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run code in 300+ PHP versions simultaneously
<?php function is32Bit() { // This is for max compatibility: // PHP_INT_MAX doesn't exist in PHP4 // current() *requires* a reference in PHP <5.1.0 (except 4.4.1, dafuq) $test = unpack('N', "\xFF\xFF\xFF\xFF"); return current($test) === -1; } var_dump(is32Bit());

preferences:
49.28 ms | 402 KiB | 5 Q