数组 与 json 字符转换

[php]代码库

$json = '{"type":"image","media_id":"m0DgdZ1Cqsa7NlpIwc10gpPwlGaVl0HonTSQM_tyY_d6KspUYKBOL4NSRhHWf4pa","created_at":1411973442}'; 

$ce = json_decode($content,true); //json 转 数组 
print_r($ce);

$cetxt = json_encode($ce);//数组 转 json
echo $ctext;