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Time slot Booking

Ragavi

By Ragavi
in PHP Coding Help

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Ragavi Newbie

Ragavi

Posted
Posted (edited)

Hello Friends,

I am trying to execute Time slot booking for an application. - When user selects a date - 
In a calendar I have monthly calendar dates and (5) time slot for booking. (9-10, 10-11, 11-12, 12-1, 1-2)

Each time slot can be booked by 2 users

User 1 selected a date (2nd March)and selected a time slot (10:00 - 11:00 AM). 

User 2 selected a date (2nd March)and selected a time slot (10:00 - 11:00 AM). 
When User 3 try to book a slot (10:00 - 11:00 AM) on 2nd March -   I would like to disable or display  "Slot Not Available" for that Time slot. 

Please find the script below. Your help is really appreciated. 

<?php 
include('database.php');
$fname="";
$lname="";
$email="";
$phone="";
$date="";
if(isset($_POST['fname'])){ $fname=$_POST['fname'];}
if(isset($_POST['lname'])){$lname=$_POST['lname'];}
if(isset($_POST['email'])){$email=$_POST['email'];}
if(isset($_POST['phone'])){$phone=$_POST['phone'];}
if(isset($_POST['date'])){$date=$_POST['date'];}
 else $date=date("m-d-Y")

$result=mysqli_query($conn,"SELECT exam_time,count()from test_booking_confirm where  DATEDIFF('exam_date',DATE_FORMAT('"+$date+"','%m-%d-%Y'))=0  group by exam_date,exam_time having count()>1");
$slots=array();
$i=0;
if (mysqli_num_rows($result) != 0)
{
     while($row = mysqli_fetch_assoc($result)) {
         $slots[$i]=$row["exam_time"];
         $i++;
    }
}
?>

<!doctype html>
<html>
<head>
<title></title>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
        <link rel="stylesheet" href="css/style.css" />
    <link rel="stylesheet" href="css/bootstrap.min.css" />
    <!-------date picker------->
    <link rel="stylesheet" href="css/jquery-ui.css" />
    <script src="js/jquery.js"></script>
    <script src="js/jquery-ui.js"></script>
    <script>    
    $(document).ready(function(){
    $("#datepicker").datepicker({
    beforeShowDay: function(date)
        {
        var day=date.getDay();
        if(day==2)
        {
        return [false];
        }
        else
        {
        return [true];
        }
        }
    });
    });
    </script>
    <script>
     $(document).ready(function() {
            $('#datepicker').datepicker();
             $('#datepicker').datepicker("show");
              });
        
   </script>
    
<script>
  function setToday()
  {
      var n =  new Date();
y = n.getFullYear();
m = n.getMonth() + 1;
d = n.getDate();
var x=m + "/" + d + "/" + y;
document.getElementById("datepicker").value = x;
      }
function datechange(vv)
{
    document.myform.action="test_booking.php";
    document.myform.submit();
    
    }
</script>

    
        
    </head>
    <body OnLoad="document.myform.fname.focus();setToday()">

    
        <div class="container register">
                <div class="row">
                    <div class="col-md-3 training_bk register-left">
                        <img src="images/ESStechlogo.png" alt=""/>
                        <h3>Welcome</h3>
                        <p>Lorem Ipsum is simply dummy text of the printing and typesetting industry.</p>
                        
                    </div>
                    
                    <div class="col-md-9 register-right">
                     <form method="post" action="test_booking_review.php" name="myform">
                        <div class="tab-content" id="myTabContent">
                            <div class="tab-pane fade show active" id="home" role="tabpanel" aria-labelledby="home-tab">
                                <h3 class="register-heading">Book your Training</h3>
                                <div class="row register-form">
                                    <div class="col-md-6">
                                    
                                        <div class="form-group">
                                            <input type="text" autofocus name="fname" required class="form-control" placeholder="First Name*" />
                                        </div>
                                        <div class="form-group">
                                            <input type="text" name="lname" required class="form-control" placeholder="Last Name*" />
                                        </div>
                                        
                                    
                                        <h5>Your Preferred Slot</h5>
                                         <div class="form-group">
                                         <!--<div id="datepicker" required name="date" ></div>-->
                                               <input type="text"  id="datepicker" required name="date"  placeholder="mm/dd/yyyy" class="form-control" onChange ="datechange(this.value)">
                                                
                                            
                                            </div>
                                            
                                    </div>
                                    <div class="col-md-6">
                                    <div class="form-group">
                                            <input type="email" name="email" required class="form-control" placeholder="Email*" />
                                        </div>
                                     <div class="form-group">
                                            <input type="number" name="phone" required class="form-control" placeholder="Phone*" />
                                        </div>
                                     
                                         <!--<div class="form-group">
                                            <select class="form-control">
                                                <option class="hidden"  selected disabled>City</option>
                                                <option>option</option>
                                                <option>option</option>
                                                <option>option</option>
                                            </select>
                                        </div>-->
                                        <div class="form-group">
                                            <div class="maxl">
                                            <?php
                                            if (!in_array("08:00AM TO 09:00AM", $slots))
                                            {

                                            ?>
                                                <label class="radio inline"> 
                                                    <input type="radio" name="time" value="08:00AM TO 09:00AM" checked>
                                                    <span>08:00AM TO 09:00AM (Available)</span> 
                                                </label>
                                                <?php
                                                }
                                            if (!in_array("09:00AM TO 10:00AM", $slots))
                                            {
                                            ?>
                                            
                                                <label class="radio inline"> 
                                                    <input type="radio" name="time" value="09:00AM TO 10:00AM">
                                                    <span>09:00AM TO 10:00AM (Available)</span> 
                                              </label>
                                        <?php
                                                }
                                            if (!in_array("10:00AM TO 11:00AM", $slots))
                                            {
                                            ?>

                                                 <label class="radio inline"> 
                                                    <input type="radio" name="time" value="10:00AM TO 11:00AM">
                                                    <span>10:00AM TO 11:00AM (Available)</span> 
                                                </label>
                                        <?php
                                                }
                                            if (!in_array("11:00AM TO 12:00PM", $slots))
                                            {
                                            ?>

                                                 <label class="radio inline"> 
                                                    <input type="radio" name="time" value="11:00AM TO 12:00PM">
                                                    <span>11:00AM TO 12:00PM (Available)</span> 
                                                </label>
                                        <?php
                                                }
                                            if (!in_array("12:00PM TO 01:00PM", $slots))
                                            {
                                            ?>

                                                <label class="radio inline"> 
                                                    <input type="radio" name="time" value="12:00PM TO 01:00PM">
                                                    <span>12:00PM TO 01:00PM (Available)</span> 
                                                </label>
                                        <?php
                                                }
                                            ?>

                                            </div>
                                        </div>
                                        <input type="submit" class="btnRegister"  value="Continue"/>
                                    </div>
                                    
                                </div>
                            </div>
                           
                        </div>
                        </form>
                    </div>
                    
                </div>

            </div>
             
    </body>

 

Edited by Barand
Added code tags
Link to comment
https://forums.phpfreaks.com/topic/310195-time-slot-booking/
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Barand Prolific Member

Barand

Posted
Posted (edited)

In future, use the <> button in the toolbar when posting code. (I've done it for you this time)

In your query 

SELECT exam_time
     ,count()
FROM test_booking_confirm 
WHERE  DATEDIFF('exam_date',DATE_FORMAT('"+$date+"','%m-%d-%Y'))=0  
GROUP BY exam_date,exam_time 
HAVING count()>1

the WHERE clause is FUBAR.

  • when storing or working with dates in a db the format should be yyyy-mm-dd (DATE type)
  • in PHP, the concatenation operator is a "." and not a "+"
  • column names should not be in single quotes
  • user-provided data should not be put directly into the query, used prepared statements

Assuming the exam_date is the correct DATE type and format, make sure $date is the correct format EG 

$date = date('Y-m-d');

$stmt = $conn->prepare("SELECT exam_time
                        FROM test_booking_confirm 
                        WHERE  exam_date = ?
                        GROUP BY exam_date,exam_time 
                        HAVING count(*)>1
                        ");
$stmt->bind_param('s', $date);
$stmt->execute();
$stmt->bind_result($exam_time);

$slots=array();

while($stmt->fetch {
    $slots[] = $exam_time;
}

But, personally, I'd look for slots with a count < 2 and just display those available.

 

Edited by Barand
Link to comment
https://forums.phpfreaks.com/topic/310195-time-slot-booking/#findComment-1575124
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