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run code in 200+ php & hhvm versions
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<?php echo serialize(0.90000);
based on 7AUV7
Output for 7.1.0 - 7.2.0
d:0.9;
Output for 5.6.28, 7.0.20
d:0.90000000000000002;
Output for 5.3.20 - 5.6.21, 7.0.0 - 7.0.6
d:0.90000000000000002220446;