3v4l.org

run code in 200+ PHP versions simultaneously
<?php function foo(): ?float { return 1.2; } function bar(): ?float { return null; } foo(); bar();
Output for 7.1.0 - 7.4.0
Output for 7.0.0 - 7.0.33
Parse error: syntax error, unexpected '?' in /in/pNpkp on line 3
Process exited with code 255.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.6.40
Parse error: syntax error, unexpected ':', expecting '{' in /in/pNpkp on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected ':', expecting '{' in /in/pNpkp on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `'{'' in /in/pNpkp on line 3
Process exited with code 255.