mysql_fetch_array 只返回查询的最后一个值[重复]

Question

基本上我想为我的项目制作一个下载按钮，该按钮将在内存中生成不同的 csv 文件（每个表一个 csv 文件）并在下载前压缩。它工作正常，但问题是我在每个mysql_fetch_array 上只得到一行（最后一个结果），它应该根据数据库中存储的行数返回行。此代码已被贬值，对此深表歉意。

这是我的代码：

<?php  

require("../includes/connection.php");
require("../includes/myLib.php");
//get the ID that is passed
$ID = $_REQUEST['q'];
$ID = xdec($ID);

//All queries to fetch data  
$query  = mysql_query("SELECT * FROM `ge2`.`projects` WHERE `projects`.`proj_id`='$ID'");
$query2 = mysql_query("SELECT * FROM `ge2`.`attributes` WHERE `attributes`.`proj_id`='$ID'");
$query3 = mysql_query("SELECT * FROM `ge2`.`category` WHERE `category`.`proj_id`='$ID'");
$query4 = mysql_query("SELECT * FROM `ge2`.`multipletarget` WHERE `multipletarget`.`proj_id`='$ID'");
$query5 = mysql_query("SELECT * FROM `ge2`.`data_cut` WHERE `data_cut`.`proj_id`='$ID'");
$query6 = mysql_query("SELECT * FROM `ge2`.`raw` WHERE `raw`.`proj_id`='$ID'");

//getting all array
while ($row = mysql_fetch_array($query)) {

    $proj_alias = $row['proj_alias'];
    $proj_id    = $row['proj_id'];
    $date_added = $row['date_added'];        
}

while ($row1 = mysql_fetch_array($query2)) {

    $attrib_param_id = $row1['param_id'];
    $attrib_proj_id  = $row1['proj_id'];
    $attrib_cat_id = $row1['cat_id'];
    $attrib_val_id = $row1['val_id'];
    $attrib_name   = $row1['name'];
    $attrib_isCust = $row1['isCust'];        
}

while ($row2 = mysql_fetch_array($query3)) {

    $category_cat_id = $row2['cat_id'];
    $category_name = $row2['name'];
    $category_proj_id = $row2['proj_id'];
    $category_desc = $row2['desc'];
}

while ($row3 = mysql_fetch_array($query4)) {

    $multipletarget_id = $row3['id'];
    $multipletarget_proj_id = $row3['proj_id'];
    $multipletarget_mtarget1 = $row3['mtarget1'];
    $multipletarget_mtarget2 = $row3['mtarget2'];
}

while ($row4 = mysql_fetch_array($query5)) {

    $data_cut_id      = $row4['id'];
    $data_cut_proj_id = $row4['proj_id'];
    $data_cut_name  = $row4['name'];
    $data_cut_param = $row4['param'];
    $data_cut_lvl = $row4['lvl'];
    $data_cut_val = $row4['val'];
}

while ($row5 = mysql_fetch_array($query6)) {

    $raw_id      = $row5['raw_id'];
    $raw_proj_id = $row5['proj_id'];
    $raw_p_id = $row5['p_id'];
    $raw_url  = $row5['url'];
    $raw_ip   = $row5['ip'];
    $raw_pos  = $row5['pos'];
    $raw_datetaken = $row5['datetaken'];
    $raw_used   = $row5['used'];
    $raw_fdc_id = $row5['fdc_id'];
    $raw_dq     = $row5['dq'];
}

// some data to be used in the csv files
$records = array(
    $proj_alias, $proj_id, $date_added
);
$records2 = array(
    $attrib_param_id, $attrib_proj_id, $attrib_cat_id, $attrib_val_id, $attrib_name, $attrib_isCust
);

$records3 = array(
    $category_cat_id, $category_name, $category_proj_id, $category_desc
);
$records4 = array(
    $multipletarget_id, $multipletarget_proj_id, $multipletarget_mtarget1, $multipletarget_mtarget2
);
$records5 = array(
    $data_cut_id, $data_cut_proj_id, $data_cut_name, $data_cut_param,$data_cut_lvl,$data_cut_val
);
$records6 = array(
    $raw_id, $raw_proj_id, $raw_p_id, $raw_url,$raw_ip,$raw_pos,$raw_datetaken,$raw_used,$raw_fdc_id,$raw_dq
);
//making an array to be used in loop     
$set = array($records,$records2,$records3,$records4,$records5,$records6);
//names to be named for each csv file      
$names = array('projects', 'attributes', 'category', 'multipletarget', 'data_cut', 'raw');

// create zip file
$zipname = $proj_alias;
$zip = new ZipArchive;
$zip->open($zipname, ZipArchive::CREATE);

// loop to create csv files
$n = 0;
foreach ($set as $setk => $sets) {
    $n += 1;
    $fd = fopen('php://temp/maxmemory:1048576', 'w');
    if (false === $fd) {
        die('Failed to create temporary file');
    }

    fputcsv($fd, $sets);

    // return to the start of the stream
    rewind($fd);

    // add the in-memory file to the archive, giving a name
    $zip->addFromString('BrainLink-' . $proj_alias . "-" . $names[$setk] . '.csv', stream_get_contents($fd));
    //close the file
    fclose($fd);
}
// close the archive
$zip->close();


header('Content-Type: application/zip');
header('Content-disposition: attachment; filename='.$zipname.'.zip');
header('Content-Length: ' . filesize($zipname));
readfile($zipname);

// remove the zip archive
// you could also use the temp file method above for this.
unlink($zipname);  
?>

提前致谢。

Answer 1

好吧，您似乎在独立地迭代所有查询结果并一遍又一遍地覆盖变量。所以最后，您只能使用最后一个表格结果。

您可以尝试在 MySQL 中使用 JOIN 或 UNION SELECT 来获取一个大查询结果行中的所有项目：

$query = mysql_query('SELECT proj.*, attrs.* 
FROM `projects` AS proj
JOIN `attributes` AS attrs ON (attrs.project_id=proj.project_id)
<..more tables to join in the same manner..>
WHERE proj.`proj_id`= ' . $projectId);

然后，您只需要迭代单个查询资源。

while ($row = mysql_fetch_array($query)) {
//your code here
}

请注意，如果JOIN'ed 的表具有相同的列名，它们将“覆盖”彼此，您必须自己“即时”重命名它们。

像这样：

SELECT proj.field, proj.another_field, proj.conflicting_field_name AS unique_field_name

Answer 2

我没有阅读您的所有代码，但在每个 while 循环中，您只保存最后一条记录。应该是这样的。

while($row = mysql_fetch_array($query)){   

            $proj_alias[] = $row['proj_alias'];
            $proj_id[] = $row['proj_id'];
            $date_added[] = $row['date_added'];        
  }

还有其他类似的。