3v4l.org

run code in 300+ PHP versions simultaneously
<? namespace B { const TEST12 = 1; } namespace A { use const B\TEST12 as TEST1; echo TEST1; define ( 'TEST1', 5 ); echo TEST1; } ?>
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 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 - 5.4.32, 7.2.29 - 7.2.33, 7.3.16 - 7.3.31, 7.4.0 - 7.4.32, 8.0.0 - 8.0.12, 8.0.14 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.7
<? namespace B { const TEST12 = 1; } namespace A { use const B\TEST12 as TEST1; echo TEST1; define ( 'TEST1', 5 ); echo TEST1; } ?>
Output for 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.6, 7.3.32 - 7.3.33, 7.4.33, 8.0.13
11
Output for 5.4.34 - 5.4.45, 5.5.24 - 5.5.35
Parse error: syntax error, unexpected 'const' (T_CONST), expecting identifier (T_STRING) or \\ (T_NS_SEPARATOR) in /in/PVjGs on line 10
Process exited with code 255.

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