http://202.103.244.125/catst.php
如上，刚接触PHP被这弄得好焦灼！json_decode出来的永远都是null啊！！！网上的方法也都试了，求大神帮忙
回复讨论(解决方案)
我就不相信你都试了
$url = 'http://202.103.244.125/catst.php';$s = file_get_contents($url);print_r(json_decode(substr($s, 3)));
登入後複製
登入後複製
Array( [0] => stdClass Object ( [menutype] => A [groupx] => 0 [titleng] => 凉菜 [titlech] => Cold Dish ) [1] => stdClass Object ( [menutype] => A [groupx] => 1 [titleng] => 汤 粥 [titlech] => Soup Porrdg ) [2] => stdClass Object ( [menutype] => A [groupx] => 2 [titleng] => 烫菜 [titlech] => Hot food ) [3] => stdClass Object ( [menutype] => A [groupx] => 3 [titleng] => 素菜 [titlech] => Veget -able ) [4] => stdClass Object ( [menutype] => A [groupx] => 4 [titleng] => 主食 [titlech] => Main Food ) [5] => stdClass Object ( [menutype] => A [groupx] => 5 [titleng] => 烤鱼 啤酒鱼 [titlech] => 烤鱼 啤酒鱼 ) [6] => stdClass Object ( [menutype] => A [groupx] => 6 [titleng] => 干锅 汤锅 [titlech] => Gangou Hotpot ) [7] => stdClass Object ( [menutype] => A [groupx] => 7 [titleng] => 铁板 煲仔 [titlech] => Sheet Hotpot ) [8] => stdClass Object ( [menutype] => A [groupx] => 8 [titleng] => 砂锅 [titlech] => Sha Guo ) [9] => stdClass Object ( [menutype] => A [groupx] => 9 [titleng] => [titlech] => ) [10] => stdClass Object ( [menutype] => A [groupx] => 10 [titleng] => 特别 推荐 [titlech] => Special Food ) [11] => stdClass Object ( [menutype] => A [groupx] => 11 [titleng] => 十八酿 [titlech] => 十八酿 ) [12] => stdClass Object ( [menutype] => A [groupx] => 12 [titleng] => 饮料 茶 [titlech] => Drink Tea ) [13] => stdClass Object ( [menutype] => A [groupx] => 13 [titleng] => 其他 自定义 [titlech] => 其他 自定义 ) [14] => stdClass Object ( [menutype] => A [groupx] => 14 [titleng] => 白酒 啤酒 [titlech] => Wine Beer ))
登入後複製
登入後複製
弄个 BOM 头害自己
http://202.103.244.125/catst.php
如上，刚接触PHP被这弄得好焦灼！json_decode出来的永远都是null啊！！！网上的方法也都试了，求大神帮忙
正解
我就不相信你都试了
$url = 'http://202.103.244.125/catst.php';$s = file_get_contents($url);print_r(json_decode(substr($s, 3)));
登入後複製
登入後複製
Array( [0] => stdClass Object ( [menutype] => A [groupx] => 0 [titleng] => 凉菜 [titlech] => Cold Dish ) [1] => stdClass Object ( [menutype] => A [groupx] => 1 [titleng] => 汤 粥 [titlech] => Soup Porrdg ) [2] => stdClass Object ( [menutype] => A [groupx] => 2 [titleng] => 烫菜 [titlech] => Hot food ) [3] => stdClass Object ( [menutype] => A [groupx] => 3 [titleng] => 素菜 [titlech] => Veget -able ) [4] => stdClass Object ( [menutype] => A [groupx] => 4 [titleng] => 主食 [titlech] => Main Food ) [5] => stdClass Object ( [menutype] => A [groupx] => 5 [titleng] => 烤鱼 啤酒鱼 [titlech] => 烤鱼 啤酒鱼 ) [6] => stdClass Object ( [menutype] => A [groupx] => 6 [titleng] => 干锅 汤锅 [titlech] => Gangou Hotpot ) [7] => stdClass Object ( [menutype] => A [groupx] => 7 [titleng] => 铁板 煲仔 [titlech] => Sheet Hotpot ) [8] => stdClass Object ( [menutype] => A [groupx] => 8 [titleng] => 砂锅 [titlech] => Sha Guo ) [9] => stdClass Object ( [menutype] => A [groupx] => 9 [titleng] => [titlech] => ) [10] => stdClass Object ( [menutype] => A [groupx] => 10 [titleng] => 特别 推荐 [titlech] => Special Food ) [11] => stdClass Object ( [menutype] => A [groupx] => 11 [titleng] => 十八酿 [titlech] => 十八酿 ) [12] => stdClass Object ( [menutype] => A [groupx] => 12 [titleng] => 饮料 茶 [titlech] => Drink Tea ) [13] => stdClass Object ( [menutype] => A [groupx] => 13 [titleng] => 其他 自定义 [titlech] => 其他 自定义 ) [14] => stdClass Object ( [menutype] => A [groupx] => 14 [titleng] => 白酒 啤酒 [titlech] => Wine Beer ))
登入後複製
登入後複製
好像真的行了！！！
请问那个substr()的参数为什么是3啊？如果处理其他的json文件也是3吗？还是需要做个判定呢？
utf-8 的BOM 头，是三个字符，所以用 substr 跳过前 3 个字符
既然是要输出 json 那么程序文件要保存为 utf-8 无 BOM 格式
多谢版主！！
