1
我正在嘗試重新激活我的php知識以執行以下任務： 我有一個較大的文本文件，其中包含未分類的逗號分隔信息行，每個值都以'''括起來。 每行可以理解爲單個數據集，行的第一個值告訴我該行屬於哪個表。將文本文件讀取，排序並將其拆分爲塊
現在我需要讀取文件，對行進行排序（以便屬於同一行的行表一起），檢測不同的塊，並將它們保存在單獨的文本文件中。之後，我可以使用來自infile的加載數據快速導入到mysql數據庫..
所以，我可以通過以下方式打開文件並對行進行排序：
<?php
$lines = file("importfile_unsorted.txt");
natsort($lines);
file_put_contents("importfile_sorted.txt", implode($lines));
?>
This works。但現在我陷入困境。 importfile_sorted.txt看起來是這樣的：
"AV1","0","0","0","0","0","0","0","0","0","0","0:0","0:0","0:0"
"AV2","0","0","0","0","0","0","0","0","0","0","0:0","0:0","0:0"
... [這將是第一個塊，所有這些行應該保存在「av.txt」 下一行新的塊「F」開頭有幾行：
"F1","D","D","Deutsch",,,"0","W"
"F4","E","E","Englisch",,,"0","W"
"F7","K","K","Kath.Religionslehre",,,"0","W"
"F8","Ev","Ev","Evang.Religionslehre",,,"0","W"
"F9","Eth","Eth","Ethik",,,"0","W"
... [保存爲fxx開頭的幾行代碼寫進文件f.txt並進入下一個塊]
"G1","PhL","PÜG"
"G2","ChL","ChÜ"
..
"K1","5a","5a",,"304","Ma","Wei","0","16","16","5",,,,,"1","1","0",,"0","0","0","0"
"K2","5b","5b",,"303","Wo","Hm","0","32","16","5",,,,,"1","1","0",,"0","0","0","0"
"K3","5c","5c",,"302","Gr","Ro","0","32","16","5",,,,,"1","1","0",,"0","0","0","0"
...等等。以後，有塊與這樣固定的第一列：
"PL","Di 1","Ba","Q12","Inf1","CoR1"
"PL","Di 1","Bb","Q12","F","Ü2"
"PL","Di 1","Eg","Q12","L","M23"
... 和
"PLS","Di 1","Am"," frei "
"PLS","Di 1","Bad"," ----"
"PLS","Di 1","Bk"," frei "
... 其次是其他幾個塊（L1 ... L97，M R1 ... R40，U1 ... U560）。
我知道塊的所有可能的「標識符」（AVx，Fx，Gx，.. PL，PLS ..），但是也可以省略塊並且輸入文件不是單行它根本就沒有。 輸入文件一共包含大約4000行，所以性能不應該太低（儘管它不是時間關鍵，每年可能導入10次）。
那麼，有沒有辦法以「智能」和快速的方式完成這項工作，或者我應該逐行讀取輸入文件，檢測並記住第一個值，將當前行添加到結果字符串並循環直到出現新的第一個值？
感謝您的幫助！ 海科
爲什麼分割文件到單獨的文件？我會做的是創建一個臨時表，並將第一列導入到該表中。然後使用php來查詢第1列的不同列表，循環並僅運行查詢'INSERT INTO {$ tableName} SELECT col2，col3 ... etc從tmp_table WHERE col1 ='{$ tableName}''。如果每個表的列數都是可變的，則只需在php中描述每個表以獲取列並僅選擇所需內容。此外，使臨時表具有您需要的最大數量的列。 –
感謝喬納森的快速回答。我寧願分裂，因爲使用加載數據infile將數據導入到mysql很容易和快速，所以我正在尋找一種分割輸入文件的好方法。另外，不同塊之間的數據類型也不相同（例如，塊1中的第二個字段爲int，塊2中爲時間...）。 – Heiko
@Jonathan Kuhn，我終於有時間按照你的建議。我認爲這會更復雜，但一切都平穩快速，所以謝謝你指點我正確的方向！ – Heiko