eio_open

(PECL eio >= 0.0.1dev)

Opens a file

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

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:

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

data

Arbitrary variable passed to callback.

Returns:

eio_open() returns file descriptor in result argument of callback on success; otherwise, result is equal to -1.

Examples:

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)

Links:

http://php.net/manual/en/function.eio-open.php

doc_php

2025-01-10 15:47:30

Comments