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run code in 150+ php & hhvm versions
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<?php var_dump( (int) 0x000fffffffffffff ); var_dump( (int) 0x000ffffffffffffe ); var_dump( (int) 0x000ffffffffffffd );
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
int(4503599627370495) int(4503599627370494) int(4503599627370493)