PHP _unzip_file_ziparchive函数代码示例

/**
 * Unzips a specified ZIP file to a location on the Filesystem via the WordPress Filesystem Abstraction.
 * Assumes that WP_Filesystem() has already been called and set up. Does not extract a root-level __MACOSX directory, if present.
 *
 * Attempts to increase the PHP Memory limit to 256M before uncompressing,
 * However, The most memory required shouldn't be much larger than the Archive itself.
 *
 * @since 2.5.0
 *
 * @global WP_Filesystem_Base $wp_filesystem Subclass
 *
 * @param string $file Full path and filename of zip archive
 * @param string $to Full path on the filesystem to extract archive to
 * @return mixed WP_Error on failure, True on success
 */
function unzip_file($file, $to) {
	global $wp_filesystem;

	if ( ! $wp_filesystem || !is_object($wp_filesystem) )
		return new WP_Error('fs_unavailable', __('Could not access filesystem.'));

	// Unzip can use a lot of memory, but not this much hopefully
	/** This filter is documented in wp-admin/admin.php */
	@ini_set( 'memory_limit', apply_filters( 'admin_memory_limit', WP_MAX_MEMORY_LIMIT ) );

	$needed_dirs = array();
	$to = trailingslashit($to);

	// Determine any parent dir's needed (of the upgrade directory)
	if ( ! $wp_filesystem->is_dir($to) ) { //Only do parents if no children exist
		$path = preg_split('![/\\\]!', untrailingslashit($to));
		for ( $i = count($path); $i >= 0; $i-- ) {
			if ( empty($path[$i]) )
				continue;

			$dir = implode('/', array_slice($path, 0, $i+1) );
			if ( preg_match('!^[a-z]:$!i', $dir) ) // Skip it if it looks like a Windows Drive letter.
				continue;

			if ( ! $wp_filesystem->is_dir($dir) )
				$needed_dirs[] = $dir;
			else
				break; // A folder exists, therefor, we dont need the check the levels below this
		}
	}

	/**
	 * Filter whether to use ZipArchive to unzip archives.
	 *
	 * @since 3.0.0
	 *
	 * @param bool $ziparchive Whether to use ZipArchive. Default true.
	 */
	if ( class_exists( 'ZipArchive' ) && apply_filters( 'unzip_file_use_ziparchive', true ) ) {
		$result = _unzip_file_ziparchive($file, $to, $needed_dirs);
		if ( true === $result ) {
			return $result;
		} elseif ( is_wp_error($result) ) {
			if ( 'incompatible_archive' != $result->get_error_code() )
				return $result;
		}
	}
	// Fall through to PclZip if ZipArchive is not available, or encountered an error opening the file.
	return _unzip_file_pclzip($file, $to, $needed_dirs);
}

/**
 * Unzip's a specified ZIP file to a location
 *
 * @param string $file Full path of the zip file
 * @param string $to Full path where it is going to be unzipped
 * @return int
 */
function osc_unzip_file($file, $to)
{
    if (!file_exists($to)) {
        if (!@mkdir($to, 0766)) {
            return 0;
        }
    }
    @chmod($to, 0777);
    if (!is_writable($to)) {
        return 0;
    }
    if (class_exists('ZipArchive')) {
        return _unzip_file_ziparchive($file, $to);
    }
    // if ZipArchive class doesn't exist, we use PclZip
    return _unzip_file_pclzip($file, $to);
}