php-doc-en/reference/eio/examples.xml

<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision$ -->

<chapter xml:id="eio.examples" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
 &reftitle.examples;
 <para>
 <example>
 <title>Cancelling a request</title>
 <programlisting role="php">
 <![CDATA[
 <?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();
?>
]]>
</programlisting>
&example.outputs.similar;
<screen>
 <![CDATA[
resource(4) of type (EIO Request Descriptor)
my_nop 2
 ]]>
 </screen>
 </example>
 </para>

 <para>
 <example>
 <title>Calling <function>eio_chmod()</function></title>
 <programlisting role="php">
 <![CDATA[
<?php 
$temp_filename = "eio-temp-file.tmp";
touch($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();
?>
]]>
</programlisting>
&example.outputs.similar;
<screen>
 <![CDATA[
eio_chmod_ok
 ]]>
 </screen>
 </example>
 </para>

 <para>
 <example>
 <title>Making a custom request</title>
 <programlisting role="php">
 <![CDATA[
<?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();
?>
]]>
</programlisting>
&example.outputs.similar;
<screen>
 <![CDATA[
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)
 ]]>
 </screen>
 </example>
 </para>

 <para>
 <example>
 <title>Grouping requests</title>
 <programlisting role="php">
 <![CDATA[
<?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();
?>
]]>
</programlisting>
&example.outputs.similar;
<screen>
 <![CDATA[
resource(6) of type (EIO Group Descriptor)
bool(true)
string(4) "some"
bool(true)
 ]]>
 </screen>
 </example>
 </para>

</chapter>

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