Question

我想要使用PHPExcel将一些SQL数据传递给Excel文档。

共有3个表格：

书籍：

1.1 bookID

1.2 bookName
标签：

2.1 tagID

2.2 tagName
Post_Tags：

3.1 id

3.2 tagID

3.3 bookID

我希望标签位于xls工作表的第二列，用逗号分隔。所以我在while循环中有一个while循环。

问题：

在制作的Excel工作表中，并非所有书籍标签都列在每个B列的单元格中，而只列在一个标签中。

任何想法为什么？在此先感谢：）

require_once "includes/config.php";
require_once "includes/functions.php";
require_once 'phptoxls/PHPExcel.php';

// Create new PHPExcel object
$objPHPExcel = new PHPExcel();
$F = $objPHPExcel -> getActiveSheet();


/*      START: RECORDS      */

$line = 2;
$query = mysql_query('SELECT * FROM `books`') or die(mysql_error());
while($row = mysql_fetch_assoc($query)){

$bookID = $row['bookID'];
$bookName = $row['bookName'];

$query2 = mysql_query('SELECT * FROM `books`
                    INNER JOIN `post_tags`
                    ON post_tags.bookID = books.bookID
                    INNER JOIN `tags`
                    ON tags.tagID = post_tags.tagID
                    WHERE books.bookID = "'.$bookID.'"') or die(mysql_error());

if(mysql_num_rows($query2) > 0){
    $rowNum = mysql_num_rows($query2);
    $i = 1;
    while($row1 = mysql_fetch_assoc($query2)){
        $tags = $row1['tagName'];
        if($i < $rowNum){
            $tags .= ', ';
        }
    }
}

    $F  -> setCellValue('A'.$line, $bookName)
        -> setCellValue('B'.$line, $tags);

    ++$line;
}

/*      END: RECORDS        */


// Redirect output to a client’s web browser (Excel5)
header('Content-Type: application/vnd.ms-excel');
header('Content-Disposition: attachment;filename="books.xls');
header('Cache-Control: max-age=0');

$objWriter = PHPExcel_IOFactory::createWriter($objPHPExcel, 'Excel5');
$objWriter->save('php://output');
exit;

Answer 1

这就是你的问题：

while($row1 = mysql_fetch_assoc($query2)){
    $tags = $row1['tagName'];

您正在重置每个循环的$ tag值。要使用您提供的代码，只需执行以下操作：

if(mysql_num_rows($query2) > 0){
    $rowNum = mysql_num_rows($query2);
    $i = 1;
    $tags = "";
    while($row1 = mysql_fetch_assoc($query2)){
        $tags .= $row1['tagName'];
        if($i < $rowNum){
            $tags .= ', ';
        }
    }
}

但我建议您通过这样做来解决问题：

if(mysql_num_rows($query2) > 0){
    while($row1 = mysql_fetch_assoc($query2)){
        $tags[] = $row1['tagName'];
    }
    $tags = implode(', ',$tags);
}

Answer 2

首先请更好地缩进代码，因为它几乎不可读（http://beta.phpformatter.com）。第二：我认为你只是用'，' - s连接标签。在你的第一次开始时认真对待Dude：

<?php
require_once "includes/config.php";
require_once "includes/functions.php";
require_once 'phptoxls/PHPExcel.php';

// Create new PHPExcel object
$objPHPExcel = new PHPExcel();
$F = $objPHPExcel->getActiveSheet();


/*      START: RECORDS      */

$line = 2;
$query = mysql_query('SELECT * FROM `books`') or die(mysql_error());
while ($row = mysql_fetch_assoc($query)) {
    $all_tags_for_one_row = '';
    $bookID = $row['bookID'];
    $bookName = $row['bookName'];

    $query2 = mysql_query('SELECT * FROM `books`
                    INNER JOIN `post_tags`
                    ON post_tags.bookID = books.bookID
                    INNER JOIN `tags`
                    ON tags.tagID = post_tags.tagID
                    WHERE books.bookID = "' . $bookID . '"') or die(mysql_error());

    if (mysql_num_rows($query2) > 0) {
        $rowNum = mysql_num_rows($query2);
        $i = 1;
        while ($row1 = mysql_fetch_assoc($query2)) {
            $tags = $row1['tagName'];
            if ($i < $rowNum) {

                $all_tags_for_one_row .= ($i != $rowNum ? $tags . ', ' : $tags ); 
            }
            $i++;
        }
    }

    $F->setCellValue('A' . $line, $bookName);
    $F->setCellValue('B' . $line, $all_tags_for_one_row);

    ++$line;
}

/*      END: RECORDS        */


// Redirect output to a client’s web browser (Excel5)
header('Content-Type: application/vnd.ms-excel');
header('Content-Disposition: attachment;filename="books.xls');
header('Cache-Control: max-age=0');

$objWriter = PHPExcel_IOFactory::createWriter($objPHPExcel, 'Excel5');
$objWriter->save('php://output');
exit;
?>

PHPExcel |虽然循环内部循环不能正常工作

2 个答案: