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@tommcfarlin
Created Feb 13, 2019
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[WordPress] WordPress Widgets: Refactoring, Part 10
<?php
/**
* If the value for the key exists in the current instance of the widget, then it will
* retrieve it. Otherwise, it will return an empty value.
*
* @param string $key the used to identify the value of the widget.
* @param array $instance the options for the instance of this widget
*/
protected function get($key, $instance)
{
return empty($instance[$key]) ? '' : $instance[$key];
}
<?php
/*
* This file is part of WordPress Widget Boilerplate
* (c) Tom McFarlin <tom@tommcfarlin.com>
*
* This source file is subject to the GPL license that is bundled
* with this source code in the file LICENSE.
*/
?>
<div class="widget-content">
<p>
<input
type="text"
id="<?php echo esc_attr($this->get_field_id('title')); ?>"
name="<?php echo esc_attr($this->get_field_name('title')); ?>"
value="<?php echo $this->get('title', $instance) ?>"
placeholder="Widget Title"
class="widefat"
/>
</p>
<p>
<textarea
id="<?php echo esc_attr($this->get_field_id('content')); ?>"
name="<?php echo esc_attr($this->get_field_name('content')); ?>"
placeholder="Widget Content"
style="width:100%;"><?php echo $this->get('content', $instance) ?></textarea>
</p>
<p>
<input
type="checkbox"
value="on"
name="<?php echo esc_attr($this->get_field_name('display-title')); ?>"
id="<?php echo esc_attr($this->get_field_id('display-title')); ?>"
<?php checked('on', $this->get('display-title', $instance), true); ?>
class="checkbox"
/>
<label for="<?php echo esc_attr($this->get_field_id('display-title')); ?>">Display Title?</label>
</p>
</div><!-- .widget-content -->
<?php
/*
* This file is part of WordPress Widget Boilerplate
* (c) Tom McFarlin <tom@tommcfarlin.com>
*
* This source file is subject to the GPL license that is bundled
* with this source code in the file LICENSE.
*/
namespace WordPressWidgetBoilerplate\WordPress;
/**
* Santiizes and saves the data for the widget.
*/
class WidgetSerializer
{
/**
* Updates the values of the widget. Sanitizes the information before saving it.
*
* @param array $newInstance the array of new options to save
*/
public function update($newInstance)
{
$instance = [];
foreach ($newInstance as $key => $value) {
$instance[$key] = strip_tags(
stripslashes($value)
);
}
return $instance;
}
}
<?php
/*
* This file is part of WordPress Widget Boilerplate
* (c) Tom McFarlin <tom@tommcfarlin.com>
*
* This source file is subject to the GPL license that is bundled
* with this source code in the file LICENSE.
*/
namespace WordPressWidgetBoilerplate\WordPress;
use WP_Widget;
class Widget extends WP_Widget
{
/**
* @var string unique identifier for your widget
*/
protected $widgetSlug;
/**
* Initializes the plugin by setting its properties and calling the parent class with the description.
*
* @param string $widgetSlug unique identifier for your widget
* @param WidgetSerializer $widgetSerializer the class responsible for saving widget options
*/
public function __construct($widgetSlug)
{
$this->widgetSlug = $widgetSlug;
parent::__construct(
$this->getWidgetSlug(),
__('Widget Name', $this->getWidgetSlug()),
[
'classname' => $this->getWidgetSlug().'-class',
'description' => __('Short description of the widget goes here.', $this->getWidgetSlug()),
]
);
}
/**
* Return the widget slug.
*
* @return string slug variable
*/
public function getWidgetSlug()
{
return $this->widgetSlug;
}
/**
* Displays the administrative view of the form and includes the options
* for the instance of the widget as arguments passed into the function.
*
* @param array $instance the options for the instance of this widget
*/
public function form($instance)
{
include plugin_dir_path(__FILE__).'Views/Admin.php';
}
/**
* Updates the values of the widget. Uses the serialization class to sanitize the
* information before saving it.
*
* @param array $newInstance the values to be sanitized and saved
* @param array $oldInstance the values that were originally saved
*/
public function update($newInstance, $oldInstance)
{
return $this->widgetSerializer->update($newInstance, $oldInstance);
}
/**
* If the value for the key exists in the current instance of the widget, then it will
* retrieve it. Otherwise, it will return an empty value.
*
* @param string $key the used to identify the value of the widget
* @param array $instance the options for the instance of this widget
*/
protected function get($key, $instance)
{
return empty($instance[$key]) ? '' : $instance[$key];
}
}
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