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<?php // define class constant linking to a not defined constant class Foo { const FOO = FOO; } class Bar { const BAR = BAR; } echo 'Define the linked constant AFTER reading: ' . PHP_EOL; Foo::FOO; define('FOO', 'Value of FOO'); var_dump(Foo::FOO); echo 'Define the linked constant BEFORE reading: ' . PHP_EOL; define('BAR', 'Value of BAR'); var_dump(Bar::BAR);
Output for git.master, git.master_jit, rfc.property-hooks
Define the linked constant AFTER reading: Fatal error: Uncaught Error: Undefined constant "FOO" in /in/n4DJB:13 Stack trace: #0 {main} thrown in /in/n4DJB on line 13
Process exited with code 255.

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