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<?php var_dump(-0.0,1.0,0.1); echo "\n"; var_export([-0.0,1.0,0.1]); echo "\n";
Output for 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 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
float(-0) float(1) float(0.1) array ( 0 => -0.0, 1 => 1.0, 2 => 0.1, )
Output for 7.0.2 - 7.0.33
float(-0) float(1) float(0.1) array ( 0 => -0.0, 1 => 1.0, 2 => 0.10000000000000001, )
Output for 5.5.6 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.1
float(0) float(1) float(0.1) array ( 0 => 0, 1 => 1, 2 => 0.10000000000000001, )
Output for 5.5.0 - 5.5.5
float(0) float(1) float(0.1) array ( 0 => 0, 1 => 1, 2 => 0.1, )

preferences:
254.06 ms | 401 KiB | 330 Q