$a = [

    'id',

    'name',

    'identityId',

    'phone',

    'email',

    'schoolId'

];

$b = [

    'id' => '唯一标识',

    'identityId' => '身份证',

    'phone' => '手机号',

    'email' => '邮箱',

    'name' => '姓名',

    'schoolId' => '学校'

];

var_dump(array_merge(array_flip($a), $b));