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)
}
}
}← eio_readahead
eio_readlink →
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