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<?php class double {} f(new double); function f(double $d){ var_dump($d); }
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Warning: "double" will be interpreted as a class name. Did you mean "float"? Write "\double" to suppress this warning in /in/S5iSs on line 5 object(double)#1 (0) { }
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
object(double)#1 (0) { }

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162.11 ms | 402 KiB | 212 Q