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run code in 300+ PHP versions simultaneously
<?php function foo(int $i) { echo $i; } foo("");
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.26, 8.4.1 - 8.4.13
Fatal error: Uncaught TypeError: foo(): Argument #1 ($i) must be of type int, string given, called in /in/N9IpU on line 6 and defined in /in/N9IpU:3 Stack trace: #0 /in/N9IpU(6): foo('') #1 {main} thrown in /in/N9IpU on line 3
Process exited with code 255.
Output for 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
Fatal error: Uncaught TypeError: Argument 1 passed to foo() must be of the type int, string given, called in /in/N9IpU on line 6 and defined in /in/N9IpU:3 Stack trace: #0 /in/N9IpU(6): foo('') #1 {main} thrown in /in/N9IpU on line 3
Process exited with code 255.
Output for 7.2.0 - 7.2.33
Fatal error: Uncaught TypeError: Argument 1 passed to foo() must be of the type integer, string given, called in /in/N9IpU on line 6 and defined in /in/N9IpU:3 Stack trace: #0 /in/N9IpU(6): foo('') #1 {main} thrown in /in/N9IpU on line 3
Process exited with code 255.

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