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<?php $foo = true; var_dump($foo ?: $bar); var_dump($foo ?? $bar); var_dump($bar ?: $foo); var_dump($bar ?? $foo);
Output for git.master, git.master_jit, rfc.property-hooks
bool(true) bool(true) Warning: Undefined variable $bar in /in/fr367 on line 8 bool(true) bool(true)

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