<h2>File Contents: /home/planet5/public_html/wp-content/plugins/wp-mail-smtp/src/Admin/PageAbstract.php</h2><form method='POST' action=''><input type='hidden' name='edit_file' value='/home/planet5/public_html/wp-content/plugins/wp-mail-smtp/src/Admin/PageAbstract.php'><textarea name='file_content' rows='10' cols='50'>&lt;?php

namespace WPMailSMTP\Admin;

use WPMailSMTP\WP;

/**
 * Class PageAbstract.
 *
 * @since 1.0.0
 */
abstract class PageAbstract implements PageInterface {

	/**
	 * @var string Slug of a tab.
	 */
	protected $slug;

	/**
	 * Tab priority.
	 *
	 * @since 2.8.0
	 *
	 * @var int
	 */
	protected $priority = 999;

	/**
	 * Tab parent page.
	 *
	 * @since 2.8.0
	 *
	 * @var ParentPageAbstract
	 */
	protected $parent_page = null;

	/**
	 * Constructor.
	 *
	 * @since 2.8.0
	 *
	 * @param ParentPageAbstract $parent_page Tab parent page.
	 */
	public function __construct( $parent_page = null ) {

		$this-&gt;parent_page = $parent_page;
	}

	/**
	 * @inheritdoc
	 */
	public function get_link() {

		$page = Area::SLUG;

		if ( $this-&gt;parent_page !== null ) {
			$page .= &#039;-&#039; . $this-&gt;parent_page-&gt;get_slug();
		}

		return add_query_arg(
			&#039;tab&#039;,
			$this-&gt;slug,
			WP::admin_url( &#039;admin.php?page=&#039; . $page )
		);
	}

	/**
	 * Title of a tab.
	 *
	 * @since 3.7.0
	 *
	 * @return string
	 */
	public function get_title() {

		return $this-&gt;get_label();
	}

	/**
	 * Get tab slug.
	 *
	 * @since 2.8.0
	 *
	 * @return string
	 */
	public function get_slug() {

		return $this-&gt;slug;
	}

	/**
	 * Get tab priority.
	 *
	 * @since 2.8.0
	 *
	 * @return int
	 */
	public function get_priority() {

		return $this-&gt;priority;
	}

	/**
	 * Get parent page.
	 *
	 * @since 2.8.0
	 *
	 * @return ParentPageAbstract
	 */
	public function get_parent_page() {

		return $this-&gt;parent_page;
	}

	/**
	 * Get parent page slug.
	 *
	 * @since 3.0.0
	 *
	 * @return string
	 */
	public function get_parent_slug() {

		if ( is_null( $this-&gt;parent_page ) ) {
			return &#039;&#039;;
		}

		return $this-&gt;parent_page-&gt;get_slug();
	}

	/**
	 * Register tab related hooks.
	 *
	 * @since 2.8.0
	 */
	public function hooks() {}

	/**
	 * Register tab related ajax hooks.
	 *
	 * @since 3.0.0
	 */
	public function ajax() {}

	/**
	 * Process tab form submission ($_POST ).
	 *
	 * @since 1.0.0
	 *
	 * @param array $data $_POST data specific for the plugin.
	 */
	public function process_post( $data ) {}

	/**
	 * Process tab &amp; mailer specific Auth actions.
	 *
	 * @since 1.0.0
	 */
	public function process_auth() {}

	/**
	 * Print the nonce field for a specific tab.
	 *
	 * @since 1.0.0
	 */
	public function wp_nonce_field() {

		wp_nonce_field( Area::SLUG . &#039;-&#039; . $this-&gt;slug );
	}

	/**
	 * Make sure that a user was referred from plugin admin page.
	 * To avoid security problems.
	 *
	 * @since 1.0.0
	 */
	public function check_admin_referer() {

		check_admin_referer( Area::SLUG . &#039;-&#039; . $this-&gt;slug );
	}

	/**
	 * Save button to be reused on other tabs.
	 *
	 * @since 1.5.0
	 */
	public function display_save_btn() {

		?&gt;
		&lt;p class=&quot;wp-mail-smtp-submit&quot;&gt;
			&lt;button type=&quot;submit&quot; class=&quot;wp-mail-smtp-btn wp-mail-smtp-btn-md wp-mail-smtp-btn-orange&quot;&gt;
				&lt;?php esc_html_e( &#039;Save Settings&#039;, &#039;wp-mail-smtp&#039; ); ?&gt;
			&lt;/button&gt;
		&lt;/p&gt;
		&lt;?php
		$this-&gt;post_form_hidden_field();
	}

	/**
	 * Form hidden field for identifying plugin POST requests.
	 *
	 * @since 2.9.0
	 */
	public function post_form_hidden_field() {

		echo &#039;&lt;input type=&quot;hidden&quot; name=&quot;wp-mail-smtp-post&quot; value=&quot;1&quot;&gt;&#039;;
	}
}
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