<?php

$a = [1,3,4];
$c['blocks'] = $a;
$b = json_encode($c);
var_dump($b);
$d = json_decode($b);
var_dump($d);


$tes = '"blocks":[{"bl":0},{"bl":0},{"bl":0},{"bl":0},{"bl":0},{"bl":0},{"bl":0},{"bl":1},{"bl":1},{"bl":1},{"bl":1},{"bl":1},{"bl":1},{"bl":1},{"bl":1},{"bl":1},{"bl":1},{"bl":1}],"prices":[{"nom":7,"price":1800},{"nom":9,"price":2000},{"nom":13,"price":2300},{"nom":16,"price":2500}]';

$a = '{' . $tes . '}';

$test = json_decode($a ,true);

var_dump($test);