如何從數組中打印特定值？

我想打印的第一個值219的情況下截圖中提到：downloadl然後我需要打印第二個值id = 219的情況下：downloadp.but，數組$ value ['printp']得到兩個值放入表格中（例如：選擇usera選擇用戶b）。但我需要打印這個$ value ['printp']只有一個和第一個值。如何從數組中打印特定值？

case 'downloadl': 


$sql = "SELECT post_id,printprocess,printsupply,printesb,printwork,printpri,printmate FROM printtable WHERE post_id=" .$post_id; 

     $query = $db->sql_query($sql); 
     $print_data = array(); 
     while($roww = mysqli_fetch_array($query)){ 

       $print_data[] = array(
       'printp' => $roww['printprocess'], 
       'prints' => $roww['printsupply'], 
       'printsb' => $roww['printesb'], 
       'printwrk' => $roww['printwork'], 
       'printpr' => $roww['printpri'], 
       'printmat' => $roww['printmate'], 
       ); 
     } 

       foreach($print_data as $value) { 

        $objPHPExcel->setActiveSheetIndex(0) 
         ->setCellValue('A'.$j, ''); 
        $objPHPExcel->setActiveSheetIndex(0)->setCellValue('B'.$j, ''); 
        $j++; 
        $objPHPExcel->setActiveSheetIndex(0) 
         ->setCellValue('A'.$j, 'Printing Process'); 
        $objPHPExcel->setActiveSheetIndex(0)->setCellValue('B'.$j, $value['printp']); 
        $j++; 
        $objPHPExcel->setActiveSheetIndex(0) 
         ->setCellValue('A'.$j, 'Supplier'); 
        $objPHPExcel->setActiveSheetIndex(0)->setCellValue('B'.$j, $value['prints']); 
        $j++; 
        $objPHPExcel->setActiveSheetIndex(0) 
         ->setCellValue('A'.$j, 'Espon Sub'); 
        $objPHPExcel->setActiveSheetIndex(0)->setCellValue('B'.$j, $value['printsb']); 
        $j++; 
        $objPHPExcel->setActiveSheetIndex(0) 
         ->setCellValue('A'.$j, 'WorkFlow ID'); 
        $objPHPExcel->setActiveSheetIndex(0)->setCellValue('B'.$j, $value['printpr']); 
        $j++; 
        $objPHPExcel->setActiveSheetIndex(0) 
         ->setCellValue('A'.$j, 'Printer'); 
        $objPHPExcel->setActiveSheetIndex(0)->setCellValue('B'.$j, $value['printwrk']); 
        $j++; 
        $objPHPExcel->setActiveSheetIndex(0) 
         ->setCellValue('A'.$j, 'Printing Material'); 
        $objPHPExcel->setActiveSheetIndex(0)->setCellValue('B'.$j, $value['printmat']); 
        $i++; 
        $j++; 
       } 
break; 
       case:downloadp: 

      foreach($print_data as $value) { 

          $objPHPExcel->setActiveSheetIndex(0) 
           ->setCellValue('A'.$j, ''); 
          $objPHPExcel->setActiveSheetIndex(0)->setCellValue('B'.$j, ''); 
          $j++; 
          $objPHPExcel->setActiveSheetIndex(0) 
           ->setCellValue('A'.$j, 'Printing Process'); 
          $objPHPExcel->setActiveSheetIndex(0)->setCellValue('B'.$j, $value['printp']); 
          $j++; 
          $objPHPExcel->setActiveSheetIndex(0) 
           ->setCellValue('A'.$j, 'Supplier'); 
          $objPHPExcel->setActiveSheetIndex(0)->setCellValue('B'.$j, $value['prints']); 
          $j++; 
          $objPHPExcel->setActiveSheetIndex(0) 
           ->setCellValue('A'.$j, 'Espon Sub'); 
          $objPHPExcel->setActiveSheetIndex(0)->setCellValue('B'.$j, $value['printsb']); 
          $j++; 
          $objPHPExcel->setActiveSheetIndex(0) 
           ->setCellValue('A'.$j, 'WorkFlow ID'); 
          $objPHPExcel->setActiveSheetIndex(0)->setCellValue('B'.$j, $value['printpr']); 
          $j++; 
          $objPHPExcel->setActiveSheetIndex(0) 
           ->setCellValue('A'.$j, 'Printer'); 
          $objPHPExcel->setActiveSheetIndex(0)->setCellValue('B'.$j, $value['printwrk']); 
          $j++; 
          $objPHPExcel->setActiveSheetIndex(0) 
           ->setCellValue('A'.$j, 'Printing Material'); 
          $objPHPExcel->setActiveSheetIndex(0)->setCellValue('B'.$j, $value['printmat']); 
          $i++; 
          $j++; 
         } 
     break;

來源

2017-06-01 heart hacker

您的查詢中沒有'ORDER BY'，因此無法預測哪一個會優先。 – Barmar

如果您只想打印一行，請去掉while循環。 – Barmar

我編輯了我的問題@Barmar可以請你再讀一遍......！ –

在不同情況下更改您的查詢。

switch ($something) { 
    case 'downloadl': 
     $sql = "SELECT post_id,printprocess,printsupply,printesb,printwork,printpri,printmate FROM printtable WHERE post_id=" .$post_id . " AND printprocess = 'Select UserA'"; 
     break; 
    case 'downloadp': 
     $sql = "SELECT post_id,printprocess,printsupply,printesb,printwork,printpri,printmate FROM printtable WHERE post_id=" .$post_id . " AND printprocess = 'Select UserB'"; 
     break; 
} 

$query = $db->sql_query($sql); 
$print_data = array(); 
while($roww = mysqli_fetch_array($query)){ 

    $print_data[] = array(
    'printp' => $roww['printprocess'], 
    'prints' => $roww['printsupply'], 
    'printsb' => $roww['printesb'], 
    'printwrk' => $roww['printwork'], 
    'printpr' => $roww['printpri'], 
    'printmat' => $roww['printmate'], 
    ); 
} 

foreach($print_data as $value) { 

    $objPHPExcel->setActiveSheetIndex(0) 
     ->setCellValue('A'.$j, ''); 
    $objPHPExcel->setActiveSheetIndex(0)->setCellValue('B'.$j, ''); 
    $j++; 
    $objPHPExcel->setActiveSheetIndex(0) 
     ->setCellValue('A'.$j, 'Printing Process'); 
    $objPHPExcel->setActiveSheetIndex(0)->setCellValue('B'.$j, $value['printp']); 
    $j++; 
    $objPHPExcel->setActiveSheetIndex(0) 
     ->setCellValue('A'.$j, 'Supplier'); 
    $objPHPExcel->setActiveSheetIndex(0)->setCellValue('B'.$j, $value['prints']); 
    $j++; 
    $objPHPExcel->setActiveSheetIndex(0) 
     ->setCellValue('A'.$j, 'Espon Sub'); 
    $objPHPExcel->setActiveSheetIndex(0)->setCellValue('B'.$j, $value['printsb']); 
    $j++; 
    $objPHPExcel->setActiveSheetIndex(0) 
     ->setCellValue('A'.$j, 'WorkFlow ID'); 
    $objPHPExcel->setActiveSheetIndex(0)->setCellValue('B'.$j, $value['printpr']); 
    $j++; 
    $objPHPExcel->setActiveSheetIndex(0) 
     ->setCellValue('A'.$j, 'Printer'); 
    $objPHPExcel->setActiveSheetIndex(0)->setCellValue('B'.$j, $value['printwrk']); 
    $j++; 
    $objPHPExcel->setActiveSheetIndex(0) 
     ->setCellValue('A'.$j, 'Printing Material'); 
    $objPHPExcel->setActiveSheetIndex(0)->setCellValue('B'.$j, $value['printmat']); 
    $i++; 
    $j++; 
}

來源

2017-06-01 10:42:21 Barmar

你的情況2應該是'downloadp' – mrid

感謝您的努力@Barmar，但我想打印這個printprocess（選擇UserA）動態，因爲它可能會改變任何時候當我改變數據庫。 ..我可以使用任何數組函數這是可能的..？？ –

@mrid ya downloadp是case2我提到case2而不是downloadp sry我的錯誤\ –

使用LIMIT 1

SELECT post_id,printprocess,printsupply,printesb,printwork,printpri,printmate FROM printtable WHERE post_id=" .$post_id." LIMIT 1";

來源

2017-06-01 10:14:14

MySQL沒有'TOP 1'它使用'LIMIT 1' – Barmar

謝謝。 @Barmar –

他改變了這個問題。他希望在不同的'case'塊中有不同的行。 – Barmar

使用此查詢：

$sql = "SELECT post_id,printprocess,printsupply,printesb,printwork,printpri,printmate FROM printtable WHERE post_id=" .$post_id . " ORDER BY pid LIMIT 1";

這裏ORDER BY post_id將返回在POST_ID的升序（默認）輸出

和LIMIT 1將限制行數返回到1.

來源

2017-06-01 10:14:17 mrid

他只選擇一個'post_id'，爲什麼你需要按同一個列排序？ – Barmar

謝謝你指出，我的壞。必須通過pid（似乎是自動生成的主鍵）而不是post_id進行排序。更新了我的答案。 – mrid

你見過這個問題的編輯嗎？他希望在'case'下載''中選擇UserA'並在'case'下載''中選擇UserB'。 – Barmar

我認爲問題出在數據庫中，因爲您的post_id不是唯一值，所以您需要從表中提取2個或更多值。我會重新設計數據庫，或者您可以使用：

$sql = "SELECT post_id,printprocess,printsupply,printesb,printwork,printpri,printmate FROM printtable WHERE post_id=" .$post_id LIMIT 1;

從資料庫拉一個值，或者從你的代碼中刪除

foreach($print as $value)

打印的第一個值。

來源

2017-06-01 10:21:31 frankiehf

如何從數組中打印特定值？

回答

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