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目前，我可以使用 PHP 查询 MYSQL 数据库，并且我的数据可以毫无问题地导入 CSV。但是，我需要获取第一行的列数据，并将其放在左侧的行中，并且我需要每列下的数据与正确的行相关联。所以基本上，我需要PHP来转置excel中的数据，就像excel中的转置工具一样。

这是我当前的代码： 

ExportMysqlToCsv($tablename);

function exportMysqlToCsv($tablename,$filename = 'Results.csv')
{
    $csv_terminated = "\n";
    $csv_separator = ",";
    $csv_enclosed = '"';
    $csv_escaped = "\\";
    $sql_query = "select * from $tablename where id=2";

    // Gets the data from the database
    $result = mysql_query($sql_query);
    $fields_cnt = mysql_num_fields($result);

    $schema_insert = '';

    for ($i = 0; $i < $fields_cnt; $i++)
    {
        $l = $csv_enclosed . str_replace($csv_enclosed, $csv_escaped . $csv_enclosed,
            stripslashes(mysql_field_name($result, $i))) . $csv_enclosed;
        $schema_insert .= $l;
        $schema_insert .= $csv_separator;
    } // end for

    $out = trim(substr($schema_insert, 0, -1));
    $out .= $csv_terminated;

    // Format the data
    while ($row = mysql_fetch_array($result))
    {
        $schema_insert = '';
        for ($j = 0; $j < $fields_cnt; $j++)
        {
            if ($row[$j] == '0' || $row[$j] != '')
            {

                if ($csv_enclosed == '')
                {
                    $schema_insert .= $row[$j];
                } else
                {
                    $schema_insert .= $csv_enclosed . 
                    str_replace($csv_enclosed, $csv_escaped . $csv_enclosed, $row[$j]) . $csv_enclosed;
                }
            } else
            {
                $schema_insert .= '';
            }

            if ($j < $fields_cnt - 1)
            {
                $schema_insert .= $csv_separator;
            }
        } // end for

        $out .= $schema_insert;
        $out .= $csv_terminated;
    } // end while


    header("Cache-Control: must-revalidate, post-check=0, pre-check=0");
    header("Content-Length: " . strlen($out));

 // Output to browser with appropriate mime type, you choose ;)
    header("Content-type: text/x-csv");
    header("Content-type: text/csv");
    header("Content-type: application/csv");
    header("Content-Disposition: attachment; filename=$filename");
    echo $out;
    exit;
}
4

1 回答 1

1

首先，这将大大简化您的代码：

function exportMysqlToCsv($tablename,$filename = 'Results.csv')
{
    $sql_query = "select * from $tablename where id=2";

    // Gets the data from the database
    $result = mysql_query($sql_query);

    $f = fopen('php://temp', 'wt');
    $first = true;
    while ($row = mysql_fetch_assoc($result)) {
        if ($first) {
            fputcsv($f, array_keys($row));
            $first = false;
        }
        fputcsv($f, $row);
    } // end while

    $size = ftell($f);
    rewind($f);

    header("Cache-Control: must-revalidate, post-check=0, pre-check=0");
    header("Content-Length: $size");

 // Output to browser with appropriate mime type, you choose ;)
    header("Content-type: text/x-csv");
    header("Content-type: text/csv");
    header("Content-type: application/csv");
    header("Content-Disposition: attachment; filename=$filename");
    fpassthru($f);
    exit;
}

您所追求的是枢轴操作；不幸的是，如果不将所有行读入内存然后应用转换，您将无法做到这一点。

请参阅此处以获取一些灵感。

于 2012-10-12T01:28:43.013 回答