700000000000000000 [10800000000000000000] => 10800000000000000000 [10900000000000000000] => 10900000000000000000 [11000000000000000000] => 11000000000000000000 ) Array ( [0] => 8500000000000000000 [1] => 8600000000000000000 [2] => 8700000000000000000 [3] => 8800000000000000000 [4] => 8900000000000000000 [5] => 9000000000000000000 [6] => 9100000000000000000 [7] => 9200000000000000000 [8] => 9300000000000000000 [9] => 9400000000000000000 [10] => 9500000000000000000 [11] => 9600000000000000000 [12] => 9700000000000000000 [13] => 9800000000000000000 [14] => 9900000000000000000 [15] => 10000000000000000000 [16] => 10100000000000000000 [17] => 10200000000000000000 [18] => 10300000000000000000 [19] => 10400000000000000000 [20] => 10500000000000000000 [21] => 10600000000000000000 [22] => 10700000000000000000 [23] => 10800000000000000000 [24] => 10900000000000000000 [25] => 11000000000000000000 ) Array ( [9900000000000000000] => 1 )
Output for 5.2.10 - 5.2.14, 5.3.0 - 5.3.3
Array ( [8500000000000000000] => 8500000000000000000 [8600000000000000000] => 8600000000000000000 [8700000000000000000] => 8700000000000000000 [8800000000000000000] => 8800000000000000000 [8900000000000000000] => 8900000000000000000 [9000000000000000000] => 9000000000000000000 [9100000000000000000] => 9100000000000000000 [9200000000000000000] => 9200000000000000000 [-9146744073709551616] => 9300000000000000000 [-9046744073709551616] => 9400000000000000000 [-8946744073709551616] => 9500000000000000000 [-8846744073709551616] => 9600000000000000000 [-8746744073709551616] => 9700000000000000000 [-8646744073709551616] => 9800000000000000000 [-8546744073709551616] => 9900000000000000000 [10000000000000000000] => 10000000000000000000 [10100000000000000000] => 10100000000000000000 [10200000000000000000] => 10200000000000000000 [10300000000000000000] => 10300000000000000000 [10400000000000000000] => 10400000000000000000 [10500000000000000000] => 10500000000000000000 [10600000000000000000] => 10600000000000000000 [10700000000000000000] => 10700000000000000000 [10800000000000000000] => 10800000000000000000 [10900000000000000000] => 10900000000000000000 [11000000000000000000] => 11000000000000000000 ) Array ( [0] => 8500000000000000000 [1] => 8600000000000000000 [2] => 8700000000000000000 [3] => 8800000000000000000 [4] => 8900000000000000000 [5] => 9000000000000000000 [6] => 9100000000000000000 [7] => 9200000000000000000 [8] => -9146744073709551616 [9] => -9046744073709551616 [10] => -8946744073709551616 [11] => -8846744073709551616 [12] => -8746744073709551616 [13] => -8646744073709551616 [14] => -8546744073709551616 [15] => 10000000000000000000 [16] => 10100000000000000000 [17] => 10200000000000000000 [18] => 10300000000000000000 [19] => 10400000000000000000 [20] => 10500000000000000000 [21] => 10600000000000000000 [22] => 10700000000000000000 [23] => 10800000000000000000 [24] => 10900000000000000000 [25] => 11000000000000000000 ) Array ( [-8546744073709551616] => 1 )

preferences:
224.23 ms | 409 KiB | 315 Q