export to csv wordpress
This is working perfectly now. we can use this as a plugin. I modified this post. thanks to sruthi sri.
Hope this helps some one :)
<?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', array($this, 'query_vars'));
add_action('parse_request', array($this, 'parse_request'));
}
/**
* Add extra menu items for admins
*/
public function admin_menu()
{
add_menu_page('Download Report', 'Download Report', 'manage_options', 'download_report', array($this, 'download_report'));
}
/**
* Allow for custom query variables
*/
public function query_vars($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();
I'm a late bloomer, but made a small 'improvement' to the code you guys worked on and would like to share. If code pasted in the main plugin .php file you don't need to go through the 3 steps. Just change the values at the bottom of the script as required. I like to keep it neat though with plenty of comments for you guys.
For beginners who might need this and to add flexibility for everyone to use:
- First add global variable
define('MY_PLUGIN_DIR', plugin_dir_path(__FILE__)); - After that add
require_once(PARTS_MY_PLUGIN_DIR . '/databasestuff/table_to_csv.php') - Under
your_plugin_directory/databasestuff/table_to_csv.phpsave the following class and change the last few lines as required. Make adjustments to the last few lines
class export_table_to_csv{ private $db; private $table_name; private $separator; function __construct($table_n, $sep, $filename){ global $wpdb; //We gonna work with database aren't we? $this->db = $wpdb; //Can't use global on it's own within a class so lets assign it to local object. $this->table_name = $table_n; $this->separator = $sep; $generatedDate = date('d-m-Y His'); //Date will be part of file name. I dont like to see ...(23).csv downloaded $csvFile = $this->generate_csv(); //Getting the text generated to download header("Pragma: public"); header("Expires: 0"); header("Cache-Control: must-revalidate, post-check=0, pre-check=0"); header("Cache-Control: private", false); //Forces the browser to download header("Content-Type: application/octet-stream"); header("Content-Disposition: attachment; filename=\"" . $filename . " " . $generatedDate . ".csv\";" ); header("Content-Transfer-Encoding: binary"); echo $csvFile; //Whatever is echoed here will be in the csv file exit; } function generate_csv(){ $csv_output = ''; //Assigning the variable to store all future CSV file's data $table = $this->db->prefix . $this->table_name; //For flexibility of the plugin and convenience, lets get the prefix $result = $this->db->get_results("SHOW COLUMNS FROM " . $table . ""); //Displays all COLUMN NAMES under 'Field' column in records returned if (count($result) > 0) { foreach($result as $row) { $csv_output = $csv_output . $row->Field . $this->separator; } $csv_output = substr($csv_output, 0, -1); //Removing the last separator, because thats how CSVs work } $csv_output .= "\n"; $values = $this->db->get_results("SELECT * FROM " . $table . ""); //This here foreach ($values as $rowr) { $fields = array_values((array) $rowr); //Getting rid of the keys and using numeric array to get values $csv_output .= implode($this->separator, $fields); //Generating string with field separator $csv_output .= "\n"; //Yeah... } return $csv_output; //Back to constructor } } // Also include nonce check here - https://codex.wordpress.org/WordPress_Nonces if(isset($_POST['processed_values']) && $_POST['processed_values'] == 'download_csv'){ //When we must do this $exportCSV = new export_table_to_csv('table_name',';','report'); //Make your changes on these lines }
Keep in mind:
- Table prefix will be added to the table name.
- This script uses core WordPress functions meaning that the last 3 lines is literally all you have to change for this to work.
Just making some small adjustments to @Developer since it wasn't quite pulling up in the admin, or downloading the csv. But now it will :) :
<?php
/**
* CSV Exporter bootstrap file
*
* This file is read by WordPress to generate the plugin information in the plugin
* admin area. This file also includes all of the dependencies used by the plugin,
* registers the activation and deactivation functions, and defines a function
* that starts the plugin.
*
* @since 1.0.0
* @package CSV Export
*
* @wordpress-plugin
* Plugin Name: CSV Export
* Plugin URI: http://example.com/plugin-name-uri/
* Description: exports csvs derrr
* Version: 1.0.0
* Author: Your Name or Your Company
* Author URI: http://example.com/
* License: GPL-2.0+
* License URI: http://www.gnu.org/licenses/gpl-2.0.txt
* Text Domain: csv-export
* Domain Path: /languages
*/
class CSVExport {
/**
* Constructor
*/
public function __construct() {
if (isset($_GET['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', array($this, 'query_vars'));
add_action('parse_request', array($this, 'parse_request'));
}
/**
* Add extra menu items for admins
*/
public function admin_menu() {
add_menu_page('Download Report', 'Download Report', 'manage_options', 'download_report', array($this, 'download_report'));
}
/**
* Allow for custom query variables
*/
public function query_vars($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>';
echo '<p><a href="?page=download_report&report=users">Export the Subscribers</a></p>';
}
/**
* Converting data to CSV
*/
public function generate_csv() {
$csv_output = '';
$table = 'wp_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();
Just create a file called csv_export.php put it in a plugins/csv_export/ and you're gtg!