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)
    }
  }
}