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<?php var_dump(empty('')); var_dump(empty(0)); var_dump(empty(false)); var_dump(empty(null)); $a = 0; var_dump($a ?: 'a'); // empty var_dump($a ?? 'a'); // isset $a = ''; var_dump($a ?: 'a'); // empty var_dump($a ?? 'a'); // isset $a = false; var_dump($a ?: 'a'); // empty var_dump($a ?? 'a'); // isset $a = null; var_dump($a ?: 'a'); // empty var_dump($a ?? 'a'); // isset
Output for git.master, git.master_jit, rfc.property-hooks
bool(true) bool(true) bool(true) bool(true) string(1) "a" int(0) string(1) "a" string(0) "" string(1) "a" bool(false) string(1) "a" string(1) "a"

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