$resolutions = array(
'4:3' => array(
'1024x768',
'1600x1200',
'2048x1536'
),
'16:9' => array(
'1280x720',
'1366x768',
'1600x900',
'1920x1080',
'2560x1440'
),
'16:10' => array(
'1280x800',
'1440x900',
'1680x1050',
'1920x1200',
'2560x1600'
)
);
如何获得“纵横比”,即值:4:3、16:9、16:10?
回声 $resolutions[0]
不输出任何东西