php实现json编码的方法

<?php/* * json */$books = array('key1'=>'value1','key2'=>'value2','key3'=>array('key4'=>'value4','key5'=>'value5'));$json = json_encode($books);$rejson = json_decode($json,true);echo '原数组：<br/>';print_r($books);echo '<br/><br/>';echo '经json编码后：<br/>';print $json."<br/>";echo '<br/>';echo '经json解码后：<br/>';print_r($rejson);echo '<br/><br/>';//实例$jsonn = '{"error_code":"400","request":"//Router//aQConnectError","api_code":40006,"error":"/u4f20/u5165/u7684/u63a5/u53e3/u53c2/u6570/u51fa/u9519/uff0c/u53c2/u6570openid/u672a/u8bbe/u5b9a/u3002"}';print_r(json_decode($jsonn));?>