php – 导出到csv wordpress

发布时间：2020-12-13 18:21:40 所属栏目：PHP教程来源：网络整理

导读：我需要在csv文件中的一个表中导出数据.我能够很好地获取数据,但浏览器不会生成CSV文件. 我的代码是这样的：它的标题问题.我只得到输出与逗号分隔值但不获取csv文件. /* Converting data to CSV */public function CSV_GENERATE($getTable){ ob_clean(); glob

我需要在csv文件中的一个表中导出数据.我能够很好地获取数据,但浏览器不会生成CSV文件.

我的代码是这样的：它的标题问题.我只得到输出与逗号分隔值但不获取csv文件.

/* Converting data to CSV */

public function CSV_GENERATE($getTable)
{
    ob_clean();
    global $wpdb;
    $field='';
    $getField ='';

    if($getTable){
        $result = $wpdb->get_results("SELECT * FROM $getTable");
        $requestedTable = mysql_query("SELECT * FROM ".$getTable);
        // echo "hey";die;//var_dump($result);die;

        $fieldsCount = mysql_num_fields($requestedTable);

        for($i=0; $i<$fieldsCount; $i++){
            $field = mysql_fetch_field($requestedTable);
            $field = (object) $field;         
            $getField .= $field->name.',';
        }

        $sub = substr_replace($getField,'',-1);
        $fields = $sub; # GET FIELDS NAME
        $each_field = explode(',',$sub);
        $csv_file_name = $getTable.'_'.date('Ymd_His').'.csv'; 
        # CSV FILE NAME WILL BE table_name_yyyymmdd_hhmmss.csv

        # GET FIELDS VALUES WITH LAST COMMA EXCLUDED
        foreach($result as $row){
            for($j = 0; $j < $fieldsCount; $j++){
                if($j == 0) $fields .= "n"; # FORCE NEW LINE IF LOOP COMPLETE
                $value = str_replace(array("n","nr","rn","r"),"t",$row->$each_field[$j]); # REPLACE NEW LINE WITH TAB
                $value = str_getcsv ( $value,",""",""); # SEQUENCING DATA IN CSV FORMAT,REQUIRED PHP >= 5.3.0
                $fields .= $value[0].','; # SEPARATING FIELDS WITH COMMA
            }
            $fields = substr_replace($fields,-1); # REMOVE EXTRA SPACE AT STRING END
        }

        header("Content-type: text/x-csv"); # DECLARING FILE TYPE
        header("Content-Transfer-Encoding: binary");
        header("Content-Disposition: attachment; filename=".$csv_file_name); # EXPORT GENERATED CSV FILE
        header("Pragma: no-cache");
        header("Expires: 0"); 
        header("Content-type: application/x-msdownload");
        //header("Content-Disposition: attachment; filename=data.csv");

        return $fields; 
    }

这现在完美地运作了.我们可以将它用作插件.我修改了 this帖子.感谢sruthi sri.

希望这有助于一些:)

<?php

class CSVExport
{
/**
* Constructor
*/
public function __construct()
{
if(isset($_GET['download_report']))
{
$csv = $this->generate_csv();

header("Pragma: public");
header("Expires: 0");
header("Cache-Control: must-revalidate,post-check=0,pre-check=0");
header("Cache-Control: private",false);
header("Content-Type: application/octet-stream");
header("Content-Disposition: attachment; filename="report.csv";" );
header("Content-Transfer-Encoding: binary");

echo $csv;
exit;
}

// Add extra menu items for admins
add_action('admin_menu',array($this,'admin_menu'));

// Create end-points
add_filter('query_vars','query_vars'));
add_action('parse_request','parse_request'));
}

/**
* Add extra menu items for admins
*/
public function admin_menu()
{
add_menu_page('Download Report','Download Report','manage_options','download_report','download_report'));
}

/**
* Allow for custom query variables
*/
public function query_vars($query_vars)
{
$query_vars[] = 'download_report';
return $query_vars;
}

/**
* Parse the request
*/
public function parse_request(&$wp)
{
if(array_key_exists('download_report',$wp->query_vars))
{
$this->download_report();
exit;
}
}

/**
* Download report
*/
public function download_report()
{
echo '<div class="wrap">';
echo '<div id="icon-tools" class="icon32">
</div>';
echo '<h2>Download Report</h2>';
//$url = site_url();

echo '<p>Export the Subscribers';
}

/**
* Converting data to CSV
*/
public function generate_csv()
{
$csv_output = '';
$table = 'users';

$result = mysql_query("SHOW COLUMNS FROM ".$table."");

$i = 0;
if (mysql_num_rows($result) > 0) {
while ($row = mysql_fetch_assoc($result)) {
$csv_output = $csv_output . $row['Field'].",";
$i++;
}
}
$csv_output .= "n";

$values = mysql_query("SELECT * FROM ".$table."");
while ($rowr = mysql_fetch_row($values)) {
for ($j=0;$j<$i;$j++) {
$csv_output .= $rowr[$j].",";
}
$csv_output .= "n";
}

return $csv_output;
}
}

// Instantiate a singleton of this plugin
$csvExport = new CSVExport();

（编辑：李大同）

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