backend code
`$postdata = json_decode( file_get_contents( "php://input" ), TRUE );
//$id = $postdata[ "email" ];
//$name = $postdata[ "password" ];
$result[ 'response' ] = "Success";
$result[ 'username' ] = "Mohammad Tariq Shamim";
// Store values in an array
$returnValue = array( $result );
$array['data'] = $returnValue;
// Send back request in JSON format
echo json_encode( $array );
//echo json_encode( array( 'response' => 'No data found for ' . $_POST[ 'email' ] ) );