WP Batch Processing is WordPress plugin for creating batches of data and processing the data items one by one. It allows you to define a batch and to process the queued batch items one by one. There is also option to resume/continue later in case your internet connection goes down.
There are two ways to install this library:
-
Install this library as a plugin. It doesn't require anything from below or,
-
Install it as a composer package (read the notes bellow)
composer require gdarko/wp-batch-processing
WP_Batch_Processor::boot();Note: The boot() method should be called only if you install the plugin via composer somewhere in your plugin or theme.
Note: If using composer, the library will attempt to find its path, however if you see messed up screen it means that it was unable to find the stylesheet/JS files and you will need to define them manually before boot() method.
// Manually define the path constants to eliminate
// possible errors when resolving the paths and also
// include trailing slash at the end.
if ( ! defined('WP_BP_PATH')) {
define('WP_BP_PATH', '/path/to/wp-content/plugins/your-plugin/libraries/wp-batch-processing/');
}
if ( ! defined('WP_BP_URL')) {
define('WP_BP_URL', 'https://site.com/wp-content/plugins/your-plugin/libraries/wp-batch-processing/');
}
WP_Batch_Processor::boot();To define a batch you just need to extend the class WP_Batch and later register it. Follow the examples below to learn how.
The class provides the following attributes and methods
$id- Identifies the batch (must be unique),$title- Shown in the admin area,setup()- Method that you use it to fed your data withWP_Batch_Iteminstances,process(WP_Batch_Item $item)- Method that will be used to process each next item in the batch
if ( class_exists( 'WP_Batch' ) ) {
/**
* Class MY_Example_Batch
*/
class MY_Example_Batch extends WP_Batch {
/**
* Unique identifier of each batch
* @var string
*/
public $id = 'email_post_authors';
/**
* Describe the batch
* @var string
*/
public $title = 'Email Post Authors';
/**
* To setup the batch data use the push() method to add WP_Batch_Item instances to the queue.
*
* Note: If the operation of obtaining data is expensive, cache it to avoid slowdowns.
*
* @return void
*/
public function setup() {
$users = get_users( array(
'number' => '40',
'role' => 'author',
) );
foreach ( $users as $user ) {
$this->push( new WP_Batch_Item( $user->ID, array( 'author_id' => $user->ID ) ) );
}
}
/**
* Handles processing of batch item. One at a time.
*
* In order to work it correctly you must return values as follows:
*
* - TRUE - If the item was processed successfully.
* - WP_Error instance - If there was an error. Add message to display it in the admin area.
*
* @param WP_Batch_Item $item
*
* @return bool|\WP_Error
*/
public function process( $item ) {
// Retrieve the custom data
$author_id = $item->get_value( 'author_id' );
// Return WP_Error if the item processing failed (In our case we simply skip author with user id 5)
if ( $author_id == 5 ) {
return new WP_Error( 302, "Author skipped" );
}
// Do the expensive processing here.
// ...
// Return true if the item processing is successful.
return true;
}
/**
* Called when specific process is finished (all items were processed).
* This method can be overriden in the process class.
* @return void
*/
public function finish() {
// Do something after process is finished.
// You have $this->items, etc.
}
}
}After creating the class, class instance needs to be registered in order to be available in the batches list in the admin area.
/**
* Initialize the batches.
*/
function wp_batch_processing_init() {
$batch = new MY_Example_Batch();
WP_Batch_Processor::get_instance()->register( $batch );
}
add_action( 'wp_batch_processing_init', 'wp_batch_processing_init', 15, 1 );That's it.
Set delay between processing items. Default is 0 (no delay)
function wp_bp_my_custom_delay($delay) {
return 2; // in seconds
}
add_filter('wp_batch_processing_delay', 'wp_bp_my_custom_delay', 10, 1);The tool can be used in many different ways. For example
- Importing data
- Downloading data
- Emailing
- Database modifications
If you notice a bug or you want to propose improvements feel free to create a pull request!
The plugin is licensed under GPL v2
Copyright (C) 2021 Darko Gjorgjijoski (https://darkog.com)
This file is part of WP Batch Processing
WP Batch Processing is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 2 of the License, or
(at your option) any later version.
WP Batch Processing is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with WP Batch Processing. If not, see <https://www.gnu.org/licenses/>.
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