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<?php $n = 0 - 0.0000000000000000000000000001; var_dump($n); // float(-1.0E-33) var_dump(round($n)); // float(-0) var_dump(abs($n)); // float(1.0E-33) var_dump(abs(round($n))); // float(0) var_dump(round($n) == 0); // bool(true) var_dump(round($n) === 0); // bool(false)
Output for 5.2.1 - 5.2.17, 5.3.0 - 5.3.3, 5.3.7 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.35, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.6 - 7.2.33, 7.3.12 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
float(-1.0E-28) float(-0) float(1.0E-28) float(0) bool(true) bool(false)
Output for 4.3.3 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.1 - 5.1.6, 5.2.0, 5.3.4 - 5.3.6
float(-1.0E-28) float(0) float(1.0E-28) float(0) bool(true) bool(false)
Output for 5.1.0
Fatal error: fatal flex scanner internal error--end of buffer missed in /in/VdIjF on line 10
Process exited with code 255.
Output for 4.3.0 - 4.3.2
float(-1.E-28) float(0) float(1.E-28) float(0) bool(true) bool(false)
preferences:
199.58 ms | 401 KiB | 342 Q