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<?php proc_open();
Output for 8.0.0 - 8.0.12, 8.0.14 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Fatal error: Uncaught Error: Call to undefined function proc_open() in /in/R9B58:2 Stack trace: #0 {main} thrown in /in/R9B58 on line 2
Process exited with code 255.
Output for 8.0.13
Fatal error: Uncaught ArgumentCountError: proc_open() expects at least 3 arguments, 0 given in /in/R9B58:2 Stack trace: #0 /in/R9B58(2): proc_open() #1 {main} thrown in /in/R9B58 on line 2
Process exited with code 255.
Output for 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 7.3.32 - 7.3.33, 7.4.26, 7.4.33
Warning: proc_open() expects at least 3 parameters, 0 given in /in/R9B58 on line 2
Output for 5.6.0 - 5.6.38, 7.0.0 - 7.0.33, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.25, 7.4.27 - 7.4.32
Warning: proc_open() has been disabled for security reasons in /in/R9B58 on line 2
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9
Warning: proc_open() expects exactly 3 parameters, 0 given in /in/R9B58 on line 2

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