Reads through a whole directory

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Eio Functions
PHP Manual

# eio_readdir

(PECL eio >= 0.0.1dev)

eio_readdir — Reads through a whole directory

### Description

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.

### Parameters

`path`

  Directory path.

`flags`

  Combination of EIO_READDIR_* constants.

`pri`

  The request priority: `EIO_PRI_DEFAULT`, `EIO_PRI_MIN`, `EIO_PRI_MAX`, or `NULL`. If `NULL` passed, `pri` internally is set to `EIO_PRI_DEFAULT`.

`callback`

  `callback` function is called when the request is done. It should match the following prototype:

  `void callback(mixed $data, int $result[, resource $req]);`
  `data`

    is custom data passed to the request.

  `result`

    request-specific result value; basically, the value returned by corresponding system call.

  `req`

    is optional request resource which can be used with functions like eio_get_last_error()

`data`

  Arbitrary variable passed to `callback`.

### Return Values

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

### Examples

Example #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();
?>`

The above example will output something similar to:

    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)
        }
      }
    }

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Eio Functions
PHP Manual