PHP　解析JSON数组

<?php

$postArray ='[{"data":{"hello":"world"},"type":"1234","date":"2012-10-30 17:6:9","user":"000000000000000","time_stamp":1351587969902}, {"data":{"hello":"world"},"type":"1234","date":"2012-10-30 17:12:53","user":"000000000000000","time_stamp":1351588373519}]';

$de_json = json_decode($postArray,TRUE);
$count_json = count($de_json);
for ($i = 0; $i < $count_json; $i++)
{
//echo var_dump($de_json);

$dt_record = $de_json[$i]['date'];
$data_type = $de_json[$i]['type'];
$imei = $de_json[$i]['user'];
$message = json_encode($de_json[$i]['data']);

}

?>