usort()二维数组的排序 2018.8.27

实例

//usort多维数组的排序

$b = [
    ['name'=>'王宝强','age'=>'32'],
    ['name'=>'鹿晗','age'=>'28'],
    ['name'=>'王俊凯','age'=>'20'],
];
usort($b,function ($u,$i){
    return strcmp($u['age'],$i['age']);
});
echo var_export($b);