Question

我正在尝试将mysql查询导出到csv。我有它工作，唯一的事情是它没有把空场放在那里。我把它们分开管道，|。我需要能够下载查询并将其上传到其他地方，所以我需要它来导出空字段。这是我目前的出口代码：

<?php


$from = $_REQUEST['from'];
$to = $_REQUEST['to'];
$filename = "APGE_ELEC_" . $to;
header('Content-Disposition: attachment; filename="'.$filename.'".csv"');

    $hostname = ""; //SET SERVER/HOSTNAME
    $dbusername = ""; //SET DATABASE USERNAME
    $dbname = ""; //SET DATABASE NAME
    $dbpassword = ""; //SET DATABASE USERNAME

$dbhandle = mysql_connect($hostname, $dbusername, $dbpassword) 
  or die("Unable to connect to MySQL");

$selected = mysql_select_db($dbname,$dbhandle) 
  or die("Could not select Data Base");


$query = "SELECT * FROM v88374 WHERE date >= DATE_FORMAT('" . $from . "', '%Y%m%d') AND date <=  DATE_FORMAT('" . $to . "', '%Y%m%d')";


$export = mysql_query ($query ) or die ( "Sql error : " . mysql_error( ) );

$fields = mysql_num_fields ( $export );

for ( $i = 0; $i < $fields; $i++ )
{
    $header .= mysql_field_name( $export , $i ) ."|" . "\t";
}

while( $row = mysql_fetch_row( $export ) )
{
    $line = '';
    foreach( $row as $value )
    {                                            
        if ( ( !isset( $value ) ) || ( $value == "" ) )
        {
            $value = "\t";
        }
        else
        {
            $value = str_replace( '"' , '""' , $value );
            $value = $value . '|' . "\t";
        }
        $line .= $value;
    }
    $data .= trim( $line ) . "\n";
}
$data = str_replace( "\r" , "" , $data );

if ( $data == "" )
{
    $data = "\n(0) Records Found!\n"; 

}

print "$header\n$data";


exit();


?>

我希望它不是一个巨大的修复。我感谢任何帮助。谢谢。

Answer 1

为什么不简单地做

SELECT whatever
FROM your_table
INTO OUTFILE '/directory/file.csv'
FIELDS TERMINATED BY '|'
ENCLOSED BY '"'
LINES TERMINATED BY '\n'

来自manual：

...如果MySQL客户端软件安装在远程计算机上，您可以改为使用客户端命令，例如mysql -e“SELECT ...”＆gt; file_name在客户端主机上生成文件

Answer 2

要使用fputcsv，请尝试以下方法：

$fp = fopen('your_file_name.csv','w');
fputcsv($fp,$fields,'|'); // add in your header row
while( $row = mysql_fetch_row( $export ) )
{
    if($row != NULL)
        fputcsv($fp,$row,'|'); // Each row is already an array, so you just need to export it here
}
fclose($fp);

Answer 3

我认为错误就在这里：

    if ( ( !isset( $value ) ) || ( $value == "" ) )
    {
        $value = "\t";
    }
    else
    {
        $value = str_replace( '"' , '""' , $value );
        $value = $value . '|' . "\t";
    }
    $line .= $value;

当$ value为空时，你将它设为一个标签并在没有管道的情况下添加它，else语句中的内容不会被执行。

此外，您的查询也存在严重的安全问题，因此除非仅供个人使用，并且对查询有一定的卫生条件。

$from = mysql_real_escape_string($_REQUEST['from']);
$to = mysql_real_escape_string($_REQUEST['to']);

将MYSQL导出为CSV，留下空字段

3 个答案: