Predefined Constants

    The constants below are defined by this extension, and will only be available when the extension has either been compiled into PHP or dynamically loaded at runtime.

    ZipArchive uses class constants. There are various types of constants, main are: Flags (prefixed with FL_), Global flags (prefixed with AFL_), errors (prefixed with ER_) and mode (no prefix).

    Archive open modes
    ZipArchive::CREATE (int)
    Create the archive if it does not exist.
    ZipArchive::OVERWRITE (int)
    If archive exists, ignore its current contents. In other words, handle it the same way as an empty archive.
    ZipArchive::EXCL (int)
    Error if archive already exists.
    ZipArchive::RDONLY (int)
    Open archive in read only mode. Available as of PHP 7.4.3 and PECL zip 1.17.1, respectively, if built against libzip ≥ 1.0.0.
    ZipArchive::CHECKCONS (int)
    Perform additional consistency checks on the archive, and error if they fail.
    Archive global flags
    ZipArchive::AFL_RDONLY (int)
    Archive is read only, cannot be cleared. Available as of PHP 8.3.0 and PECL zip 1.22.0, respectively, if built against libzip ≥ 1.10.0.
    ZipArchive::AFL_IS_TORRENTZIP (int)
    Current archive is torrentzipped. Available as of PHP 8.3.0 and PECL zip 1.22.0, respectively, if built against libzip ≥ 1.10.0.
    ZipArchive::AFL_WANT_TORRENTZIP (int)
    Write archive in torrentzip format. Available as of PHP 8.3.0 and PECL zip 1.22.0, respectively, if built against libzip ≥ 1.10.0.
    ZipArchive::AFL_CREATE_OR_KEEP_FILE_FOR_EMPTY_ARCHIVE (int)
    Don't remove file if archive is empty. Available as of PHP 8.3.0 and PECL zip 1.22.0, respectively, if built against libzip ≥ 1.10.0.
    Archive flags
    ZipArchive::FL_NOCASE (int)
    Ignore case on name lookup
    ZipArchive::FL_NODIR (int)
    Ignore directory component
    ZipArchive::FL_COMPRESSED (int)
    Read compressed data
    ZipArchive::FL_UNCHANGED (int)
    Use original data, ignoring changes.
    ZipArchive::FL_RECOMPRESS (int)
    Force recompression of data. Available as of PHP 8.0.0 and PECL zip 1.18.0. Deprecated as of PHP 8.3.0 and PECL zip 1.22.1, will be removed in a future version of libzip.
    ZipArchive::FL_ENCRYPTED (int)
    Read encrypted data (implies FL_COMPRESSED). Available as of PHP 8.0.0 and PECL zip 1.18.0.
    ZipArchive::FL_OVERWRITE (int)
    If file with name exists, overwrite (replace) it. Available as of PHP 8.0.0 and PECL zip 1.18.0.
    ZipArchive::FL_LOCAL (int)
    In local header. Available as of PHP 8.0.0 and PECL zip 1.18.0.
    ZipArchive::FL_CENTRAL (int)
    In central directory. Available as of PHP 8.0.0 and PECL zip 1.18.0.
    ZipArchive::FL_ENC_GUESS (int)
    Guess string encoding (is default). Available as of PHP 7.0.8.
    ZipArchive::FL_ENC_RAW (int)
    Get unmodified string. Available as of PHP 7.0.8.
    ZipArchive::FL_ENC_STRICT (int)
    Follow specification strictly. Available as of PHP 7.0.8.
    ZipArchive::FL_ENC_UTF_8 (int)
    String is UTF-8 encoded. Available as of PHP 7.0.8.
    ZipArchive::FL_ENC_CP437 (int)
    String is CP437 encoded. Available as of PHP 7.0.8.
    ZipArchive::FL_OPEN_FILE_NOW (int)
    Open the file when added instead of waiting for archive to be closed. Be aware of file descriptors consumption. Available as of PHP 8.3.0 and PECL zip 1.22.1.
    Compression modes
    ZipArchive::CM_DEFAULT (int)
    better of deflate or store.
    ZipArchive::CM_STORE (int)
    stored (uncompressed).
    ZipArchive::CM_SHRINK (int)
    shrunk
    ZipArchive::CM_REDUCE_1 (int)
    reduced with factor 1
    ZipArchive::CM_REDUCE_2 (int)
    reduced with factor 2
    ZipArchive::CM_REDUCE_3 (int)
    reduced with factor 3
    ZipArchive::CM_REDUCE_4 (int)
    reduced with factor 4
    ZipArchive::CM_IMPLODE (int)
    imploded
    ZipArchive::CM_DEFLATE (int)
    deflated
    ZipArchive::CM_DEFLATE64 (int)
    deflate64
    ZipArchive::CM_PKWARE_IMPLODE (int)
    PKWARE imploding
    ZipArchive::CM_BZIP2 (int)
    BZIP2 algorithm
    ZipArchive::CM_LZMA (int)
    LZMA algorithm
    ZipArchive::CM_LZMA2 (int)
    LZMA2 algorithm. Available as of PHP 7.4.3 and PECL zip 1.16.0, respectively, if built against libzip ≥ 1.6.0.
    ZipArchive::CM_ZSTD (int)
    Zstandard algorithm. Available as of PHP 8.0.0 and PECL zip 1.19.1, respectively, if built against libzip ≥ 1.8.0.
    ZipArchive::CM_XZ (int)
    XZ algorithm. Available as of PHP 7.4.3 and PECL zip 1.16.1, respectively, if built against libzip ≥ 1.6.0.
    ZipArchive::CM_TERSE (int)
    ZipArchive::CM_LZ77 (int)
    ZipArchive::CM_WAVPACK (int)
    ZipArchive::CM_PPMD (int)
    Errors
    ZipArchive::ER_OK (int)
    No error.
    ZipArchive::ER_MULTIDISK (int)
    Multi-disk zip archives not supported.
    ZipArchive::ER_RENAME (int)
    Renaming temporary file failed.
    ZipArchive::ER_CLOSE (int)
    Closing zip archive failed
    ZipArchive::ER_SEEK (int)
    Seek error
    ZipArchive::ER_READ (int)
    Read error
    ZipArchive::ER_WRITE (int)
    Write error
    ZipArchive::ER_CRC (int)
    CRC error
    ZipArchive::ER_ZIPCLOSED (int)
    Containing zip archive was closed
    ZipArchive::ER_NOENT (int)
    No such file.
    ZipArchive::ER_EXISTS (int)
    File already exists
    ZipArchive::ER_OPEN (int)
    Can't open file
    ZipArchive::ER_TMPOPEN (int)
    Failure to create temporary file.
    ZipArchive::ER_ZLIB (int)
    Zlib error
    ZipArchive::ER_MEMORY (int)
    Memory allocation failure
    ZipArchive::ER_CHANGED (int)
    Entry has been changed
    ZipArchive::ER_COMPNOTSUPP (int)
    Compression method not supported.
    ZipArchive::ER_EOF (int)
    Premature EOF
    ZipArchive::ER_INVAL (int)
    Invalid argument
    ZipArchive::ER_NOZIP (int)
    Not a zip archive
    ZipArchive::ER_INTERNAL (int)
    Internal error
    ZipArchive::ER_INCONS (int)
    Zip archive inconsistent
    ZipArchive::ER_REMOVE (int)
    Can't remove file
    ZipArchive::ER_DELETED (int)
    Entry has been deleted
    ZipArchive::ER_ENCRNOTSUPP (int)
    Encryption method not supported. Available as of PHP 7.4.3 and PECL zip 1.16.1, respectively.
    ZipArchive::ER_RDONLY (int)
    Read-only archive. Available as of PHP 7.4.3 and PECL zip 1.16.1, respectively.
    ZipArchive::ER_NOPASSWD (int)
    No password provided. Available as of PHP 7.4.3 and PECL zip 1.16.1, respectively.
    ZipArchive::ER_WRONGPASSWD (int)
    Wrong password provided. Available as of PHP 7.4.3 and PECL zip 1.16.1, respectively.
    ZipArchive::ER_OPNOTSUPP (int)
    Operation not supported. Available as of PHP 7.4.3 and PECL zip 1.16.1, respectively, if built against libzip ≥ 1.0.0.
    ZipArchive::ER_INUSE (int)
    Resource still in use. Available as of PHP 7.4.3 and PECL zip 1.16.1, respectively, if built against libzip ≥ 1.0.0.
    ZipArchive::ER_TELL (int)
    Tell error. Available as of PHP 7.4.3 and PECL zip 1.16.1, respectively, if built against libzip ≥ 1.0.0.
    ZipArchive::ER_COMPRESSED_DATA (int)
    Compressed data invalid. Available as of PHP 7.4.3 and PECL zip 1.16.1, respectively, if built against libzip ≥ 1.6.0.
    ZipArchive::ER_CANCELLED (int)
    Operation cancelled. Available as of PHP 7.4.3 and PECL zip 1.16.1, respectively, if built against libzip ≥ 1.6.0.
    ZipArchive::ER_DATA_LENGTH (int)
    Unexpected length of data. Available as of PHP 8.3.0 and PECL zip 1.22.0, respectively, if built against libzip ≥ 1.10.0.
    ZipArchive::ER_NOT_ALLOWED (int)
    Not allowed in torrentzip. Available as of PHP 8.3.0 and PECL zip 1.22.0, respectively, if built against libzip ≥ 1.10.0.
    Encryption modes
    ZipArchive::EM_NONE (int)
    No encryption. Available as of PHP 7.2.0 and PECL zip 1.14.0, respectively.
    ZipArchive::EM_TRAD_PKWARE (int)
    Traditional PKWARE encryption. Available as of PHP 8.0.0 and PECL zip 1.19.0, respectively.
    ZipArchive::EM_AES_128 (int)
    AES 128 encryption. Available as of PHP 7.2.0 and PECL zip 1.14.0, respectively, if built against libzip ≥ 1.2.0.
    ZipArchive::EM_AES_192 (int)
    AES 192 encryption. Available as of PHP 7.2.0 and PECL zip 1.14.0, respectively, if built against libzip ≥ 1.2.0.
    ZipArchive::EM_AES_256 (int)
    AES 256 encryption. Available as of PHP 7.2.0 and PECL zip 1.14.0, respectively, if built against libzip ≥ 1.2.0.
    ZipArchive::EM_UNKNOWN (int)
    Unknown encryption algorithm. Available as of PHP 8.0.0 and PECL zip 1.19.0, respectively.
    Length parameter constants
    ZipArchive::LENGTH_TO_END (int)
    Use file size, if the file grows additionnal data is ignored, if the file shrinks an error is raised (ZipArchive::ER_DATA_LENGTH). Available as of PHP 8.3.0 and PECL zip 1.22.2.
    ZipArchive::LENGTH_UNCHECKED (int)
    Use all available data. Available as of PHP 8.3.0 and PECL zip 1.22.2, if built against libzip ≥ 1.10.1.
    Other constants
    ZipArchive::LIBZIP_VERSION (string)
    Zip library version. Available as of PHP 7.4.3 and PECL zip 1.16.0.
    Operating system constants for external attributes
    ZipArchive::OPSYS_DOS (int)
    ZipArchive::OPSYS_AMIGA (int)
    ZipArchive::OPSYS_OPENVMS (int)
    ZipArchive::OPSYS_UNIX (int)
    ZipArchive::OPSYS_VM_CMS (int)
    ZipArchive::OPSYS_ATARI_ST (int)
    ZipArchive::OPSYS_OS_2 (int)
    ZipArchive::OPSYS_MACINTOSH (int)
    ZipArchive::OPSYS_Z_SYSTEM (int)
    ZipArchive::OPSYS_CPM (int)
    ZipArchive::OPSYS_WINDOWS_NTFS (int)
    ZipArchive::OPSYS_MVS (int)
    ZipArchive::OPSYS_VSE (int)
    ZipArchive::OPSYS_ACORN_RISC (int)
    ZipArchive::OPSYS_VFAT (int)
    ZipArchive::OPSYS_ALTERNATE_MVS (int)
    ZipArchive::OPSYS_BEOS (int)
    ZipArchive::OPSYS_TANDEM (int)
    ZipArchive::OPSYS_OS_400 (int)
    ZipArchive::OPSYS_OS_X (int)
    ZipArchive::OPSYS_DEFAULT (int)
    Since PECL zip 1.12.4
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