PHP: eio_readdir

Beschreibung

function eio_readdir(
    string $path,
    int $flags,
    int $pri,
    callable $callback,
    string $data = NULL
): resource

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.

Parameter-Liste

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

Die callback-Funktion wird aufgerufen, wenn die Anfrage abgeschlossen ist. Sie muss dem folgenden Prototyp entsprechen:

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

data: sind die benutzerdefinierten Daten, die an die Anfrage übergeben werden.
result: der anfragespezifische Ergebniswert; im Grunde der Wert, der vom entsprechenden Systemaufruf zurückgegeben wird.
req: ist eine optionale Anfrage-Ressource, die in Funktionen wie eio_get_last_error() verwendet werden kann.

data

Arbitrary variable passed to callback.

Rückgabewerte

eio_readdir() returns request resource on success,Bei einem Fehler wird false zurückgegeben.. Sets result argument of callback function according to flags:

EIO_READDIR_DENTS (int): 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 (int): 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 (int): 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 (int)

Node types:

EIO_DT_UNKNOWN (int): Unknown node type(very common). Further stat() needed.
EIO_DT_FIFO (int): FIFO node type
EIO_DT_CHR (int): Node type
EIO_DT_MPC (int): Multiplexed char device (v7+coherent) node type
EIO_DT_DIR (int): Directory node type
EIO_DT_NAM (int): Xenix special named file node type
EIO_DT_BLK (int): Node type
EIO_DT_MPB (int): Multiplexed block device (v7+coherent)
EIO_DT_REG (int): Node type
EIO_DT_NWK (int)
EIO_DT_CMP (int): HP-UX network special node type
EIO_DT_LNK (int): Link node type
EIO_DT_SOCK (int): Socket node type
EIO_DT_DOOR (int): Solaris door node type
EIO_DT_WHT (int): Node type
EIO_DT_MAX (int): Highest node type value

Beispiele

Beispiel #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();
?>

Das oben gezeigte Beispiel erzeugt eine ähnliche Ausgabe wie:

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_readdir

Beschreibung

Parameter-Liste

Rückgabewerte

Beispiele

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User Contributed Notes