php-8.0.30-src/Zend/tests/use_function/conditional_function_declaration.phpt

--TEST--
function that is conditionally defined is subject to symbol use checks
--FILE--
<?php

if (0) {
    function foo() {
    }
}

use function bar\foo;

echo "Done";

?>
--EXPECTF--
Fatal error: Cannot use function bar\foo as foo because the name is already in use in %s on line %d