32
'Hello world!'
32.5
数组 ( 0 => 'red', 1 => 'green', 2 => 'blue', )
数组 ( 0 => 32, 1 => 'Hello world!', 2 => 32.5, 3 => 数组 ( 0 => 'red', 1 => 'green', 2 => 'blue', ), )