tes ini

<?php
$s="[{
                                        name: 'Pendapatan Tahun Ini (Milyar)',
                                        data: [ 24, 17, 20,
                                                20, 21, 21, 23, 24, 25, 19, 17, 23]
                                        },
                                        {
                                        name: 'Pendapatan Tahun Lalu (Milyar)',
                                        data: [ 32, 20, 21,
                                        17, 14, 30, 41, 20 ,18 ,16 ,20 ,24]
                                        }]";
$a=json_decode($s,TRUE);
echo '<pre>'; var_dump($a); //null ??

$ar=array(
  array('name'=>'satu', 'data'=>array(24,34,45,64) ),
  array('name'=>'dua', 'data'=>array(54,74,85,62) ),
);

$s=json_encode($ar);
echo "<br>$s";