3v4l.org

run code in 300+ PHP versions simultaneously
<?php namespace Foo; define('Foo\\null', true, true); define('Foo\\false', true, true); define("Foo\\INF", 1337, true); echo 'null:';if (null) echo "TRUE";else echo "FALSE"; echo "\nfalse:";if (false) echo "TRUE";else echo "FALSE"; echo "\ntrue:";if (true) echo "TRUE";else echo "FALSE"; $n=acos(1.01); echo "\nNAN:".$n;
Output for git.master, git.master_jit, rfc.property-hooks
Warning: define(): Argument #3 ($case_insensitive) is ignored since declaration of case-insensitive constants is no longer supported in /in/mHv7L on line 3 Warning: define(): Argument #3 ($case_insensitive) is ignored since declaration of case-insensitive constants is no longer supported in /in/mHv7L on line 4 Warning: define(): Argument #3 ($case_insensitive) is ignored since declaration of case-insensitive constants is no longer supported in /in/mHv7L on line 5 null:FALSE false:FALSE true:TRUE NAN:NAN

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