wp_cron_preload_cache() │ WPSCache 1.0
Hooks from the function
Return
null. Nothing.
Usage
wp_cron_preload_cache();
Code of wp_cron_preload_cache() wp cron preload cache WPSCache 1.8
function wp_cron_preload_cache() {
global $wpdb, $wp_cache_preload_interval, $wp_cache_preload_posts, $wp_cache_preload_email_me, $wp_cache_preload_email_volume, $cache_path, $wp_cache_preload_taxonomies;
if ( get_option( 'preload_cache_stop' ) ) {
delete_option( 'preload_cache_stop' );
wp_cache_debug( 'wp_cron_preload_cache: preload cancelled', 1 );
return true;
}
$mutex = $cache_path . "preload_mutex.tmp";
sleep( 3 + mt_rand( 1, 5 ) );
if ( @file_exists( $mutex ) ) {
if ( @filemtime( $mutex ) > ( time() - 600 ) ) {
wp_cache_debug( 'wp_cron_preload_cache: preload mutex found and less than 600 seconds old. Aborting preload.', 1 );
return true;
} else {
wp_cache_debug( 'wp_cron_preload_cache: old preload mutex found and deleted. Preload continues.', 1 );
@unlink( $mutex );
}
}
$fp = @fopen( $mutex, 'w' );
@fclose( $fp );
$counter = get_option( 'preload_cache_counter' );
if ( is_array( $counter ) == false ) {
wp_cache_debug( 'wp_cron_preload_cache: setting up preload for the first time!', 5 );
$counter = array( 'c' => 0, 't' => time() );
update_option( 'preload_cache_counter', $counter );
}
$c = $counter[ 'c' ];
update_option( 'preload_cache_counter', array( 'c' => ( $c + 100 ), 't' => time() ) );
if ( $wp_cache_preload_email_volume == 'none' && $wp_cache_preload_email_me == 1 ) {
$wp_cache_preload_email_me = 0;
wp_cache_setting( 'wp_cache_preload_email_me', 0 );
}
if ( $wp_cache_preload_email_me && $c == 0 )
wp_mail( get_option( 'admin_email' ), sprintf( __( '[%1$s] Cache Preload Started', 'wp-super-cache' ), home_url(), '' ), ' ' );
if ( $wp_cache_preload_posts == 'all' || $c < $wp_cache_preload_posts ) {
wp_cache_debug( 'wp_cron_preload_cache: doing taxonomy preload.', 5 );
$permalink_counter_msg = $cache_path . "preload_permalink.txt";
if ( isset( $wp_cache_preload_taxonomies ) && $wp_cache_preload_taxonomies ) {
$taxonomies = apply_filters( 'wp_cache_preload_taxonomies', array( 'post_tag' => 'tag', 'category' => 'category' ) );
foreach( $taxonomies as $taxonomy => $path ) {
$taxonomy_filename = $cache_path . "taxonomy_" . $taxonomy . ".txt";
if ( $c == 0 )
@unlink( $taxonomy_filename );
if ( false == @file_exists( $taxonomy_filename ) ) {
$out = '';
$records = get_terms( $taxonomy );
foreach( $records as $term ) {
$out .= get_term_link( $term ). "\n";
}
$fp = fopen( $taxonomy_filename, 'w' );
if ( $fp ) {
fwrite( $fp, $out );
fclose( $fp );
}
$details = explode( "\n", $out );
} else {
$details = explode( "\n", file_get_contents( $taxonomy_filename ) );
}
if ( count( $details ) != 1 && $details[ 0 ] != '' ) {
$rows = array_splice( $details, 0, 50 );
if ( $wp_cache_preload_email_me && $wp_cache_preload_email_volume == 'many' )
wp_mail( get_option( 'admin_email' ), sprintf( __( '[%1$s] Refreshing %2$s taxonomy from %3$d to %4$d', 'wp-super-cache' ), home_url(), $taxonomy, $c, ($c+100) ), 'Refreshing: ' . print_r( $rows, 1 ) );
foreach( (array)$rows as $url ) {
set_time_limit( 60 );
if ( $url == '' )
continue;
$url_info = parse_url( $url );
$dir = get_supercache_dir() . $url_info[ 'path' ];
wp_cache_debug( "wp_cron_preload_cache: delete $dir", 5 );
prune_super_cache( $dir );
$fp = @fopen( $permalink_counter_msg, 'w' );
if ( $fp ) {
@fwrite( $fp, "$taxonomy: $url" );
@fclose( $fp );
}
wp_remote_get( $url, array('timeout' => 60, 'blocking' => true ) );
wp_cache_debug( "wp_cron_preload_cache: fetched $url", 5 );
sleep( 1 );
if ( @file_exists( $cache_path . "stop_preload.txt" ) ) {
wp_cache_debug( 'wp_cron_preload_cache: cancelling preload. stop_preload.txt found.', 5 );
@unlink( $mutex );
@unlink( $cache_path . "stop_preload.txt" );
@unlink( $taxonomy_filename );
update_option( 'preload_cache_counter', array( 'c' => 0, 't' => time() ) );
if ( $wp_cache_preload_email_me )
wp_mail( get_option( 'admin_email' ), sprintf( __( '[%1$s] Cache Preload Stopped', 'wp-super-cache' ), home_url(), '' ), ' ' );
return true;
}
}
$fp = fopen( $taxonomy_filename, 'w' );
if ( $fp ) {
fwrite( $fp, implode( "\n", $details ) );
fclose( $fp );
}
}
}
}
}
if ( $wp_cache_preload_posts == 'all' || $c < $wp_cache_preload_posts ) {
$types = wpsc_get_post_types();
$posts = $wpdb->get_col( $wpdb->prepare( "SELECT ID FROM {$wpdb->posts} WHERE ( post_type IN ( $types ) ) AND post_status = 'publish' ORDER BY ID DESC LIMIT %d, 100", $c ) );
wp_cache_debug( "wp_cron_preload_cache: got 100 posts from position $c.", 5 );
} else {
wp_cache_debug( "wp_cron_preload_cache: no more posts to get. Limit ($wp_cache_preload_posts) reached.", 5 );
$posts = false;
}
if ( !isset( $wp_cache_preload_email_volume ) )
$wp_cache_preload_email_volume = 'medium';
if ( $posts ) {
if ( get_option( 'show_on_front' ) == 'page' ) {
$page_on_front = get_option( 'page_on_front' );
$page_for_posts = get_option( 'page_for_posts' );
} else {
$page_on_front = $page_for_posts = 0;
}
if ( $wp_cache_preload_email_me && $wp_cache_preload_email_volume == 'many' )
wp_mail( get_option( 'admin_email' ), sprintf( __( '[%1$s] Refreshing posts from %2$d to %3$d', 'wp-super-cache' ), home_url(), $c, ($c+100) ), ' ' );
$msg = '';
$count = $c + 1;
$permalink_counter_msg = $cache_path . "preload_permalink.txt";
foreach( $posts as $post_id ) {
set_time_limit( 60 );
if ( $page_on_front != 0 && ( $post_id == $page_on_front || $post_id == $page_for_posts ) )
continue;
$url = get_permalink( $post_id );
if ( wp_cache_is_rejected( $url ) ) {
wp_cache_debug( "wp_cron_preload_cache: skipped $url per rejected strings setting" );
continue;
}
clear_post_supercache( $post_id );
$fp = @fopen( $permalink_counter_msg, 'w' );
if ( $fp ) {
@fwrite( $fp, $count . " " . $url );
@fclose( $fp );
}
if ( @file_exists( $cache_path . "stop_preload.txt" ) ) {
wp_cache_debug( 'wp_cron_preload_cache: cancelling preload. stop_preload.txt found.', 5 );
@unlink( $mutex );
@unlink( $cache_path . "stop_preload.txt" );
update_option( 'preload_cache_counter', array( 'c' => 0, 't' => time() ) );
if ( $wp_cache_preload_email_me )
wp_mail( get_option( 'admin_email' ), sprintf( __( '[%1$s] Cache Preload Stopped', 'wp-super-cache' ), home_url(), '' ), ' ' );
return true;
}
$msg .= "$url\n";
wp_remote_get( $url, array('timeout' => 60, 'blocking' => true ) );
wp_cache_debug( "wp_cron_preload_cache: fetched $url", 5 );
sleep( 1 );
$count++;
}
if ( $wp_cache_preload_email_me && ( $wp_cache_preload_email_volume == 'medium' || $wp_cache_preload_email_volume == 'many' ) )
wp_mail( get_option( 'admin_email' ), sprintf( __( '[%1$s] %2$d posts refreshed', 'wp-super-cache' ), home_url(), ($c+100) ), __( "Refreshed the following posts:", 'wp-super-cache' ) . "\n$msg" );
if ( defined( 'DOING_CRON' ) ) {
wp_cache_debug( 'wp_cron_preload_cache: scheduling the next preload in 30 seconds.', 5 );
wp_schedule_single_event( time() + 30, 'wp_cache_preload_hook' );
}
wpsc_delete_files( get_supercache_dir() );
} else {
$msg = '';
update_option( 'preload_cache_counter', array( 'c' => 0, 't' => time() ) );
if ( (int)$wp_cache_preload_interval && defined( 'DOING_CRON' ) ) {
if ( $wp_cache_preload_email_me )
$msg = sprintf( __( 'Scheduling next preload refresh in %d minutes.', 'wp-super-cache' ), (int)$wp_cache_preload_interval );
wp_cache_debug( "wp_cron_preload_cache: no more posts. scheduling next preload in $wp_cache_preload_interval minutes.", 5 );
wp_schedule_single_event( time() + ( (int)$wp_cache_preload_interval * 60 ), 'wp_cache_full_preload_hook' );
}
global $file_prefix, $cache_max_time;
if ( $wp_cache_preload_interval > 0 ) {
$cache_max_time = (int)$wp_cache_preload_interval * 60; // fool the GC into expiring really old files
} else {
$cache_max_time = 86400; // fool the GC into expiring really old files
}
if ( $wp_cache_preload_email_me )
wp_mail( get_option( 'admin_email' ), sprintf( __( '[%s] Cache Preload Completed', 'wp-super-cache' ), home_url() ), __( "Cleaning up old supercache files.", 'wp-super-cache' ) . "\n" . $msg );
if ( $cache_max_time > 0 ) { // GC is NOT disabled
wp_cache_debug( "wp_cron_preload_cache: clean expired cache files older than $cache_max_time seconds.", 5 );
wp_cache_phase2_clean_expired( $file_prefix, true ); // force cleanup of old files.
}
}
@unlink( $mutex );
}