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PHP

Examples


Examples

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 processed
eio_nop(EIO_PRI_DEFAULT"my_nop_cb""2");

// Process requests
eio_event_loop();
?>

The above example will output something similar to:

 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 (
$result == && !is_readable($temp_filename) && is_writable($temp_filename)) {
        echo 
"eio_chmod_ok";
    }

    @
unlink($temp_filename);
}

eio_chmod($temp_filename0200EIO_PRI_DEFAULT"my_chmod_callback");
eio_event_loop();
?>

The above example will output something similar to:

 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();
?>

The above example will output something similar to:

 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_fd40EIO_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_filenameEIO_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();
?>

The above example will output something similar to:

 resource(6) of type (EIO Group Descriptor) bool(true) string(4) "some" bool(true) 

Example #5 Using eio with libevent

<?php
function 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"0750EIO_PRI_DEFAULT"my_nop_cb""nop data");
/* some other eio_* calls here ... */


// set event flags
event_set($event$fdEV_READ /*| EV_PERSIST*/"my_eio_poll", array($event$base));

// set event base 
event_base_set($event$base);

// enable event
event_add($event);

// start event loop
event_base_loop($base);

/* The same will be available via buffered libevent interface */
?>

The above example will output something similar to:

 int(3) int(0) string(8) "nop data" int(0) string(10) "mkdir data" 



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