<?php

$json = "{\"table\": [{\"d\":1, \"p\":1, \"m\": \"1\"},{\"d\":2, \"p\":2, \"m\": \"2\"},{\"d\":3, \"p\":3, \"m\": \"3\"}]}";
$jsonA = json_decode($json, false);
$tableA = $jsonA->table; 

$jsonB = json_decode($json, true);
$tableB = $jsonB['table']; 

var_dump($tableA);
echo '<br />';
var_dump($tableB);