我需要得到csv列中的值（分組）數量

我需要獲得第一列值的計數。這些ID可能或可能不存在於我收到的任何給定的.csv文件中。所以我需要通過查看第一列的.csv文件進行循環，如果它不存在，或者將它添加到保存數組（$ PWSs），或者如果我已經添加它，則增加此保存數組中的計數。我需要得到csv列中的值（分組）數量

我第一循環使用fgetcsv（）..這個工程的裂解成文件：

$PWSs = array(); 

$handle2 = fopen ($uploadfileandpath,"r"); 
while ($field2array = fgetcsv ($handle2, 130000, ",")) 
{ 
    // Here is where I would add value or increment $PWSs array 
    while (?) 
    { 
     if ($field2array[0] != ?) 
     { 
      // Add or increment 
     } 
    } 
}

下面是實際數據。第一列有公共水系統的ID。我需要數它們。

"00513","08/13/2009","090834311A","R","4","OR1000x6","N","N","E",,1,".73","COLILERT" 
"00513","08/13/2009","090834312A","R","39","OR1000x6","N","N","E",,1,".35","COLILERT" 
"00154","08/13/2009","090835401A","R","300 Falls Road","OR100016","N","N","E",,1,".10","COLILERT" 
"95343","08/13/2009","090835601A","R","Room 1 Sink","OR1000x6","N","N","E",,1,,"COLILERT" 
"94585","08/14/2009","090837701A","R","Kitchen","OR1000x6","N","N","E",,1,,"COLILERT" 
"94704","08/14/2009","090837801A","R","Outside Tap","OR1000x6","N","N","E",,1,,"COLILERT" 
"01430","08/14/2009","090838201A","R","100 Deer Park Ln OT","OR1000x6","N","N","E",,1,,"COLILERT" 
"00625","08/14/2009","090839001A","R","Dano and N Rose","OR100016","N","N","E",,1,".35","COLILERT" 
"00405","08/17/2009","090840301A","R","Westmont Drive","OR100016","N","N","E",,1,".28","COLILERT" 
"01031","08/17/2009","090840401A","R","Unit 2 Faucet","OR100016","N","N","E",,1,,"COLILERT" 
"00625","08/17/2009","090840601A","R","Luman Road","OR1000x6","N","N","E",,1,".35","COLILERT" 
"00513","08/17/2009","090841001A","R","40","OR1000x6","N","N","E",,1,".18","COLILERT" 
"00513","08/17/2009","090841002A","R","10","OR1000x6","N","N","E",,1,".16","COLILERT"

來源

2011-01-06 JustJohn

$fh = fopen('file.csv', 'rb'); 

$PWS = array(); 
while($row = fgetcsv($fh)) { 
    $PWS[$row[0]]++; 
}

基本上，它會在PWS使用填充第一列值作爲鍵，並隨着它們的增加而增加。此後，鑑於上述您的樣本CSV，你會最終

$PWS = array(
    '00513' => 4 
    '00154' => 1 
    '95343' => 1 
    '94585' => 1 
etc... 
);

來源

2011-01-06 03:02:29

感謝Marc B.此代碼感謝您的工作，但我也收到一個未定義的索引： $ fh = fopen（$ uploadfileandpath，「r」）; $ PWSs = array（）; while（$ row = fgetcsv（$ fh，130000，「，」））{ $ PWSs [$ row [0]] ++; //該行爲每個新值返回一個未定義的索引（它仍然將它們加起來） } foreach（$ PWSs as $ key => $ value）{ print「$ key：$ value
」; } fclose（$ fh）; – JustJohn 2011-01-06 18:48:28

我上面的評論不太可讀。下面是一行得到「未定義索引」錯誤。（我無法更改錯誤報告級別）：$ PWSs [$ row [0]] ++; – JustJohn 2011-01-06 18:51:53

好吧，我放棄了努力變得聰明，我很聰明。我把它放在頁面的頂部，以避免未定義的索引通知：error_reporting（E_ALL^E_NOTICE）; – JustJohn 2011-01-06 23:05:38

你只需要一個而循環。您的外部while循環在它到達eof時將停止，因爲fgetcsv（）將返回FALSE。

然後只是測試列爲NULL或「」一個空字符串。如果列在給定數組中不存在，則應使用isset（）以確保它在條件中第一個存在。指出這一點DQ感謝：）

編輯;

來源

2011-01-06 01:36:18

function get_pws() 
{ 
    $PWSs = array(); 

    $handle2 = fopen ($uploadfileandpath,"r"); 
    while ($field2array = fgetcsv ($handle2, 130000, ",")) 
    { 
     if(!in_array($field2array[0], $PWSs)) 
     { 
      array_push($PWSs, array('key'=>$field2array[0], 'count'=>1)); 
     } 
     else 
     { 
      foreach($PWSs as &$PWS) 
      { 
       if($PWS['key'] == $field2array[0]) 
       { 
        ++$PWS['count']; 
       } 
      } 
     } 
    } 

    return $PWSs; 
}

我還沒有實際運行和測試這個腳本，所以希望它的工作原理，它是你在找什麼。同樣，我沒有測試過，所以希望它仍然有效（不與PHP安裝ATM的機器上）（如果它擺在首位的工作）：P

來源

2011-01-06 01:37:18

澄清，這個統計有多少不同的唯一ID有很多行不只是如何包含的ID。 – dqhendricks 2011-01-06 01:42:24

我需要得到csv列中的值（分組）數量

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