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# eio_readdir

(PECL eio >= 0.0.1dev)

eio_readdir — Reads through a whole directory

### Descrição

resource eio_readdir ( string `$path` , int `$flags` , int `$pri` , callable `$callback` [, string `$data` = NULL ] )

Reads through a whole directory(via the opendir, readdir and closedir system calls) and returns either the names or an array in `result` argument of `callback` function, depending on the `flags` argument.

### Parâmetros

`path`

  Directory path.

`flags`

  Combination of EIO_READDIR_* constants.

`pri`

  A prioridade de requisição: `EIO_PRI_DEFAULT`, `EIO_PRI_MIN`, `EIO_PRI_MAX`, ou `NULL`. Se `NULL` for passado, `pri` será internamente configurado para `EIO_PRI_DEFAULT`.

`callback`

  A função `callback` é chamada quando a requisição for finalizada. Ela deve seguir o seguinte protótipo:

  `void callback($data, $result);`
  `$data` são dados customizados passados para a requisição. `$result` contém resultados específicas à requisição; basicamente, o valor retornado pela chamada de sistema correspondente.
`data`

  Arbitrary variable passed to `callback`.

### Valor Retornado

eio_readdir() returns request resource on success, or `FALSE` on error. Sets `result` argument of `callback` function according to `flags`:

`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)

Node types:

`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

### Exemplos

Exemplo #1 eio_readdir() example

`<?php
/* Is called when eio_readdir() finishes */
function my_readdir_callback($data, $result) {
echo __FUNCTION__, " called\n";
echo "data: "; var_dump($data);
echo "result: "; var_dump($result);
echo "\n";
}
eio_readdir("/var/spool/news", EIO_READDIR_STAT_ORDER | EIO_READDIR_DIRS_FIRST,
EIO_PRI_DEFAULT, "my_readdir_callback");
eio_event_loop();
?>`

O exemplo acima irá imprimir algo similar à:

    my_readdir_callback called
    data: NULL
    result: array(2) {
     ["names"]=>
      array(7) {
       [0]=>
        string(7) "archive"
        [1]=>
        string(8) "articles"
        [2]=>
        string(8) "incoming"
        [3]=>
        string(7) "innfeed"
        [4]=>
        string(8) "outgoing"
        [5]=>
        string(8) "overview"
        [6]=>
        string(3) "tmp"
      }
     ["dents"]=>
      array(7) {
       [0]=>
        array(3)
        {
         ["name"]=>
          string(7)
          "archive"
          ["type"]=>
          int(4)
          ["inode"]=>
          int(393265)
        }
       [1]=>
        array(3)
        {
         ["name"]=>
          string(8)
          "articles"
          ["type"]=>
          int(4)
          ["inode"]=>
          int(393266)
        }
       [2]=>
        array(3)
        {
         ["name"]=>
          string(8)
          "incoming"
          ["type"]=>
          int(4)
          ["inode"]=>
          int(393267)
        }
       [3]=>
        array(3)
        {
         ["name"]=>
          string(7)
          "innfeed"
          ["type"]=>
          int(4)
          ["inode"]=>
          int(393269)
        }
       [4]=>
        array(3)
        {
         ["name"]=>
          string(8)
          "outgoing"
          ["type"]=>
          int(4)
          ["inode"]=>
          int(393270)
        }
       [5]=>
        array(3)
        {
         ["name"]=>
          string(8)
          "overview"
          ["type"]=>
          int(4)
          ["inode"]=>
          int(393271)
        }
       [6]=>
        array(3)
        {
         ["name"]=>
          string(3)
          "tmp"
          ["type"]=>
          int(4)
          ["inode"]=>
          int(393272)
        }
      }
    }

eio_readahead
eio_readlink
Eio Funções
PHP Manual