PHP
处理控制 | Process Control

eio_grp

eio_grp

(PECL eio >= 0.0.1dev)

eio_grp — Creates a request group.

Description

resource eio_grp ( callable $callback [, string $data = NULL ] )

eio_grp() creates a request group.

Parameters

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_grp() returns request group resource on success or FALSE on error.

Examples

Example #1 eio_grp() example

<?php $temp_filename = dirname(__FILE__) ."/eio-file.tmp"; $fp = fopen($temp_filename, "w" fwrite($fp, "some data" fclose($fp $my_file_fd = NULL; /* Is called when the group requests are done */ function my_grp_done($data, $result) {  // Remove the file, if it still exists  @unlink($data } /* Is called when the temporary file is opened */ function my_grp_file_opened_callback($data, $result) {  global $my_file_fd, $grp;  $my_file_fd = $result;  $req = eio_read($my_file_fd, 4, 0,    EIO_PRI_DEFAULT, "my_grp_file_read_callback"  eio_grp_add($grp, $req } /* Is called when the file is read */ function my_grp_file_read_callback($data, $result) {  global $my_file_fd, $grp;  var_dump($result  // Create request to close the file  $req = eio_close($my_file_fd  // Add request to the group  eio_grp_add($grp, $req } // Create request group $grp = eio_grp("my_grp_done", $temp_filename // Create request $req = eio_open($temp_filename, EIO_O_RDWR | EIO_O_APPEND , NULL,   EIO_PRI_DEFAULT, "my_grp_file_opened_callback", NULL // Add request to the group eio_grp_add($grp, $req // Process requests eio_event_loop( ?>

The above example will output something similar to:

string(4) "some"

See Also

  • eio_grp_cancel

  • eio_grp_add

← eio_grp_limit

eio_init →

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https://secure.php.net/manual/en/function.eio-grp.php