<?php $a = (int)2 ** 63 -1; $b = 0x7FFFFFFFFFFFFFFF; var_dump(($a == $b) === true); var_dump((int)2 ** 63 -1); // -9.2233720368548E+18 var_dump((float) 0x7FFFFFFFFFFFFFFF); // 9223372036854775807 var_dump((0x7FFFFFFFFFFFFFFF == (2 ** 63 -1)) === true); // 9223372036854775807 === -9223372036854800000 // sure why not
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