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<?php var_dump(null ?? 'foo'); var_dump(false ?? 'foo'); var_dump('' ?? 'foo'); var_dump(' ' ?? 'foo'); var_dump(0 ?? 'foo'); var_dump([] ?? 'foo');
Output for git.master, git.master_jit, rfc.property-hooks
string(3) "foo" bool(false) string(0) "" string(1) " " int(0) array(0) { }

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