3v4l.org

run code in 300+ PHP versions simultaneously
<?php function test(?string $bla) { echo "Hello World"; } test(null);
Output for 7.1.0, 7.2.29 - 7.2.33, 7.3.16 - 7.3.33, 7.4.3 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Hello World
Output for 5.6.8 - 5.6.16, 7.0.0
Parse error: syntax error, unexpected '?', expecting variable (T_VARIABLE) in /in/c9fN5 on line 3
Process exited with code 255.
Output for 5.5.24 - 5.5.30
Parse error: syntax error, unexpected '?', expecting '&' or variable (T_VARIABLE) in /in/c9fN5 on line 3
Process exited with code 255.
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155.92 ms | 401 KiB | 156 Q