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<?php $empty_string = ""; $value1 = $empty_string1 ?: "non-empty string"; var_dump($value1); $non_empty_string = "something"; $value2 = $empty_string2 ?: "non-empty string"; var_dump($value2);
Output for git.master, git.master_jit, rfc.property-hooks
Warning: Undefined variable $empty_string1 in /in/Y6Mcf on line 2 string(16) "non-empty string" Warning: Undefined variable $empty_string2 in /in/Y6Mcf on line 3 string(16) "non-empty string"

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