php中的分组json输出

建议使用任何其他方式显示上述输出，而不是执行mysqli_fetch_all，一次提取每一行并在一次操作中将其转换为正确格式可能更容易（也可能更快）

{"cse":

[{"year":"1","semester":"1","count":"4"},
{"year":"2","semester":"1","count":"1"},
{"year":"2","semester":"2","count":"2"},
{"year":"2","semester":"4","count":"1"},
{"year":"3","semester":"2","count":"1"},
{"year":"3","semester":"3","count":"2"},
{"year":"4","semester":"3","count":"1"},
{"year":"4","semester":"4","count":"2"}],

"ece":

[{"year":"1","semester":"4","count":"2"},
{"year":"2","semester":"2","count":"2"},
{"year":"2","semester":"3","count":"1"},
{"year":"3","semester":"1","count":"1"},
{"year":"3","semester":"3","count":"2"},
{"year":"4","semester":"2","count":"2"},
{"year":"4","semester":"4","count":"2"}],

"eee":

[{"year":"1","semester":"1","count":"1"},
{"year":"1","semester":"4","count":"1"},
{"year":"2","semester":"1","count":"1"},
{"year":"2","semester":"2","count":"3"},
{"year":"2","semester":"3","count":"2"},
{"year":"2","semester":"4","count":"1"},
{"year":"3","semester":"1","count":"1"},
{"year":"3","semester":"3","count":"4"},
{"year":"3","semester":"4","count":"3"},
{"year":"4","semester":"2","count":"3"},
{"year":"4","semester":"3","count":"2"},
{"year":"4","semester":"4","count":"1"}]}

---

可能重复：谢谢…它的工作兄弟…有没有办法以更吸引人的方式显示json格式的输出？你可以使用

json\u encode（$output，json\u PRETTY\u PRINT）

与json\u encode（$output，json\u PRETTY\u PRINT）没有区别@Maheshraminedi请定义“吸引人”然后…你到底是什么意思？你想看什么？JSON只是用于传输或存储的数据，并不真正用于显示，因此除了“漂亮打印”设置（这可能没有多大影响，具体取决于您使用什么客户端来接收数据）之外，实际上没有任何选项。

{"cse":

[{"year":"1","semester":"1","count":"4"},
{"year":"2","semester":"1","count":"1"},
{"year":"2","semester":"2","count":"2"},
{"year":"2","semester":"4","count":"1"},
{"year":"3","semester":"2","count":"1"},
{"year":"3","semester":"3","count":"2"},
{"year":"4","semester":"3","count":"1"},
{"year":"4","semester":"4","count":"2"}],

"ece":

[{"year":"1","semester":"4","count":"2"},
{"year":"2","semester":"2","count":"2"},
{"year":"2","semester":"3","count":"1"},
{"year":"3","semester":"1","count":"1"},
{"year":"3","semester":"3","count":"2"},
{"year":"4","semester":"2","count":"2"},
{"year":"4","semester":"4","count":"2"}],

"eee":

[{"year":"1","semester":"1","count":"1"},
{"year":"1","semester":"4","count":"1"},
{"year":"2","semester":"1","count":"1"},
{"year":"2","semester":"2","count":"3"},
{"year":"2","semester":"3","count":"2"},
{"year":"2","semester":"4","count":"1"},
{"year":"3","semester":"1","count":"1"},
{"year":"3","semester":"3","count":"4"},
{"year":"3","semester":"4","count":"3"},
{"year":"4","semester":"2","count":"3"},
{"year":"4","semester":"3","count":"2"},
{"year":"4","semester":"4","count":"1"}]}

$result = mysqli_query($link,$query);
$output = [];
while ( $rows= mysqli_fetch_assoc($result)) {
    $output [$rows['branch']][] = ["year" => $rows['year'], 
                   "semester" => $rows['semester'], 
                   "count" => $rows['count']];
}
echo json_encode($output);