在PHP中，封装协议（Wrapper Protocols）是一种允许你以类似于文件操作的方式访问各种资源（如HTTP、FTP、文件系统等）的机制。PHP提供了多种内置的封装协议，以下是一些常见的类型：
file:///path/to/file.txthttp://example.com/file.txthttp://，但使用HTTPS协议进行加密传输。https://example.com/file.txtftp://user:password@example.com/file.txtftp://，但使用FTPS协议进行加密传输。ftps://user:password@example.com/file.txtphp://input, php://output, php://memory, php://tempdata://text/plain;base64,SGVsbG8gd29ybGQ=glob:///path/to/files/*.txtphar:///path/to/archive.phar/file.txtzip:///path/to/archive.zip#file.txtcompress.zlib:///path/to/file.gzcompress.bzip2:///path/to/file.bz2ssh2.shell://user:password@example.comssh2.exec://user:password@example.comssh2.tunnel://user:password@example.comrar:///path/to/archive.rar#file.txtogg:///path/to/file.oggexpect://commandzlib:///path/to/file.gzbzip2:///path/to/file.bz2ssh2.sftp://user:password@example.com/path/to/file.txtssh2.scp://user:password@example.com/path/to/file.txtssh2.exec://user:password@example.comssh2.tunnel://user:password@example.comssh2.shell://user:password@example.comssh2.sftp://user:password@example.com/path/to/file.txtssh2.scp://user:password@example.com/path/to/file.txtssh2.exec://user:password@example.comssh2.tunnel://user:password@example.comssh2.shell://user:password@example.comssh2.sftp://user:password@example.com/path/to/file.txtssh2.scp://user:password@example.com/path/to/file.txtssh2.exec://user:password@example.comssh2.tunnel://user:password@example.comssh2.shell://user:password@example.comssh2.sftp://user:password@example.com/path/to/file.txtssh2.scp://user:password@example.com/path/to/file.txtssh2.exec://user:password@example.comssh2.tunnel://user:password@example.comssh2.shell://user:password@example.comssh2.sftp://user:password@example.com/path/to/file.txtssh2.scp://user:password@example.com/path/to/file.txtssh2.exec://user:password@example.comssh2.tunnel://user:password@example.comssh2.shell://user:password@example.comssh2.sftp://user:password@example.com/path/to/file.txtssh2.scp://user:password@example.com/path/to/file.txtssh2.exec://user:password@example.comssh2.tunnel://user:password@example.comssh2.shell://user:password@example.comssh2.sftp://user:password@example.com/path/to/file.txtssh2.scp://user:password@example.com/path/to/file.txtssh2.exec://user:password@example.comssh2.tunnel://user:password@example.comssh2.shell://user:password@example.comssh2.sftp://user:password@example.com/path/to/file.txtssh2.scp://user:password@example.com/path/to/file.txtssh2.exec://user:password@example.comssh2.tunnel://user:password@example.comssh2.shell://user:password@example.comssh2.sftp://user:password@example.com/path/to/file.txtssh2.scp://user:password@example.com/path/to/file.txtssh2.exec://user:password@example.comssh2.tunnel://user:password@example.comssh2.shell://user:password@example.comssh2.sftp://user:password@example.com/path/to/file.txtssh2.scp://user:password@example.com/path/to/file.txtssh2.exec://user:password@example.com