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_unzip_file_ziparchive ( $file, $to, $needed_dirs = array() )
_unzip_file_ziparchive: 该函数用于使用ZipArchive库来解压缩文件。它用于从一个压缩档案中提取文件。
试使用ZipArchive类解压缩存档
不应直接调用此函数,请改用`unzip_file()`。
假设已经调用并设置了WP_Filesystem()。
function _unzip_file_ziparchive( $file, $to, $needed_dirs = array() ) { global $wp_filesystem; $z = new ZipArchive(); $zopen = $z->open( $file, ZIPARCHIVE::CHECKCONS ); if ( true !== $zopen ) { return new WP_Error( 'incompatible_archive', __( 'Incompatible Archive.' ), array( 'ziparchive_error' => $zopen ) ); } $uncompressed_size = 0; for ( $i = 0; $i < $z->numFiles; $i++ ) { $info = $z->statIndex( $i ); if ( ! $info ) { return new WP_Error( 'stat_failed_ziparchive', __( 'Could not retrieve file from archive.' ) ); } if ( '__MACOSX/' === substr( $info['name'], 0, 9 ) ) { // Skip the OS X-created __MACOSX directory. continue; } // Don't extract invalid files: if ( 0 !== validate_file( $info['name'] ) ) { continue; } $uncompressed_size += $info['size']; $dirname = dirname( $info['name'] ); if ( '/' === substr( $info['name'], -1 ) ) { // Directory. $needed_dirs[] = $to . untrailingslashit( $info['name'] ); } elseif ( '.' !== $dirname ) { // Path to a file. $needed_dirs[] = $to . untrailingslashit( $dirname ); } } /* * disk_free_space() could return false. Assume that any falsey value is an error. * A disk that has zero free bytes has bigger problems. * Require we have enough space to unzip the file and copy its contents, with a 10% buffer. */ if ( wp_doing_cron() ) { $available_space = function_exists( 'disk_free_space' ) ? @disk_free_space( WP_CONTENT_DIR ) : false; if ( $available_space && ( $uncompressed_size * 2.1 ) > $available_space ) { return new WP_Error( 'disk_full_unzip_file', __( 'Could not copy files. You may have run out of disk space.' ), compact( 'uncompressed_size', 'available_space' ) ); } } $needed_dirs = array_unique( $needed_dirs ); foreach ( $needed_dirs as $dir ) { // Check the parent folders of the folders all exist within the creation array. if ( untrailingslashit( $to ) === $dir ) { // Skip over the working directory, we know this exists (or will exist). continue; } if ( strpos( $dir, $to ) === false ) { // If the directory is not within the working directory, skip it. continue; } $parent_folder = dirname( $dir ); while ( ! empty( $parent_folder ) && untrailingslashit( $to ) !== $parent_folder && ! in_array( $parent_folder, $needed_dirs, true ) ) { $needed_dirs[] = $parent_folder; $parent_folder = dirname( $parent_folder ); } } asort( $needed_dirs ); // Create those directories if need be: foreach ( $needed_dirs as $_dir ) { // Only check to see if the Dir exists upon creation failure. Less I/O this way. if ( ! $wp_filesystem->mkdir( $_dir, FS_CHMOD_DIR ) && ! $wp_filesystem->is_dir( $_dir ) ) { return new WP_Error( 'mkdir_failed_ziparchive', __( 'Could not create directory.' ), $_dir ); } } unset( $needed_dirs ); for ( $i = 0; $i < $z->numFiles; $i++ ) { $info = $z->statIndex( $i ); if ( ! $info ) { return new WP_Error( 'stat_failed_ziparchive', __( 'Could not retrieve file from archive.' ) ); } if ( '/' === substr( $info['name'], -1 ) ) { // Directory. continue; } if ( '__MACOSX/' === substr( $info['name'], 0, 9 ) ) { // Don't extract the OS X-created __MACOSX directory files. continue; } // Don't extract invalid files: if ( 0 !== validate_file( $info['name'] ) ) { continue; } $contents = $z->getFromIndex( $i ); if ( false === $contents ) { return new WP_Error( 'extract_failed_ziparchive', __( 'Could not extract file from archive.' ), $info['name'] ); } if ( ! $wp_filesystem->put_contents( $to . $info['name'], $contents, FS_CHMOD_FILE ) ) { return new WP_Error( 'copy_failed_ziparchive', __( 'Could not copy file.' ), $info['name'] ); } } $z->close(); return true; }