array ( 0 => 'index.php', 1 => 'PHP Manual', ), 'head' => array ( 0 => 'UTF-8', 1 => 'en', ), 'this' => array ( 0 => 'function.eio-open.php', 1 => 'eio_open', 2 => 'Opens a file', ), 'up' => array ( 0 => 'ref.eio.php', 1 => 'Eio Functions', ), 'prev' => array ( 0 => 'function.eio-nthreads.php', 1 => 'eio_nthreads', ), 'next' => array ( 0 => 'function.eio-poll.php', 1 => 'eio_poll', ), 'alternatives' => array ( ), 'source' => array ( 'lang' => 'en', 'path' => 'reference/eio/functions/eio-open.xml', ), 'history' => array ( ), ); $setup["toc"] = $TOC; $setup["toc_deprecated"] = $TOC_DEPRECATED; $setup["parents"] = $PARENTS; manual_setup($setup); contributors($setup); ?>

eio_open

(PECL eio >= 0.0.1dev)

eio_open — Opens a file

Description

eio_open(
    string $path,
    int $flags,
    int $mode,
    int $pri,
    callable $callback,
    mixed $data = NULL
): resource

eio_open() opens file specified by path in access mode mode with

Parameters

path

Path of the file to be opened.

Warning

In some SAPIs(e.g. PHP-FPM) it could fail, if you don't specify full path.

flags
One of EIO_O_* constants, or their combinations. EIO_O_* constants have the same meaning, as their corresponding O_* counterparts defined in fnctl.h C header file. Default is EIO_O_RDWR.
mode
One of EIO_S_I* constants, or their combination (via bitwise OR operator). The constants have the same meaning as their S_I* counterparts defined in » sys/stat.h C header file. Required, if a file is created. Otherwise ignored.
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_open() returns file descriptor in result argument of callback on success; otherwise, result is equal to -1.

Examples

Example #1 eio_open() example

<?php
$temp_filename = "eio-temp-file.tmp";

/* Is called when eio_close() finishes */
function my_close_cb($data, $result) {
// Zero indicates success
var_dump($result == 0);
@unlink($data);
}

/* Is called when eio_open() finishes */
function my_file_opened_callback($data, $result) {
// $result should contain the file descriptor
var_dump($result > 0);

if ($result > 0) {
// Close the file
eio_close($result, EIO_PRI_DEFAULT, "my_close_cb", $data);
eio_event_loop();
}
}

// Create new file for reading and writing
// Deny group and others to do anything with that file
eio_open($temp_filename, EIO_O_CREAT | EIO_O_RDWR, EIO_S_IRUSR | EIO_S_IWUSR,
EIO_PRI_DEFAULT, "my_file_opened_callback", $temp_filename);
eio_event_loop();
?>

The above example will output something similar to:

bool(true)
bool(true)

See Also