【問題解決】PHP多次元配列ソート問題

最近 PHP を使って作業していて、多次元配列のソートに関する問題に遭遇しました。この一連の配列にはキーキー PID があり、PID に従って配列を再配置する必要があります。最初のレベルの配列をソートするだけです。 Array_multisort() を使用しましたが、エラーが発生しました。以下の通り:

Array(    [0] => Array        (            [pid] => 0            [title] => 首页            [path] => index            [current] => 0            [link] => /index.php        )    [1] => Array        (            [tid] => 3            [pid] => 8            [mid] => 8            [topid] => 0            [upid] => 0            [exmid] => 0            [linkid] => 2            [gotoid] => 17            [lng] => cn            [larray] => Array                (                    [0] => Array                        (                            [tid] => 17                            [pid] => 50                            [mid] => 8                            [topid] => 3                            [upid] => 3                        )                    [1] => Array                        (                            [tid] => 18                            [pid] => 50                            [mid] => 8                            [topid] => 3                            [upid] => 3                        )                    [2] => Array                        (                            [tid] => 19                            [pid] => 50                            [mid] => 8                            [topid] => 3                            [upid] => 3                        )                )        )    [2] => Array        (            [tid] => 5            [pid] => 2            [mid] => 3            [topid] => 0            [upid] => 0            [exmid] => 0            [larray] => Array                (                    [0] => Array                        (                            [tid] => 11                            [pid] => 50                            [mid] => 3                            [topid] => 5                            [upid] => 5                        )                    [1] => Array                        (                            [tid] => 12                            [pid] => 50                            [mid] => 3                            [topid] => 5                            [upid] => 5                        )                    [2] => Array                        (                            [tid] => 22                            [pid] => 50                            [mid] => 8                            [topid] => 5                            [upid] => 5                        )                )        )    [3] => Array        (            [tid] => 50            [pid] => 4            [mid] => 8            [topid] => 0            [upid] => 0            [larray] =>         )   )

最終結果は次のようになります: PID に従って小さいものから大きいものへと並べ替えられます。

Array(    [0] => Array        (            [pid] => 0            [title] => 首页            [path] => index            [current] => 0            [link] => /index.php        )    [1] => Array	        (            [tid] => 5            [pid] => 2            [mid] => 3            [topid] => 0            [upid] => 0            [exmid] => 0            [larray] => Array                (                    [0] => Array                        (                            [tid] => 11                            [pid] => 50                            [mid] => 3                            [topid] => 5                            [upid] => 5                        )                    [1] => Array                        (                            [tid] => 12                            [pid] => 50                            [mid] => 3                            [topid] => 5                            [upid] => 5                        )                    [2] => Array                        (                            [tid] => 22                            [pid] => 50                            [mid] => 8                            [topid] => 5                            [upid] => 5                        )                )        )    [2] => Array        (            [tid] => 50            [pid] => 4            [mid] => 8            [topid] => 0            [upid] => 0            [larray] =>         )    [3] => Array        (            [tid] => 3            [pid] => 8            [mid] => 8            [topid] => 0            [upid] => 0            [exmid] => 0            [linkid] => 2            [gotoid] => 17            [lng] => cn            [larray] => Array                (                    [0] => Array                        (                            [tid] => 17                            [pid] => 50                            [mid] => 8                            [topid] => 3                            [upid] => 3                        )                    [1] => Array                        (                            [tid] => 18                            [pid] => 50                            [mid] => 8                            [topid] => 3                            [upid] => 3                        )                    [2] => Array                        (                            [tid] => 19                            [pid] => 50                            [mid] => 8                            [topid] => 3                            [upid] => 3                        )                )        )   )

ディスカッションへの返信 (解決策)

テストのために var_export(); の後に配列を投稿することをお勧めします

専門家を待って、並べ替えのみを選択します

元の配列は $ar であると仮定します次に、

array_multisort(array_map(function($item){ return $item['pid']; }, $ar), $ar);

があります

テストのために var_export(); の後に配列をポストすることをお勧めします

これは print_r が出力するものです

テストのために var_export(); の後に配列をポストすることをお勧めします