repair-calendar.php coding

<?php
ini_set('display_startup_errors',1);
ini_set('display_errors',1);
error_reporting(-1);
?>

<!DOCTYPE html>
<html>
<head>
<title>IT Done Right Repairs Calendar</title>

<link rel='stylesheet' href='fullcalendar.css' />

<script src='lib/jquery.min.js'></script>
<script src='lib/moment.min.js'></script>
<script src='fullcalendar.min.js'></script>

<script src='js/jquery-1.9.1.min.js'></script>
<script src='js/jquery-ui-1.10.2.custom.min.js'></script>

<script>

 $(document).ready(function() {
  var date = new Date();
  var d = date.getDate();
  var m = date.getMonth();
  var y = date.getFullYear();


  var calendar = $('#calendar').fullCalendar({
	  firstDay:1,
   editable: true,
   header: {
    left: 'prev,next today',
    center: 'title',
    right: 'month,agendaWeek,agendaDay'
   },

   events: "http://localhost:8888/admin/repairs-calendar/events.php",

   // Convert the allDay from string to boolean
   eventRender: function(event, element, view) {
    if (event.allDay === 'true') {
     event.allDay = true;
    } else {
     event.allDay = false;
    }
   },
   selectable: true,
   selectHelper: true,
   select: function(start, end, allDay) {
   var title = prompt('Event Title:');
   var url = prompt('Type Event url, if exits:');
   if (title) {
   var start = $.fullCalendar.moment(start).format();
   var end = $.fullCalendar.moment(end).format();
   $.ajax({
   url: 'http://localhost:8888/admin/repairs-calendar/add_events.php',
   data: 'title='+ title+'&start='+ start +'&end='+ end +'&url='+ url ,
   type: "POST",
   success: function(json) {
   alert('Added Successfully');
   }
   });
   calendar.fullCalendar('renderEvent',
   {
   title: title,
   start: start,
   end: end,
   allDay: allDay
   },
   true // make the event "stick"
   );
   }
   calendar.fullCalendar('unselect');
   },

   editable: true,
   eventDrop: function(event, delta) {
   var start = $.fullCalendar.formatDate(event.start, "yyyy-MM-dd HH:mm:ss");
   var end = $.fullCalendar.formatDate(event.end, "yyy-MM-dd HH:mm:ss");
   $.ajax({
   url: 'http://localhost:8888/admin/repairs-calendar/update_events.php',
   data: 'title='+ event.title+'&start='+ start +'&end='+ end +'&id='+ event.id ,
   type: "POST",
   success: function(json) {
    alert("Updated Successfully");
   }
   });
   },
   eventResize: function(event) {
   var start = $.fullCalendar.formatDate(event.start, "yyy-MM-dd HH:mm:ss");
   var end = $.fullCalendar.formatDate(event.end, "yyy-MM-dd HH:mm:ss");
   $.ajax({
    url: 'http://localhost:8888/admin/repairs-calendar/update_events.php',
    data: 'title='+ event.title+'&start='+ start +'&end='+ end +'&id='+ event.id ,
    type: "POST",
    success: function(json) {
     alert("Updated Successfully");
    }
   });

},
eventClick: function(event) {
var decision = confirm("Do you really want to delete this?");
if (decision==true) {
$.ajax({
url: 'http://localhost:8888/admin/repairs-calendar/delete_events.php',
data: '&id=' + event.id+'$id='+ event.id,
type: "POST",
});
$('#calendar').fullCalendar('removeEvents', event.id);
} else {
}
}

  });

 });

</script>

<style>
#calendar {
  width: 900px;
  margin: 0 auto;
  }
</style>

</head>
<body>

<div id="logo">
<img src="images/logo/it-done-right.jpg" alt="" title="">
</div>

<?
session_start();
if($_SESSION['user']==''){
 header("Location:../index.php");
}else{
 include("../config.php");
 $sql=$dbh->prepare("SELECT * FROM users WHERE id=?");
 $sql->execute(array($_SESSION['user']));
 while($r=$sql->fetch()){
  echo "<div class='home-content'>";
  echo "<center><h2>Hello, ".$r['username']."</h2>";
  echo "<a href='../logout.php'>Log Out</a></center>";
  echo "</div>";
 }
}
?>

<div id='calendar'></div>

</body>
</html>