Php/docs/function.eio-open
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
pathPath of the file to be opened.
Warning
In some SAPIs(e.g. PHP-FPM) it could fail, if you don't specify full path.
flagsOne of EIO_O_* constants, or their combinations. EIO_O_* constants have the same meaning, as their corresponding O_* counterparts defined in
fnctl.hC header file. Default isEIO_O_RDWR.modeOne 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.
priThe request priority:
EIO_PRI_DEFAULT,EIO_PRI_MIN,EIO_PRI_MAX, orNULL. IfNULLpassed,priinternally is set toEIO_PRI_DEFAULT.callbackcallbackfunction is called when the request is done. It should match the following prototype:void callback(mixed $data, int $result[, resource $req]);datais custom data passed to the request.
resultrequest-specific result value; basically, the value returned by corresponding system call.
reqis optional request resource which can be used with functions like eio_get_last_error()
dataArbitrary variable passed to
callback.
Return Values
eio_open() returns file descriptor in
result argument of callback
on success; otherwise, result is equal to -1.
Examples
Example #1 eio_open() example
<?php$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", $data); eio_event_loop(); }}// Create new file for reading and writing// Deny group and others to do anything with that fileeio_open($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)
