排序查询
<p>二维数组排序：</p>
<pre><code>array_multisort(array_column($arr,'age'),SORT_DESC,$arr);</code></pre>
<p>多条件orWhere查询</p>
<pre><code>$msgs = Pmmsg::orderBy("id", "desc")->where(function ($query) use ($request) {
$query->where(["uid" => session("member")["id"], "rid" => $request->rid])
->orWhere(function ($query) use ($request) {
$query->where(["rid" => session("member")["id"], "uid" => $request->rid]);
});
});</code></pre>