<?php

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/**

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* Class for looking up a site's health based on a user's WordPress environment.

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*

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* @package WordPress

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* @subpackage Site_Health

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* @since 5.2.0

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*/

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#[AllowDynamicProperties]

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class WP_Site_Health {

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private static $instance = null;

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private $is_acceptable_mysql_version;

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private $is_recommended_mysql_version;

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public $is_mariadb = false;

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private $mysql_server_version = '';

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private $mysql_required_version = '5.5';

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private $mysql_recommended_version = '8.0';

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private $mariadb_recommended_version = '10.5';

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public $php_memory_limit;

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public $schedules;

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public $crons;

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public $last_missed_cron = null;

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public $last_late_cron = null;

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private $timeout_missed_cron = null;

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private $timeout_late_cron = null;

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/**

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* WP_Site_Health constructor.

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*

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* @since 5.2.0

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*/

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public function __construct() {

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$this->maybe_create_scheduled_event();

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// Save memory limit before it's affected by wp_raise_memory_limit( 'admin' ).

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$this->php_memory_limit = ini_get( 'memory_limit' );

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$this->timeout_late_cron = 0;

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$this->timeout_missed_cron = - 5 * MINUTE_IN_SECONDS;

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if ( defined( 'DISABLE_WP_CRON' ) && DISABLE_WP_CRON ) {

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$this->timeout_late_cron = - 15 * MINUTE_IN_SECONDS;

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$this->timeout_missed_cron = - 1 * HOUR_IN_SECONDS;

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}

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add_filter( 'admin_body_class', array( $this, 'admin_body_class' ) );

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add_action( 'admin_enqueue_scripts', array( $this, 'enqueue_scripts' ) );

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add_action( 'wp_site_health_scheduled_check', array( $this, 'wp_cron_scheduled_check' ) );

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add_action( 'site_health_tab_content', array( $this, 'show_site_health_tab' ) );

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}

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/**

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* Outputs the content of a tab in the Site Health screen.

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*

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* @since 5.8.0

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*

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* @param string $tab Slug of the current tab being displayed.

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*/

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public function show_site_health_tab( $tab ) {

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if ( 'debug' === $tab ) {

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require_once ABSPATH . 'wp-admin/site-health-info.php';

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}

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}

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/**

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* Returns an instance of the WP_Site_Health class, or create one if none exist yet.

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*

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* @since 5.4.0

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*

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* @return WP_Site_Health|null

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*/

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public static function get_instance() {

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if ( null === self::$instance ) {

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self::$instance = new WP_Site_Health();

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}

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return self::$instance;

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}

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/**

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* Enqueues the site health scripts.

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*

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* @since 5.2.0

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*/

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public function enqueue_scripts() {

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$screen = get_current_screen();

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if ( 'site-health' !== $screen->id && 'dashboard' !== $screen->id ) {

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return;

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}

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$health_check_js_variables = array(

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'screen' => $screen->id,

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'nonce' => array(

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'site_status' => wp_create_nonce( 'health-check-site-status' ),

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'site_status_result' => wp_create_nonce( 'health-check-site-status-result' ),

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),

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'site_status' => array(

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'direct' => array(),

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'async' => array(),

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'issues' => array(

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'good' => 0,

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'recommended' => 0,

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'critical' => 0,

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),

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),

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);

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$issue_counts = get_transient( 'health-check-site-status-result' );

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if ( false !== $issue_counts ) {

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$issue_counts = json_decode( $issue_counts );

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$health_check_js_variables['site_status']['issues'] = $issue_counts;

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}

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if ( 'site-health' === $screen->id && ( ! isset( $_GET['tab'] ) || empty( $_GET['tab'] ) ) ) {

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$tests = WP_Site_Health::get_tests();

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// Don't run https test on development environments.

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if ( $this->is_development_environment() ) {

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unset( $tests['async']['https_status'] );

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}

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foreach ( $tests['direct'] as $test ) {

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if ( is_string( $test['test'] ) ) {

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$test_function = sprintf(

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'get_test_%s',

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$test['test']

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);

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if ( method_exists( $this, $test_function ) && is_callable( array( $this, $test_function ) ) ) {

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$health_check_js_variables['site_status']['direct'][] = $this->perform_test( array( $this, $test_function ) );

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continue;

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}

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}

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if ( is_callable( $test['test'] ) ) {

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$health_check_js_variables['site_status']['direct'][] = $this->perform_test( $test['test'] );

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}

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}

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foreach ( $tests['async'] as $test ) {

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if ( is_string( $test['test'] ) ) {

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$health_check_js_variables['site_status']['async'][] = array(

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'test' => $test['test'],

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'has_rest' => ( isset( $test['has_rest'] ) ? $test['has_rest'] : false ),

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'completed' => false,

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'headers' => isset( $test['headers'] ) ? $test['headers'] : array(),

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);

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}

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}

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}

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wp_localize_script( 'site-health', 'SiteHealth', $health_check_js_variables );

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}

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/**

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* Runs a Site Health test directly.

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*

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* @since 5.4.0

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*

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* @param callable $callback

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* @return mixed|void

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*/

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private function perform_test( $callback ) {

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/**

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* Filters the output of a finished Site Health test.

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*

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* @since 5.3.0

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*

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* @param array $test_result {

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* An associative array of test result data.

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*

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* @type string $label A label describing the test, and is used as a header in the output.

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* @type string $status The status of the test, which can be a value of `good`, `recommended` or `critical`.

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* @type array $badge {

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* Tests are put into categories which have an associated badge shown, these can be modified and assigned here.

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*

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* @type string $label The test label, for example `Performance`.

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* @type string $color Default `blue`. A string representing a color to use for the label.

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* }

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* @type string $description A more descriptive explanation of what the test looks for, and why it is important for the end user.

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* @type string $actions An action to direct the user to where they can resolve the issue, if one exists.

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* @type string $test The name of the test being ran, used as a reference point.

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* }

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*/

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return apply_filters( 'site_status_test_result', call_user_func( $callback ) );

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}

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/**

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* Runs the SQL version checks.

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*

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* These values are used in later tests, but the part of preparing them is more easily managed

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* early in the class for ease of access and discovery.

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*

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* @since 5.2.0

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*

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* @global wpdb $wpdb WordPress database abstraction object.

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*/

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private function prepare_sql_data() {

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global $wpdb;

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$mysql_server_type = $wpdb->db_server_info();

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$this->mysql_server_version = $wpdb->get_var( 'SELECT VERSION()' );

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if ( stristr( $mysql_server_type, 'mariadb' ) ) {

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$this->is_mariadb = true;

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$this->mysql_recommended_version = $this->mariadb_recommended_version;

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}

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$this->is_acceptable_mysql_version = version_compare( $this->mysql_required_version, $this->mysql_server_version, '<=' );

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$this->is_recommended_mysql_version = version_compare( $this->mysql_recommended_version, $this->mysql_server_version, '<=' );

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}

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/**

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* Tests whether `wp_version_check` is blocked.

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*

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* It's possible to block updates with the `wp_version_check` filter, but this can't be checked

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* during an Ajax call, as the filter is never introduced then.

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*

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* This filter overrides a standard page request if it's made by an admin through the Ajax call

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* with the right query argument to check for this.

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*

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* @since 5.2.0

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*/

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public function check_wp_version_check_exists() {

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if ( ! is_admin() || ! is_user_logged_in() || ! current_user_can( 'update_core' ) || ! isset( $_GET['health-check-test-wp_version_check'] ) ) {

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return;

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}

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echo ( has_filter( 'wp_version_check', 'wp_version_check' ) ? 'yes' : 'no' );

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die();

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}

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/**

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* Tests for WordPress version and outputs it.

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*

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* Gives various results depending on what kind of updates are available, if any, to encourage

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* the user to install security updates as a priority.

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*

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* @since 5.2.0

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*

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* @return array The test result.

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*/

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public function get_test_wordpress_version() {

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$result = array(

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'label' => '',

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'status' => '',

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'badge' => array(

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'label' => __( 'Performance' ),

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'color' => 'blue',

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),

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'description' => '',

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'actions' => '',

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'test' => 'wordpress_version',

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);

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$core_current_version = get_bloginfo( 'version' );

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$core_updates = get_core_updates();

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if ( ! is_array( $core_updates ) ) {

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$result['status'] = 'recommended';

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$result['label'] = sprintf(

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/* translators: %s: Your current version of WordPress. */

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__( 'WordPress version %s' ),

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$core_current_version

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);

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$result['description'] = sprintf(

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'<p>%s</p>',

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__( 'Unable to check if any new versions of WordPress are available.' )

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);

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$result['actions'] = sprintf(

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'<a href="%s">%s</a>',

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esc_url( admin_url( 'update-core.php?force-check=1' ) ),

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__( 'Check for updates manually' )

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);

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} else {

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foreach ( $core_updates as $core => $update ) {

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if ( 'upgrade' === $update->response ) {

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$current_version = explode( '.', $core_current_version );

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$new_version = explode( '.', $update->version );

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$current_major = $current_version[0] . '.' . $current_version[1];

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$new_major = $new_version[0] . '.' . $new_version[1];

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$result['label'] = sprintf(

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/* translators: %s: The latest version of WordPress available. */

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__( 'WordPress update available (%s)' ),

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$update->version

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);

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$result['actions'] = sprintf(

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'<a href="%s">%s</a>',

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esc_url( admin_url( 'update-core.php' ) ),

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__( 'Install the latest version of WordPress' )

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);

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if ( $current_major !== $new_major ) {

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// This is a major version mismatch.

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$result['status'] = 'recommended';

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$result['description'] = sprintf(

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'<p>%s</p>',

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__( 'A new version of WordPress is available.' )

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);

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} else {

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// This is a minor version, sometimes considered more critical.

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$result['status'] = 'critical';

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$result['badge']['label'] = __( 'Security' );

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$result['description'] = sprintf(

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'<p>%s</p>',

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__( 'A new minor update is available for your site. Because minor updates often address security, it&#8217;s important to install them.' )

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);

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}

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} else {

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$result['status'] = 'good';

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$result['label'] = sprintf(

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/* translators: %s: The current version of WordPress installed on this site. */

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__( 'Your version of WordPress (%s) is up to date' ),

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$core_current_version

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);

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$result['description'] = sprintf(

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'<p>%s</p>',

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__( 'You are currently running the latest version of WordPress available, keep it up!' )

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);

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}

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}

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}

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return $result;

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}

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/**

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* Tests if plugins are outdated, or unnecessary.

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*

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* The test checks if your plugins are up to date, and encourages you to remove any

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* that are not in use.

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*

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* @since 5.2.0

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*

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* @return array The test result.

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*/

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public function get_test_plugin_version() {

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$result = array(

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'label' => __( 'Your plugins are all up to date' ),

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'status' => 'good',

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'badge' => array(

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'label' => __( 'Security' ),

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'color' => 'blue',

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),

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'description' => sprintf(

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'<p>%s</p>',

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__( 'Plugins extend your site&#8217;s functionality with things like contact forms, ecommerce and much more. That means they have deep access to your site, so it&#8217;s vital to keep them up to date.' )

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),

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'actions' => sprintf(

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'<p><a href="%s">%s</a></p>',

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esc_url( admin_url( 'plugins.php' ) ),

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__( 'Manage your plugins' )

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),

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'test' => 'plugin_version',

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);

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$plugins = get_plugins();

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$plugin_updates = get_plugin_updates();

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$plugins_active = 0;

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$plugins_total = 0;

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$plugins_need_update = 0;

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// Loop over the available plugins and check their versions and active state.

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foreach ( $plugins as $plugin_path => $plugin ) {

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++$plugins_total;

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if ( is_plugin_active( $plugin_path ) ) {

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++$plugins_active;

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}

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if ( array_key_exists( $plugin_path, $plugin_updates ) ) {

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++$plugins_need_update;

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}

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}

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// Add a notice if there are outdated plugins.

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if ( $plugins_need_update > 0 ) {

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$result['status'] = 'critical';

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$result['label'] = __( 'You have plugins waiting to be updated' );

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$result['description'] .= sprintf(

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'<p>%s</p>',

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sprintf(

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/* translators: %d: The number of outdated plugins. */

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_n(

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'Your site has %d plugin waiting to be updated.',

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'Your site has %d plugins waiting to be updated.',

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$plugins_need_update

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),

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$plugins_need_update

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)

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);

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$result['actions'] .= sprintf(

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'<p><a href="%s">%s</a></p>',

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esc_url( network_admin_url( 'plugins.php?plugin_status=upgrade' ) ),

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__( 'Update your plugins' )

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);

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} else {

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if ( 1 === $plugins_active ) {

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$result['description'] .= sprintf(

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'<p>%s</p>',

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__( 'Your site has 1 active plugin, and it is up to date.' )

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);

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} elseif ( $plugins_active > 0 ) {

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$result['description'] .= sprintf(

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'<p>%s</p>',

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sprintf(

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/* translators: %d: The number of active plugins. */

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_n(

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'Your site has %d active plugin, and it is up to date.',

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'Your site has %d active plugins, and they are all up to date.',

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$plugins_active

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),

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$plugins_active

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)

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);

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} else {

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$result['description'] .= sprintf(

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'<p>%s</p>',

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__( 'Your site does not have any active plugins.' )

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);

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}

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}

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// Check if there are inactive plugins.

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if ( $plugins_total > $plugins_active && ! is_multisite() ) {

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$unused_plugins = $plugins_total - $plugins_active;

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$result['status'] = 'recommended';

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$result['label'] = __( 'You should remove inactive plugins' );

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$result['description'] .= sprintf(

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'<p>%s %s</p>',

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sprintf(

[455] Fix | Delete

/* translators: %d: The number of inactive plugins. */

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_n(

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'Your site has %d inactive plugin.',

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'Your site has %d inactive plugins.',

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$unused_plugins

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),

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$unused_plugins

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),

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__( 'Inactive plugins are tempting targets for attackers. If you are not going to use a plugin, you should consider removing it.' )

[464] Fix | Delete

);

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$result['actions'] .= sprintf(

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'<p><a href="%s">%s</a></p>',

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esc_url( admin_url( 'plugins.php?plugin_status=inactive' ) ),

[469] Fix | Delete

__( 'Manage inactive plugins' )

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);

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}

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[473] Fix | Delete

return $result;

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}

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[476] Fix | Delete

/**

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* Tests if themes are outdated, or unnecessary.

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*

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* Checks if your site has a default theme (to fall back on if there is a need),

[480] Fix | Delete

* if your themes are up to date and, finally, encourages you to remove any themes

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* that are not needed.

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*

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* @since 5.2.0

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*

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* @return array The test results.

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*/

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public function get_test_theme_version() {

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$result = array(

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'label' => __( 'Your themes are all up to date' ),

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'status' => 'good',

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'badge' => array(

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'label' => __( 'Security' ),

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'color' => 'blue',

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),

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'description' => sprintf(

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'<p>%s</p>',

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__( 'Themes add your site&#8217;s look and feel. It&#8217;s important to keep them up to date, to stay consistent with your brand and keep your site secure.' )

[498] Fix | Delete

),

[499] Fix | Delete