(PECL eio >= 0.0.1dev)
eio_open — Opens a file
$path
, int $flags
, int $mode
, int $pri
, callable $callback
[, mixed $data = NULL
] )
eio_open() opens file specified by
path in access mode mode with
path
Path of the file to be opened.
In some SAPIs(e.g. PHP-FPM) it could fail, if you don't specify full path.
flags
One of EIO_O_* constants, or their
combinations. EIO_O_* constants have the same
meaning, as their corresponding O_* counterparts
defined in fnctl.h C header file. Default is
EIO_O_RDWR.
mode
One of EIO_S_I* constants, or their combination (via bitwise OR operator). The constants have the same meaning as their S_I* counterparts defined in » sys/stat.h C header file. Required, if a file is created. Otherwise ignored.
pri
请求的优先级: EIO_PRI_DEFAULT, EIO_PRI_MIN, EIO_PRI_MAX, or NULL.
如果是 NULL , pri 将设为
EIO_PRI_DEFAULT.
callback
callback 函数将在请求结束时被调用.
必须符合此原型:
void callback($data, $result);
$data 是传给该请求的特定数据.
$result 包含特定请求的结果值, 通常是相应的系统调用的返回值.
data
Arbitrary variable passed to callback.
eio_open() returns file descriptor in
result argument of callback
on success; otherwise, result is equal to -1.
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();
?>
以上例程的输出类似于：
bool(true) bool(true)