PHP - Php Calculation Help

Dear All,

I am trying to fetch the sum of a column for current date and subtract a value from the sum for currently selected record. The query i build works fine in MySql but when the same query i placed in php no result it's blank. Below is the query.

 

 <?php
//Calculation for no of paxs.
 $query2=mysqli_query($con,"SELECT SUM(noopaxs-gattl) FROM tblsupvisitor where date(EnterDate) = CURDATE() || gst = 'INH' || gst = 'IN' GROUP BY confno");
$calc_no_paxs_for_today=mysqli_fetch_row($query2);
$gattl=$calc_no_paxs_for_today['gattl'];
 ?> 

 

and her is the assignment to the textbox.

 

				<div class="row form-group">
                               <div class="col col-md-3">
                               <label for="textarea-input" style="color: purple" class=" form-control-label"><strong>Total No. Of Adults</strong></label>
                                                </div>

                                                <div class="col-12 col-md-9">
                                                    <input name="gattl" id="gattl" rows="9" class="form-control" required="" value="<?php  echo $gattl;?>">

                                                </div>
                                                </div>

 

Any help in this regard will be highly appreciated.

 

Kind Regards,

Naveed.

This is a bit of a puzzle. Look at the sum and result below:

Code: [Select]
$markTotal += ($session['Mark'] / 100 * $session['SessionWeight']);
Result on Browser

Module: CHI2550 - Modern Database Applications     41.2 (this is $markTotal)

Session: AAB        72(this is $session['Mark'])      20% (this is  $session['SessionWeight'])  (The percentage signs are just add ons)

Session: AAE        67(this is $session['Mark'])      40%  (this is  $session['SessionWeight'])


As you can see the answer to the calculation above is right, the answer is 41 .2 as it adds up the two session marks, divide by 100 and then times it by the total amount of the percentage.

But I want to include a total mark where except it is out of the total session percentage (60% for above example), it is out of a 100% but I can not work as simple as that as in above example one session is worth more than other. I have worked out that the answer for the total mark of the above example out of 100% should be 69, but how do I achieve this in my calculation.

Thank you and any help is much appreciated

So how

Hi,

I have a calculation issue in my php. Below is my code:



$ Code: [Select]
moduletotal = 0;
$modulecount = 0;
$sessionweight = 0;
       
while ($row = mysql_fetch_array($result)){   

        $moduletotal += $row['Mark'];     
 
        $modulemark = (int)($moduletotal);  // Here and above is the calculation which is simply adding the total number of marks


// Below is the code that displays my results. The variable of the calculation is shown at the end of the last if statement (3rd one down)

$output = "";
$studentId  = false;
$courseId  = false;
$moduleId  = false;
         
if($studentId != $row['StudentUsername'])  {       

$studentId = $row['StudentUsername'];       
$output .= "<p><strong>Student:</strong> {$row['StudentForename']} {$row['StudentSurname']} ({$row['StudentUsername']})";   

   }   
   
  if($courseId != $row['CourseId']) {   

$courseId = $row['CourseId'];       
$output .= "<br><strong>Course:</strong> {$row['CourseId']} - {$row['CourseName']} <br><strong>Year:</strong> {$row['Year']}</p>";   

}   

if($moduleId != $row['ModuleId'])  {       

   $moduleId = $row['ModuleId'];       
   $output .= "<p><br><strong>Module:</strong> {$row['ModuleId']} - {$row['ModuleName']} {$row['Credits']} $modulemark</p>";   

  } 
   
   $output .= "<p><strong>Session:</strong> {$row['SessionId']} {$row['Mark']} {$row['Grade']} {$row['SessionWeight']}%</p>";
   
  }

 
echo $output;

      ?>The Results look like this at the moment (The answer the calculation is next to each Module):

Student: Mayur Patel (u0867587)
Course: INFO101 - Bsc Information Communication Technology 
Year: 3


Module: CHI2550 - Modern Database Applications 20 72 (72 is the answer to the calculation for the first module but this is incorrect at it should also add the 67 and thus become 139)

Session: AAB 72 A 20%

Session: AAE 67 B 40%


Module: CHI2513 - Systems Strategy 20 200 (200 is the answer to the calculation for this module but this is incorrect it should be only 61. But what it has done is that it has added the 72 and 67 from the first module and added it with the 61 in this module)

Session: AAD 61 B 50%



SO WHAT MY QUESTION IS HOW CAN I GET THE CALCULATION SO THAT IT ONLY ADDS UP EACH SESSION MARKS THAT BELONGS TO A MODULE ONLY? IN THE EXAMPLE ABOVE IT SHOULD ONLY ADD THE MARKS FOR SESSION AAB AND AAE IN THE MODERN DATABASE APPLICATIONS MODULE AND THEN WHEN IT GETS TO THE NEXT MODULE WHICH IS SYSTEMS STRATEGY, THE MARKS FOR THAT MODULE SHOULD START AGAIN AND ADD ON THE MARKS FOR THE SESSION AAD IN THAT MODULE. HOPEFULLY YOU UNDERSTAND AND THANK YOU

Below is the query if you want to look at it:

Code: [Select]
$query = "
          SELECT c.CourseName, 
st.CourseId, st.Year, st.StudentUsername, st.StudentForename, st.StudentSurname,
s.ModuleId, s.SessionId, s.SessionWeight,
gr.Mark, gr.Grade
m.ModuleName, m.Credits,
          FROM Course c
          INNER JOIN Student st ON c.CourseId = st.CourseId
          JOIN Grade_Report gr ON st.StudentId = gr.StudentId
          JOIN Session s ON gr.SessionId = s.SessionId
          JOIN Module m ON s.ModuleId = m.ModuleId
          WHERE
          (st.StudentUsername = '".mysql_real_escape_string($studentid)."')
          ORDER BY c.CourseName, st.StudentUsername, m.ModuleName, s.SessionId
          ";

The time dosen't calculate correctly!!! 

When the local time is 3:15pm on16th Nov 2010 - "Time Expired" dosen't show. When I echo $drawT-time() it shows 60000 odd.

What's wrong here?

$drawH = 15;
$drawM = 15;
$drawM = 11;
$drawD = 16;
$drawY = 2010;
$cutoffT = 4;
$drawT = mktime($drawH, $drawM, 0, $drawM, $drawD, $drawY);
date_default_timezone_set("Australia/Melbourne"); 
if($drawT-time() < $cutoffT*60)
{
echo "Time Expired.";
}

Hi,

I have an attendance system that calculates time in and time out for each day. I have a db field with time datatype that stores the total time for one day, say for example for today the total is 7:15:00 (7 hours and fifteen minutes).  i am making a report to show all attendance records for a week. I need to show total of hours a week which is around 35-40 hours so how can this be done?

screenshot of what i have.

Edited March 15, 2020 by ramiwahdan
typo error