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<?php $a = ['baz' => 7]; $b = (string) $a['foo'] ?? 'bar'; $c = (string) $a['baz'] ?? 'some thing else'; $d = (string) ($a['foo'] ?? 'bar'); var_dump($b, $c, $d);
Output for git.master, git.master_jit, rfc.property-hooks
Warning: Undefined array key "foo" in /in/WogF7 on line 6 string(0) "" string(1) "7" string(3) "bar"

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