eio_grp

(PECL eio >= 0.0.1dev)

Createsa request group.

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:

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

data

Arbitrary variable passed to callback.

Returns:

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

Examples:

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"

Links:

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

doc_php

2025-01-10 15:47:30

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