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 three types of constants : Flags (prefixed with FL_), errors (prefixed with ER_) and mode (no prefix).
ZipArchive::CREATE
     (integer)
   ZipArchive::OVERWRITE
     (integer)
   ZipArchive::EXCL
     (integer)
   ZipArchive::CHECKCONS
     (integer)
   ZipArchive::FL_NOCASE
     (integer)
   ZipArchive::FL_NODIR
     (integer)
   ZipArchive::FL_COMPRESSED
     (integer)
   ZipArchive::FL_UNCHANGED
     (integer)
   ZipArchive::CM_DEFAULT
     (integer)
   ZipArchive::CM_STORE
     (integer)
   ZipArchive::CM_SHRINK
     (integer)
   ZipArchive::CM_REDUCE_1
     (integer)
   ZipArchive::CM_REDUCE_2
     (integer)
   ZipArchive::CM_REDUCE_3
     (integer)
   ZipArchive::CM_REDUCE_4
     (integer)
   ZipArchive::CM_IMPLODE
     (integer)
   ZipArchive::CM_DEFLATE
     (integer)
   ZipArchive::CM_DEFLATE64
     (integer)
   ZipArchive::CM_PKWARE_IMPLODE
     (integer)
   ZipArchive::CM_BZIP2
     (integer)
   ZipArchive::ER_OK
     (integer)
   ZipArchive::ER_MULTIDISK
     (integer)
   ZipArchive::ER_RENAME
     (integer)
   ZipArchive::ER_CLOSE
     (integer)
   ZipArchive::ER_SEEK
     (integer)
   ZipArchive::ER_READ
     (integer)
   ZipArchive::ER_WRITE
     (integer)
   ZipArchive::ER_CRC
     (integer)
   ZipArchive::ER_ZIPCLOSED
     (integer)
   ZipArchive::ER_NOENT
     (integer)
   ZipArchive::ER_EXISTS
     (integer)
   ZipArchive::ER_OPEN
     (integer)
   ZipArchive::ER_TMPOPEN
     (integer)
   ZipArchive::ER_ZLIB
     (integer)
   ZipArchive::ER_MEMORY
     (integer)
   ZipArchive::ER_CHANGED
     (string)
   ZipArchive::ER_COMPNOTSUPP
     (integer)
   ZipArchive::ER_EOF
     (integer)
   ZipArchive::ER_INVAL
     (integer)
   ZipArchive::ER_NOZIP
     (integer)
   ZipArchive::ER_INTERNAL
     (integer)
   ZipArchive::ER_INCONS
     (integer)
   ZipArchive::ER_REMOVE
     (integer)
   ZipArchive::ER_DELETED
     (integer)
   ZipArchive::OPSYS_DOS (integer)
   ZipArchive::OPSYS_AMIGA (integer)
   ZipArchive::OPSYS_OPENVMS (integer)
   ZipArchive::OPSYS_UNIX (integer)
   ZipArchive::OPSYS_VM_CMS (integer)
   ZipArchive::OPSYS_ATARI_ST (integer)
   ZipArchive::OPSYS_OS_2 (integer)
   ZipArchive::OPSYS_MACINTOSH (integer)
   ZipArchive::OPSYS_Z_SYSTEM (integer)
   ZipArchive::OPSYS_CPM (integer)
   ZipArchive::OPSYS_WINDOWS_NTFS (integer)
   ZipArchive::OPSYS_MVS (integer)
   ZipArchive::OPSYS_VSE (integer)
   ZipArchive::OPSYS_ACORN_RISC (integer)
   ZipArchive::OPSYS_VFAT (integer)
   ZipArchive::OPSYS_ALTERNATE_MVS (integer)
   ZipArchive::OPSYS_BEOS (integer)
   ZipArchive::OPSYS_TANDEM (integer)
   ZipArchive::OPSYS_OS_400 (integer)
   ZipArchive::OPSYS_OS_X (integer)
   ZipArchive::OPSYS_DEFAULT (integer)