Appium Php Error: You must include a platformName capability

[jeyakumarsbe]

Hi,

I'm new to appium. I write my first script and executed its throwing below error.
Below same Capabilities working Appium desktop Session.

My Code:

require_once "vendor/autoload.php";

class MySuperTests extends PHPUnit_Extensions_AppiumTestCase
{
public static $browsers = array(
array(
'host' => true,
'port' => 4444,
'browserName' => '',
'desiredCapabilities' => array(
'app' => 'D:\xamp\htdocs\appium\sample-code\examples\test\myapp.apk',
'platformName' => 'Android',
'platformVersion' => '7.0',
'deviceName' => 'emulator-5551'
)
)
);

// this fails for some reason
public function testInstallApp()
{
    $this->installApp('D:\xamp\htdocs\appium\sample-code\examples\test\myapp.apk');
}

}

$obj = new MySuperTests();
$obj->testInstallApp();

Got Below Error:

[info] [Appium] Welcome to Appium v1.7.2
[info] [Appium] Non-default server args:
[info] [Appium] address: localhost
[info] [Appium] port: 4444
[info] [Appium] Appium REST http interface listener started on localhost:4444[info] [HTTP] --> POST /wd/hub/session {"desiredCapabilities":{"browserName":""}}
[debug] [MJSONWP] Calling AppiumDriver.createSession() with args: [{"browserName":""},null,null]
[debug] [BaseDriver] Event 'newSessionRequested' logged at 1524208895020 (12:51:35 GMT+0530 (India Standard Time))
[error] [MJSONWP] Encountered internal error running command: Error: You must include a platformName capability
at AppiumDriver.getDriverForCaps (C:\Users\testuser\AppData\Local\appium-desktop\app-1.5.0\resources\app\node_modules\appium\lib\appium.js:66:13)

Please suggest me what i did wrong. I was executed php using command line
D:\xamp\htdocs\appium\sample-code\examples\test>php mytest.php

Thanks,
Jay