Php/docs/eio.examples
范例
Example #1 Cancelling a request
<?php /* Is called when eio_nop() finished */ function my_nop_cb($data, $result) { echo "my_nop ", $data, "\n"; }// This eio_nop() call will be cancelled$req = eio_nop(EIO_PRI_DEFAULT, "my_nop_cb", "1");var_dump($req);eio_cancel($req);// This time eio_nop() will be processedeio_nop(EIO_PRI_DEFAULT, "my_nop_cb", "2");// Process requestseio_event_loop();?>
以上例程的输出类似于：
resource(4) of type (EIO Request Descriptor) my_nop 2
Example #2 Calling eio_chmod()
<?php$temp_filename = dirname(__FILE__) ."/eio-temp-file.tmp";touch($temp_filename);/* Is called when eio_chmod() finished */function my_chmod_callback($data, $result) { global $temp_filename; if ($result == 0 && !is_readable($temp_filename) && is_writable($temp_filename)) { echo "eio_chmod_ok"; } @unlink($temp_filename);}eio_chmod($temp_filename, 0200, EIO_PRI_DEFAULT, "my_chmod_callback");eio_event_loop();?>
以上例程的输出类似于：
eio_chmod_ok
Example #3 Making a custom request
<?php/* Callback for the custom callback */function my_custom_callback($data, $result) { var_dump($data); var_dump(count($result)); var_dump($result['data_modified']); var_dump($result['result']);}/* The custom request */function my_custom($data) { var_dump($data); $result = array( 'result' => 1001, 'data_modified' => "my custom data", ); return $result;}$data = "my_custom_data";$req = eio_custom("my_custom", EIO_PRI_DEFAULT, "my_custom_callback", $data);var_dump($req);eio_event_loop();?>
以上例程的输出类似于：
resource(4) of type (EIO Request Descriptor) string(14) "my_custom_data" string(14) "my_custom_data" int(2) string(14) "my custom data" int(1001)
Example #4 Grouping requests
<?php/* * Create a group request to open, read and close a file */$temp_filename = dirname(__FILE__) ."/eio-file.tmp";$fp = fopen($temp_filename, "w");fwrite($fp, "some data");fclose($fp);/* Is called when the group requests are done */function my_grp_done($data, $result) { global $temp_filename; var_dump($result == 0); @unlink($temp_filename);}/* Is called when eio_open() done */function my_grp_file_opened_callback($data, $result) { global $my_file_fd, $grp; $my_file_fd = $result; var_dump($result > 0); // Create eio_read() request and add it to the group $req = eio_read($my_file_fd, 4, 0, EIO_PRI_DEFAULT, "my_grp_file_read_callback"); eio_grp_add($grp, $req);}/* Is called when eio_read() done */function my_grp_file_read_callback($data, $result) { global $my_file_fd, $grp; var_dump($result); // Create eio_close() request and add it to the group $req = eio_close($my_file_fd); eio_grp_add($grp, $req);}$grp = eio_grp("my_grp_done", "my_grp_data");// Create eio_open() request and add it to the group$req = eio_open($temp_filename, EIO_O_RDWR | EIO_O_APPEND , NULL, EIO_PRI_DEFAULT, "my_grp_file_opened_callback", NULL);eio_grp_add($grp, $req);var_dump($grp);eio_event_loop();?>
以上例程的输出类似于：
resource(6) of type (EIO Group Descriptor) bool(true) string(4) "some" bool(true)
Example #5 Using eio with libevent extension
<?phpfunction my_eio_poll($fd, $events, $arg) { /* Some libevent regulation might go here .. */ if (eio_nreqs()) { eio_poll(); } /* .. and here */}function my_nop_cb($d, $r) { var_dump($r); var_dump($d);}$base = event_base_new();$event = event_new();$fd = eio_get_event_stream();var_dump($fd);eio_nop(EIO_PRI_DEFAULT, "my_nop_cb", "nop data");eio_mkdir("/tmp/abc-eio-temp", 0750, EIO_PRI_DEFAULT, "my_nop_cb", "nop data");/* some other eio_* calls here ... */// set event flagsevent_set($event, $fd, EV_READ /*| EV_PERSIST*/, "my_eio_poll", array($event, $base));// set event base event_base_set($event, $base);// enable eventevent_add($event);// start event loopevent_base_loop($base);/* The same will be available via buffered libevent interface */?>
以上例程的输出类似于：
int(3) int(0) string(8) "nop data" int(0) string(10) "mkdir data"
Example #6 Using eio with event extension
<?php$base = new EventBase();// Retrieve eio polling stream.// Note, this variable should be alive as long as the event loop is running.$eio_stream = eio_get_event_stream();// Bind eio polling stream to the event loop.$poll_event = new Event($base, $eio_stream, Event::READ, function () { if (eio_nreqs()) { eio_poll(); }});$poll_event->add();// Add eio jobseio_nop(EIO_PRI_DEFAULT, function () { echo "eio_nop\n";});// Add events$timer = Event::timer($base, function () { echo "2 seconds elapsed\n";});$timer->add(2);// Dispatch events.$base->dispatch();?>
以上例程的输出类似于：
eio_nop 2 seconds elapsed
