<?php 
$json='{"province":{"ah":"安徽省","bj":"北京市"},"province2":{"fj":"福建省","gz":"贵州省","www.yuanshi88.com"}}'; 
$J=json_decode($json); 
echo $J->province->bj; 
?>//以上代码调试正常可以输出北京市 
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提问: 
把 {"province":{"ah":"安徽省","bj":"北京市"},"province2":{"fj":"福建省","gz":"贵州省","www.yuanshi88.com"}} 保存在1.txt中 <?php 
$url='1.txt'; 
$json=file_get_contents($url); 
$J=json_decode($json); 
echo $J->province->bj; 
?>//以上代码不能输出北京市 
请问如何解决不输出北京市 
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