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.
Request priority constants:
EIO_PRI_MIN
     (integer)
    EIO_PRI_DEFAULT
     (integer)
    EIO_PRI_MAX
     (integer)
    eio_seek() whence argument:
  
EIO_SEEK_SET
     (integer)
    offset).
     
    EIO_SEEK_CUR
     (integer)
    offset bytes.
     
    EIO_SEEK_END
     (integer)
    offset bytes.
     
    Flags used with eio_readdir():
EIO_READDIR_DENTS
     (integer)
    EIO_READDIR_DIRS_FIRST
     (integer)
    EIO_READDIR_STAT_ORDER
     (integer)
    EIO_READDIR_FOUND_UNKNOWN
     (integer)
    EIO_DT_UNKNOWN
     (integer)
    EIO_DT_FIFO
     (integer)
    EIO_DT_CHR
     (integer)
    EIO_DT_MPC
     (integer)
    EIO_DT_DIR
     (integer)
    EIO_DT_NAM
     (integer)
    EIO_DT_BLK
     (integer)
    EIO_DT_MPB
     (integer)
    EIO_DT_REG
     (integer)
    EIO_DT_NWK
     (integer)
    EIO_DT_CMP
     (integer)
    EIO_DT_LNK
     (integer)
    EIO_DT_SOCK
     (integer)
    EIO_DT_DOOR
     (integer)
    EIO_DT_WHT
     (integer)
    EIO_DT_MAX
     (integer)
    
  Access modes for eio_open() flags
  argument:
  
EIO_O_RDONLY
     (integer)
    EIO_O_WRONLY
     (integer)
    EIO_O_RDWR
     (integer)
    EIO_O_NONBLOCK
     (integer)
    EIO_O_APPEND
     (integer)
    EIO_O_CREAT
     (integer)
    EIO_O_TRUNC
     (integer)
    EIO_O_EXCL
     (integer)
    EIO_O_FSYNC
     (integer)
    
  mode argument flags for eio_open():
  
EIO_S_IRUSR
     (integer)
    EIO_S_IWUSR
     (integer)
    EIO_S_IXUSR
     (integer)
    EIO_S_IRGRP
     (integer)
    EIO_S_IWGRP
     (integer)
    EIO_S_IXGRP
     (integer)
    EIO_S_IROTH
     (integer)
    EIO_S_IWOTH
     (integer)
    EIO_S_IXOTH
     (integer)
    EIO_S_IFREG
     (integer)
    EIO_S_IFCHR
     (integer)
    EIO_S_IFBLK
     (integer)
    EIO_S_IFIFO
     (integer)
    EIO_S_IFSOCK
     (integer)
    eio_sync_file_range() flags:
EIO_SYNC_FILE_RANGE_WAIT_BEFORE
     (integer)
    EIO_SYNC_FILE_RANGE_WRITE
     (integer)
    EIO_SYNC_FILE_RANGE_WAIT_AFTER
     (integer)
    eio_fallocate() flags:
EIO_FALLOC_FL_KEEP_SIZE
     (integer)
    Note:
EIO_S_I* constants have the same meaning as their S_I* POSIX counterparts.
Note:
EIO_SYNC_FILE_* constants have the same meaning as their SYNC_FILE_** counterparts.
Note:
EIO_O_* constants have the same meaning as their O_* POSIX counterparts.