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set_transient example
/*=======================================================================*\ Function: set Purpose: add an item to the cache, keyed on url Input: url from which the rss file was fetched Output: true on success \*=======================================================================*/
function set ($url, $rss) {
$cache_option = 'rss_' . $this->file_name( $url );
set_transient($cache_option, $rss, $this->MAX_AGE);
return $cache_option;
}
/*=======================================================================*\ Function: get Purpose: fetch an item from the cache Input: url from which the rss file was fetched Output: cached object on HIT, false on MISS \*=======================================================================*/
function get ($url) {
return new WP_Error( 'unable_to_write', __( 'Unable to write to file.' ) );
}
wp_opcache_invalidate( $real_file, true );
if ( $is_active && 'php' === $extension ) {
$scrape_key = md5( rand() );
$transient = 'scrape_key_' . $scrape_key;
$scrape_nonce = (string) rand();
// It shouldn't take more than 60 seconds to make the two loopback requests. set_transient( $transient, $scrape_nonce, 60 );
$cookies = wp_unslash( $_COOKIE );
$scrape_params = array(
'wp_scrape_key' => $scrape_key,
'wp_scrape_nonce' => $scrape_nonce,
);
$headers = array(
'Cache-Control' => 'no-cache',
);
/** This filter is documented in wp-includes/class-wp-http-streams.php */
}
wp_opcache_invalidate( $real_file, true );
if ( $is_active && 'php' === $extension ) {
$scrape_key = md5( rand() );
$transient = 'scrape_key_' . $scrape_key;
$scrape_nonce = (string) rand();
// It shouldn't take more than 60 seconds to make the two loopback requests. set_transient( $transient, $scrape_nonce, 60 );
$cookies = wp_unslash( $_COOKIE );
$scrape_params = array(
'wp_scrape_key' => $scrape_key,
'wp_scrape_nonce' => $scrape_nonce,
);
$headers = array(
'Cache-Control' => 'no-cache',
);
/** This filter is documented in wp-includes/class-wp-http-streams.php */
/** Only check at this interval for new messages. */
if ( ! defined( 'WP_MAIL_INTERVAL' ) ) {
define( 'WP_MAIL_INTERVAL', 5 * MINUTE_IN_SECONDS );
}
$last_checked = get_transient( 'mailserver_last_checked' );
if ( $last_checked ) {
wp_die( __( 'Slow down cowboy, no need to check for new mails so often!' ) );
}
set_transient( 'mailserver_last_checked', true, WP_MAIL_INTERVAL );
$time_difference = get_option( 'gmt_offset' ) * HOUR_IN_SECONDS;
$phone_delim = '::';
$pop3 = new POP3();
if ( ! $pop3->connect( get_option( 'mailserver_url' ), get_option( 'mailserver_port' ) ) || ! $pop3->user( get_option( 'mailserver_login' ) ) ) {
wp_die( esc_html( $pop3->ERROR ) );
}
if ( ! defined( 'WP_MAIL_INTERVAL' ) ) {
define( 'WP_MAIL_INTERVAL', 5 * MINUTE_IN_SECONDS );
}
$last_checked = get_transient( 'mailserver_last_checked' );
if ( $last_checked ) {
wp_die( __( 'Slow down cowboy, no need to check for new mails so often!' ) );
}
set_transient( 'mailserver_last_checked', true, WP_MAIL_INTERVAL );
$time_difference = get_option( 'gmt_offset' ) * HOUR_IN_SECONDS;
$phone_delim = '::';
$pop3 = new POP3();
if ( ! $pop3->connect( get_option( 'mailserver_url' ), get_option( 'mailserver_port' ) ) || ! $pop3->user( get_option( 'mailserver_login' ) ) ) {
wp_die( esc_html( $pop3->ERROR ) );
}
/* * Handle settings errors and return to options page. */
// If no settings errors were registered add a general 'updated' message. if ( ! count( get_settings_errors() ) ) {
add_settings_error( 'general', 'settings_updated', __( 'Settings saved.' ), 'success' );
}
set_transient( 'settings_errors', get_settings_errors(), 30 ); // 30 seconds.
// Redirect back to the settings page that was submitted. $goback = add_query_arg( 'settings-updated', 'true', wp_get_referer() );
wp_redirect( $goback );
exit;
}
require_once ABSPATH . 'wp-admin/admin-header.php';
?> <div class="wrap"> <h1>
<?php
require_once ABSPATH . 'wp-admin/admin-footer.php';
exit;
} else {
$plugins_to_delete = count( $plugins );
} // End if verify-delete.
$delete_result = delete_plugins( $plugins );
// Store the result in a cache rather than a URL param due to object type & length. set_transient( 'plugins_delete_result_' . $user_ID, $delete_result );
wp_redirect( self_admin_url( "plugins.php?deleted=$plugins_to_delete&plugin_status=$status&paged=$page&s=$s" ) );
exit;
case 'clear-recent-list':
if ( ! is_network_admin() ) {
update_option( 'recently_activated', array() );
} else {
update_site_option( 'recently_activated', array() );
}
break;
case 'resume':
require_once ABSPATH . 'wp-admin/admin-footer.php';
exit;
} else {
$plugins_to_delete = count( $plugins );
} // End if verify-delete.
$delete_result = delete_plugins( $plugins );
// Store the result in a cache rather than a URL param due to object type & length. set_transient( 'plugins_delete_result_' . $user_ID, $delete_result );
wp_redirect( self_admin_url( "plugins.php?deleted=$plugins_to_delete&plugin_status=$status&paged=$page&s=$s" ) );
exit;
case 'clear-recent-list':
if ( ! is_network_admin() ) {
update_option( 'recently_activated', array() );
} else {
update_site_option( 'recently_activated', array() );
}
break;
case 'resume':
$ttl = apply_filters( 'rest_oembed_ttl', DAY_IN_SECONDS, $url, $args );
set_transient( $cache_key, $data, $ttl );
return $data;
}
}
$doing_cron_transient = get_transient( 'doing_cron' );
// Use global $doing_wp_cron lock, otherwise use the GET lock. If no lock, try to grab a new lock. if ( empty( $doing_wp_cron ) ) {
if ( empty( $_GET['doing_wp_cron'] ) ) {
// Called from external script/job. Try setting a lock. if ( $doing_cron_transient && ( $doing_cron_transient + WP_CRON_LOCK_TIMEOUT > $gmt_time ) ) {
return;
}
$doing_wp_cron = sprintf( '%.22F', microtime( true ) );
$doing_cron_transient = $doing_wp_cron;
set_transient( 'doing_cron', $doing_wp_cron );
} else {
$doing_wp_cron = $_GET['doing_wp_cron'];
}
}
/* * The cron lock (a unix timestamp set when the cron was spawned), * must match $doing_wp_cron (the "key"). */
if ( $doing_cron_transient !== $doing_wp_cron ) {
return;
}
// Use global $doing_wp_cron lock, otherwise use the GET lock. If no lock, try to grab a new lock. if ( empty( $doing_wp_cron ) ) {
if ( empty( $_GET['doing_wp_cron'] ) ) {
// Called from external script/job. Try setting a lock. if ( $doing_cron_transient && ( $doing_cron_transient + WP_CRON_LOCK_TIMEOUT > $gmt_time ) ) {
return;
}
$doing_wp_cron = sprintf( '%.22F', microtime( true ) );
$doing_cron_transient = $doing_wp_cron;
set_transient( 'doing_cron', $doing_wp_cron );
} else {
$doing_wp_cron = $_GET['doing_wp_cron'];
}
}
/* * The cron lock (a unix timestamp set when the cron was spawned), * must match $doing_wp_cron (the "key"). */
if ( $doing_cron_transient !== $doing_wp_cron ) {
return;
}
/* * Ignore transient cache when the development mode is set to 'core'. Why? To avoid interfering with * the core developer's workflow. */
if ( ! wp_is_development_mode( 'core' ) ) {
$transient_name = 'wp_core_block_css_files';
$files = get_transient( $transient_name );
if ( ! $files ) {
$files = glob( wp_normalize_path( __DIR__ . '/**/**.css' ) );
set_transient( $transient_name, $files );
}
} else {
$files = glob( wp_normalize_path( __DIR__ . '/**/**.css' ) );
}
$register_style = static function( $name, $filename, $style_handle ) use ( $includes_path, $includes_url, $suffix, $wp_styles, $files ) {
$style_path = "blocks/{$name}/{$filename}{$suffix}.css";
$path = wp_normalize_path( $includes_path . $style_path );
if ( ! in_array( $path, $files, true ) ) {
$wp_styles->add(
$attachment_id = (int) $attachment->ID;
$file = get_attached_file( $attachment_id );
$meta = wp_get_attachment_metadata( $attachment_id );
if ( empty( $meta ) && file_exists( $file ) ) {
$_meta = get_post_meta( $attachment_id );
$_lock = 'wp_generating_att_' . $attachment_id;
if ( ! array_key_exists( '_wp_attachment_metadata', $_meta ) && ! get_transient( $_lock ) ) {
set_transient( $_lock, $file );
wp_update_attachment_metadata( $attachment_id, wp_generate_attachment_metadata( $attachment_id, $file ) );
delete_transient( $_lock );
}
}
}
/** * Tries to convert an attachment URL into a post ID. * * @since 4.0.0 * * @global wpdb $wpdb WordPress database abstraction object. * * @param string $url The URL to resolve. * @return int The found post ID, or 0 on failure. */
function is_multi_author() {
global $wpdb;
$is_multi_author = get_transient( 'is_multi_author' );
if ( false === $is_multi_author ) {
$rows = (array) $wpdb->get_col( "SELECT DISTINCT post_author FROM $wpdb->posts WHERE post_type = 'post' AND post_status = 'publish' LIMIT 2" );
$is_multi_author = 1 < count( $rows ) ? 1 : 0;
set_transient( 'is_multi_author', $is_multi_author );
}
/** * Filters whether the site has more than one author with published posts. * * @since 3.2.0 * * @param bool $is_multi_author Whether $is_multi_author should evaluate as true. */
return apply_filters( 'is_multi_author', (bool) $is_multi_author );
}
function wp_ajax_health_check_site_status_result() {
check_ajax_referer( 'health-check-site-status-result' );
if ( ! current_user_can( 'view_site_health_checks' ) ) {
wp_send_json_error();
}
set_transient( 'health-check-site-status-result', wp_json_encode( $_POST['counts'] ) );
wp_send_json_success();
}
/** * Handles site health check to get directories and database sizes via AJAX. * * @since 5.2.0 * @deprecated 5.6.0 Use WP_REST_Site_Health_Controller::get_directory_sizes() * @see WP_REST_Site_Health_Controller::get_directory_sizes() */
foreach ( $results as $result ) {
if ( 'critical' === $result['status'] ) {
$site_status['critical']++;
} elseif ( 'recommended' === $result['status'] ) {
$site_status['recommended']++;
} else {
$site_status['good']++;
}
}
set_transient( 'health-check-site-status-result', wp_json_encode( $site_status ) );
}
/** * Checks if the current environment type is set to 'development' or 'local'. * * @since 5.6.0 * * @return bool True if it is a development environment, false if not. */
public function is_development_environment() {
return in_array( wp_get_environment_type(), array( 'development', 'local' ), true );
}
if ( 'critical' === $result['status'] ) {
$site_status['critical']++;
} elseif ( 'recommended' === $result['status'] ) {
$site_status['recommended']++;
} else {
$site_status['good']++;
}
}
set_transient( 'health-check-site-status-result', wp_json_encode( $site_status ) );
}
/** * Checks if the current environment type is set to 'development' or 'local'. * * @since 5.6.0 * * @return bool True if it is a development environment, false if not. */
public function is_development_environment() {
return in_array( wp_get_environment_type(), array( 'development', 'local' ), true );
}
function wp_dashboard_plugins_output( $rss, $args = array() ) {
_deprecated_function( __FUNCTION__, '4.8.0' );
// Plugin feeds plus link to install them. $popular = fetch_feed( $args['url']['popular'] );
if ( false === $plugin_slugs = get_transient( 'plugin_slugs' ) ) {
$plugin_slugs = array_keys( get_plugins() );
set_transient( 'plugin_slugs', $plugin_slugs, DAY_IN_SECONDS );
}
echo '<ul>';
foreach ( array( $popular ) as $feed ) {
if ( is_wp_error( $feed ) || ! $feed->get_item_quantity() )
continue;
$items = $feed->get_items(0, 5);
// Pick a random, non-installed plugin.
if ( ! $doing_ajax ) {
echo $loading;
return false;
}
if ( $callback && is_callable( $callback ) ) {
array_unshift( $args, $widget_id, $check_urls );
ob_start();
call_user_func_array( $callback, $args );
// Default lifetime in cache of 12 hours (same as the feeds). set_transient( $cache_key, ob_get_flush(), 12 * HOUR_IN_SECONDS );
}
return true;
}
// // Dashboard Widgets Controls. //
/** * Calls widget control callback. * * @since 2.5.0 * * @global callable[] $wp_dashboard_control_callbacks * * @param int|false $widget_control_id Optional. Registered widget ID. Default false. */
echo $loading;
return false;
}
if ( $callback && is_callable( $callback ) ) {
array_unshift( $args, $widget_id, $check_urls );
ob_start();
call_user_func_array( $callback, $args );
// Default lifetime in cache of 12 hours (same as the feeds). set_transient( $cache_key, ob_get_flush(), 12 * HOUR_IN_SECONDS );
}
return true;
}
// // Dashboard Widgets Controls. //
/** * Calls widget control callback. * * @since 2.5.0 * * @global callable[] $wp_dashboard_control_callbacks * * @param int|false $widget_control_id Optional. Registered widget ID. Default false. */