[ 0 => [ 'a' => 'apple', 'b' => 'banana', 'c' => [ 0 => 'x', 1 => 'y', 2 => 'z', ], ],]
[ 'result' => [ 'mixed' => true, 'contents' => 'Array( [a] => apple [b] => banana [c] => Array ( [0] => x [1] => y [2] => z ))', ], 'php_version' => '7.1.33 Linux x86_64',]
[ 0 => [ 'm' => 'monkey', 'foo' => 'bar', 'x' => [ 0 => 'x', 1 => 'y', 2 => 'z', ], ], 1 => true,]
[ 'result' => [ 'mixed' => 'Array( [m] => monkey [foo] => bar [x] => Array ( [0] => x [1] => y [2] => z ))', 'contents' => '', ], 'php_version' => '7.1.33 Linux x86_64',]