PHP - Display Events Under Specified Month....

 <td><?php
	$in = "SELECT sales_invoice.invoice_id as INID, DATE_FORMAT(sales_invoice.date_invoiced,'%M') AS month, sales_invoice_line_items.invoice_id, SUM(sales_invoice_line_items.sub_total) AS Total, SUM(sales_invoice_line_items.tax_amount) AS total_tax FROM sales_invoice INNER JOIN sales_invoice_line_items ON sales_invoice.invoice_id=sales_invoice_line_items.invoice_id GROUP BY sales_invoice.invoice_id, DATE_FORMAT(sales_invoice.date_invoiced, '%Y-%m')";
	
	$in1 = mysql_query($in) or die (mysql_error());
	$total=0;
	$tax =0;
	while($income = mysql_fetch_array($in1))
	{
		
		$total +=$income['Total']; 
		$tax +=$income['total_tax'];
		echo $total - $tax; }
    ?>
    
    </td>

<td><?php
	$in = "SELECT purchase_invoice.invoice_id as INID, DATE_FORMAT(purchase_invoice.date_invoiced,'%M') AS month, purchase_invoice_line_items.invoice_id, SUM(purchase_invoice_line_items.sub_total) AS Total, SUM(purchase_invoice_line_items.tax_amount) AS total_tax FROM purchase_invoice INNER JOIN purchase_invoice_line_items ON purchase_invoice.invoice_id=purchase_invoice_line_items.invoice_id GROUP BY purchase_invoice.invoice_id, DATE_FORMAT(purchase_invoice.date_invoiced, '%Y-%m')";
	
	$in1 = mysql_query($in) or die (mysql_error());
	$total=0;
	$tax =0;
	while($income = mysql_fetch_array($in1))
	{
		
		$total +=$income['Total']; 
		$tax +=$income['total_tax'];
		echo $total - $tax; }
    ?>
    
    </td>

<div class="span8">
                       <div class="w-box w-box-green">
                            <div class="w-box-header"></div>
                            <div class="w-box-content">
                                <div id='calendar_json'></div>
                            </div>
                            <div class="w-box-footer">
                                <p class="f-text">JSON events fetched from a script</p>
                            </div>
                        </div>
                    </div>  
                </div>

 jsonEvents: function() {
            if($('#calendar_json').length) {
                $('#calendar_json').fullCalendar({
                    header: {
                        left: 'month,agendaWeek,agendaDay',
                        center: 'title',
                        right: 'prev,next'
                    },
                    buttonText: {
                        prev: '<i class="icon-chevron-left icon-white cal_prev" />',
                        next: '<i class="icon-chevron-right icon-white cal_next" />'
                    },
                    editable: true,
                    firstDay: 1, // 0 - Sunday, 1 - Monday
                    events: "php_helpers/json-events.php",
                    eventDrop: function(event, delta) {
                        alert(event.title + ' was moved ' + delta + ' days\n' +
                            '(should probably update your database)');
                    }
                });
            }

include("connect.php");
$year = date('Y');
$month = date('m');


//$db=public_db_connect();
$year = date('Y');
$month = date('m');


$command = "SELECT * FROM planner";


$result = mysql_query($command) or die (mysql_error());


while ($row = mysql_fetch_array($result)) {
echo "hi";
    //$start = date("D, j M Y G:i:s T", strtotime($row['start']));
    //$end = date("D, j M Y G:i:s T", strtotime($row['end_time'])); 
$start = date("Y-m-d", strtotime($row['from_time']));
//$start = "$year-$month-20";
    $myid =  $row['plan_id'];
$eventsArray['plan_id'] =  (int)trim($myid); 
    //$eventsArray['title'] = $row['title'];  
$title = $row['company']; 
//$title = $row['title']; 
//echo $title;
$eventsArray['company'] = $title; 
    $eventsArray['from_time'] = $start;
$eventsArray['to_time'] = $start;
    $eventsArray['url'] = "edit_calendar.php?calendarid=".$row['plan_id'];
    // $eventsArray['end'] = $end;
    // $eventsArray['allDay'] = false;
    $events[] = $eventsArray;
}


echo json_encode($events);

I am a little confused with the difference between Symfony Events and Event Listners and Doctrine Events.

The Doctrine events look pretty straight forward and are primary used for entity persistence, and I have outlined my understanding below:

I am more confused with the Symfony events and my interpretation as listed below is likely incorrect.

Are they used for totally different purposes or can one use Symfony events to also deal with entities?  Where would one want to use these Symfony events?

Is there a reason why Doctrine Lifecycle Subscribers are located in src/EventListener and not src/EventSubscriber

Are Doctrine Lifecycle and Entity Listeners really only for a single event as I interpret the documentation states, or is it one method per Doctrine event such as the following?

    App\EventListener\SearchIndexer:
        tags:
            -
                name: 'doctrine.event_listener'
                event: 'postPersist'
            -
                name: 'doctrine.event_listener'
                event: 'postUpdate'