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run code in 300+ PHP versions simultaneously
<?php function foo(): integer {return 6;} echo foo();
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: "integer" will be interpreted as a class name. Did you mean "int"? Write "\integer" to suppress this warning in /in/XVsPs on line 3 Fatal error: Uncaught TypeError: foo(): Return value must be of type integer, int returned in /in/XVsPs:3 Stack trace: #0 /in/XVsPs(4): foo() #1 {main} thrown in /in/XVsPs on line 3
Process exited with code 255.
Output for 7.3.16 - 7.3.33, 7.4.0 - 7.4.33
Fatal error: Uncaught TypeError: Return value of foo() must be an instance of integer, int returned in /in/XVsPs:3 Stack trace: #0 /in/XVsPs(4): foo() #1 {main} thrown in /in/XVsPs on line 3
Process exited with code 255.
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33
Fatal error: Uncaught TypeError: Return value of foo() must be an instance of integer, integer returned in /in/XVsPs:3 Stack trace: #0 /in/XVsPs(4): foo() #1 {main} thrown in /in/XVsPs on line 3
Process exited with code 255.
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.28
Parse error: syntax error, unexpected ':', expecting '{' in /in/XVsPs on line 3
Process exited with code 255.

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