eio_open
(PECL eio >= 0.0.1dev)
eio_open — Opens a file
說明
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
參數
-
path -
Path of the file to be opened.
警告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.hC header file. Default isEIO_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 -
請求的優先順序：
EIO_PRI_DEFAULT，EIO_PRI_MIN，EIO_PRI_MAX或null。如果是null，pri將設為EIO_PRI_DEFAULT。 -
callback -
callback函式在請求完成時被呼叫。其應匹配一下原型：void callback(mixed $data, int $result[, resource $req]);-
data -
傳遞給請求的用戶數據。
-
result -
針對請求的結果的值。通常是相應的系統呼叫返回的值。
-
req -
可選的請求資源，可被 eio_get_last_error() 之類的函式使用。
-
-
data -
Arbitrary variable passed to
callback.
返回值
eio_open() returns file descriptor in
result argument of callback
on success; otherwise, result is equal to -1.
範例
示例 #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();
?>
以上例程的輸出類似於：
bool(true) bool(true)
參見
- eio_mknod() - Create a special or ordinary file