$mokiniai= [
    '5b' => [
       "MOK-".rand(5,10) => [
           'data' => date('y-m-d'),
           'vardas' => "Jonas",
           'pavarde' => "Jonaitis",
           'ivertinimai' => [
               'anglu' =>5,
               'programavimas' => 7,
               'matematika' => 10
]
       ],
        "MOK-".rand(5,10) => [
           'data' => date('y-m-d'),
           'vardas' => "Petras",
           'pavarde' => "Petraitis",
           'ivertinimai' => [
               'anglu' =>5,
               'programavimas' => 7,
               'matematika' => 10
]
       ],
        "MOK-".rand(5,10) => [
           'data' => date('y-m-d'),
           'vardas' => "Vardenis",
           'pavarde' => "Pavardenis",
           'ivertinimai' => [
               'anglu' =>5,
               'programavimas' => 7,
               'matematika' => 10
]

   ]
   ],
      '5a' => [
         "MOK-".rand(5,10) => [
           'data' => date('y-m-d'),
           'vardas' => "Kodas",
           'pavarde' => "Kodaitis",
           'ivertinimai' => [
               'anglu' =>5,
               'programavimas' => 7,
               'matematika' => 10
]
       ]
    ],

];

?>