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# Vordefinierte Konstanten

Folgende Konstanten werden von dieser Erweiterung definiert und stehen nur zur Verfügung, wenn die Erweiterung entweder statisch in PHP kompiliert oder dynamisch zur Laufzeit geladen wurde.

Request priority constants:

`EIO_PRI_MIN` (integer)
  Request minimal prioriry
`EIO_PRI_DEFAULT` (integer)
  Request default prioriry
`EIO_PRI_MAX` (integer)
  Request maximal prioriry

eio_seek() `whence` argument:

`EIO_SEEK_SET` (integer)
  The offset is set to specified number of bytes(`offset`).
`EIO_SEEK_CUR` (integer)
  The offset is set to its current location plus `offset` bytes.
`EIO_SEEK_END` (integer)
  The offset is set to the size of the file plus `offset` bytes.

Flags used with eio_readdir():

`EIO_READDIR_DENTS` (integer)
  eio_readdir() flag. If specified, the result argument of the callback becomes an array with the following keys: 'names' - array of directory names 'dents' - array of struct eio_dirent-like arrays having the following keys each: 'name' - the directory name; 'type' - one of EIO_DT_* constants; 'inode' - the inode number, if available, otherwise unspecified;
`EIO_READDIR_DIRS_FIRST` (integer)
  When this flag is specified, the names will be returned in an order where likely directories come first, in optimal stat order.
`EIO_READDIR_STAT_ORDER` (integer)
  When this flag is specified, then the names will be returned in an order suitable for stat'ing each one. When planning to stat() all files in the given directory, the returned order will likely be fastest.
`EIO_READDIR_FOUND_UNKNOWN` (integer)
`EIO_DT_UNKNOWN` (integer)
  Unknown node type(very common). Further stat() needed.
`EIO_DT_FIFO` (integer)
  FIFO node type
`EIO_DT_CHR` (integer)
  Node type
`EIO_DT_MPC` (integer)
  Multiplexed char device (v7+coherent) node type
`EIO_DT_DIR` (integer)
  Directory node type
`EIO_DT_NAM` (integer)
  Xenix special named file node type
`EIO_DT_BLK` (integer)
  Node type
`EIO_DT_MPB` (integer)
  Multiplexed block device (v7+coherent)
`EIO_DT_REG` (integer)
  Node type
`EIO_DT_NWK` (integer)
`EIO_DT_CMP` (integer)
  HP-UX network special node type
`EIO_DT_LNK` (integer)
  Link node type
`EIO_DT_SOCK` (integer)
  Socket node type
`EIO_DT_DOOR` (integer)
  Solaris door node type
`EIO_DT_WHT` (integer)
  Node type
`EIO_DT_MAX` (integer)
  Highest node type value

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)

> Hinweis:

> EIO_S_I* constants have the same meaning as their S_I* POSIX counterparts.

> Hinweis:

> EIO_SYNC_FILE_* constants have the same meaning as their SYNC_FILE_** counterparts.

> Hinweis:

> EIO_O_* constants have the same meaning as their O_* POSIX counterparts.

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Eio
PHP Manual