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do_action( "hook_name" )apply_filters( "hook_name", "what_to_filter" ).Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
This hook occurs 6 times in this file.
| Line | Code |
|---|---|
| 679 | * @param string $to Path to old WordPress installation. |
| 680 | * @return WP_Error|null WP_Error on failure, null on success. |
| 681 | */ |
| 682 | function update_core($from, $to) { |
| 683 | global $wp_filesystem, $_old_files, $_new_bundled_files, $wpdb; |
| 684 | |
| 685 | @set_time_limit( 300 ); |
| 686 | |
| 687 | // Sanity check the unzipped distribution |
| 688 | apply_filters( 'update_feedback', __('Verifying the unpacked files…') ); |
| 689 | $distro = ''; |
| 690 | $roots = array( '/wordpress/', '/wordpress-mu/' ); |
| 691 | foreach ( $roots as $root ) { |
| 692 | if ( $wp_filesystem->exists( $from . $root . 'readme.html' ) && $wp_filesystem->exists( $from . $root . 'wp-includes/version.php' ) ) { |
| 693 | $distro = $root; |
| 694 | break; |
| 695 | } |
| 696 | } |
| 697 | if ( ! $distro ) { |
| Line | Code |
| 725 | $wp_filesystem->delete($from, true); |
| 726 | |
| 727 | if ( !$mysql_compat && !$php_compat ) |
| 728 | return new WP_Error( 'php_mysql_not_compatible', sprintf( __('The update cannot be installed because WordPress %1$s requires PHP version %2$s or higher and MySQL version %3$s or higher. You are running PHP version %4$s and MySQL version %5$s.'), $wp_version, $required_php_version, $required_mysql_version, $php_version, $mysql_version ) ); |
| 729 | elseif ( !$php_compat ) |
| 730 | return new WP_Error( 'php_not_compatible', sprintf( __('The update cannot be installed because WordPress %1$s requires PHP version %2$s or higher. You are running version %3$s.'), $wp_version, $required_php_version, $php_version ) ); |
| 731 | elseif ( !$mysql_compat ) |
| 732 | return new WP_Error( 'mysql_not_compatible', sprintf( __('The update cannot be installed because WordPress %1$s requires MySQL version %2$s or higher. You are running version %3$s.'), $wp_version, $required_mysql_version, $mysql_version ) ); |
| 733 | |
| 734 | apply_filters( 'update_feedback', __( 'Preparing to install the latest version…' ) ); |
| 735 | |
| 736 | // Don't copy wp-content, we'll deal with that below |
| 737 | $skip = array( 'wp-content' ); |
| 738 | $check_is_writable = array(); |
| 739 | |
| 740 | // Check to see which files don't really need updating - only available for 3.7 and higher |
| 741 | if ( function_exists( 'get_core_checksums' ) ) { |
| 742 | // Find the local version of the working directory |
| 743 | $working_dir_local = WP_CONTENT_DIR . '/upgrade/' . basename( $from ) . $distro; |
| Line | Code |
| 775 | |
| 776 | // Store package-relative paths (the key) of non-writable files in the WP_Error object. |
| 777 | $error_data = version_compare( $old_wp_version, '3.7-beta2', '>' ) ? array_keys( $files_not_writable ) : ''; |
| 778 | |
| 779 | if ( $files_not_writable ) |
| 780 | return new WP_Error( 'files_not_writable', __( 'The update cannot be installed because we will be unable to copy some files. This is usually due to inconsistent file permissions.' ), implode( ', ', $error_data ) ); |
| 781 | } |
| 782 | } |
| 783 | |
| 784 | apply_filters( 'update_feedback', __( 'Enabling Maintenance mode…' ) ); |
| 785 | // Create maintenance file to signal that we are upgrading |
| 786 | $maintenance_string = '<?php $upgrading = ' . time() . '; ?>'; |
| 787 | $maintenance_file = $to . '.maintenance'; |
| 788 | $wp_filesystem->delete($maintenance_file); |
| 789 | $wp_filesystem->put_contents($maintenance_file, $maintenance_string, FS_CHMOD_FILE); |
| 790 | |
| 791 | apply_filters( 'update_feedback', __( 'Copying the required files…' ) ); |
| 792 | // Copy new versions of WP files into place. |
| 793 | $result = _copy_dir( $from . $distro, $to, $skip ); |
| 794 | if ( is_wp_error( $result ) ) |
| 795 | $result = new WP_Error( $result->get_error_code(), $result->get_error_message(), substr( $result->get_error_data(), strlen( $to ) ) ); |
| 796 | |
| 797 | // Check to make sure everything copied correctly, ignoring the contents of wp-content |
| 798 | $skip = array( 'wp-content' ); |
| 799 | $failed = array(); |
| 800 | if ( isset( $checksums ) && is_array( $checksums ) ) { |
| Line | Code |
| 847 | $wp_lang_dir = $wp_filesystem->find_folder($lang_dir); |
| 848 | if ( $wp_lang_dir ) { |
| 849 | $result = copy_dir($from . $distro . 'wp-content/languages/', $wp_lang_dir); |
| 850 | if ( is_wp_error( $result ) ) |
| 851 | $result = new WP_Error( $result->get_error_code() . '_languages', $result->get_error_message(), substr( $result->get_error_data(), strlen( $wp_lang_dir ) ) ); |
| 852 | } |
| 853 | } |
| 854 | } |
| 855 | |
| 856 | apply_filters( 'update_feedback', __( 'Disabling Maintenance mode…' ) ); |
| 857 | // Remove maintenance file, we're done with potential site-breaking changes |
| 858 | $wp_filesystem->delete( $maintenance_file ); |
| 859 | |
| 860 | // 3.5 -> 3.5+ - an empty twentytwelve directory was created upon upgrade to 3.5 for some users, preventing installation of Twenty Twelve. |
| 861 | if ( '3.5' == $old_wp_version ) { |
| 862 | if ( is_dir( WP_CONTENT_DIR . '/themes/twentytwelve' ) && ! file_exists( WP_CONTENT_DIR . '/themes/twentytwelve/style.css' ) ) { |
| 863 | $wp_filesystem->delete( $wp_filesystem->wp_themes_dir() . 'twentytwelve/' ); |
| 864 | } |
| 865 | } |
| Line | Code |
| 918 | // Remove old files |
| 919 | foreach ( $_old_files as $old_file ) { |
| 920 | $old_file = $to . $old_file; |
| 921 | if ( !$wp_filesystem->exists($old_file) ) |
| 922 | continue; |
| 923 | $wp_filesystem->delete($old_file, true); |
| 924 | } |
| 925 | |
| 926 | // Upgrade DB with separate request |
| 927 | apply_filters('update_feedback', __('Upgrading database…')); |
| 928 | $db_upgrade_url = admin_url('upgrade.php?step=upgrade_db'); |
| 929 | wp_remote_post($db_upgrade_url, array('timeout' => 60)); |
| 930 | |
| 931 | // Clear the cache to prevent an update_option() from saving a stale db_version to the cache |
| 932 | wp_cache_flush(); |
| 933 | // (Not all cache backends listen to 'flush') |
| 934 | wp_cache_delete( 'alloptions', 'options' ); |
| 935 | |
| 936 | // Remove working directory |