3v4l.org

run code in 300+ PHP versions simultaneously
<?php function foo(): callable { return function() {}; } function bar(): callable { return 'strpos'; } function baz(): callable { return 'baz'; } function qux(): callable { return array(new SplFixedArray(), 'fromArray'); } function quux(): callable { return array('SplFixedArray', 'fromArray'); } function corge(): callable { return 'SplFixedArray::fromArray'; } foo(); bar(); baz(); qux(); quux(); corge();
Output for 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.31, 8.2.0 - 8.2.27, 8.3.0 - 8.3.15, 8.4.1 - 8.4.2
Output for 5.6.0 - 5.6.40
Parse error: syntax error, unexpected ':', expecting '{' in /in/uCeOf on line 3
Process exited with code 255.
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