PHP - Using Php To Calculate Difference.

Hi,
  In Php ,  What is the different ebtween  abc() and @abc() ???
Please advice .

This is going to seem like a stupid question but I'm curious about it anyway.

Isn't isset and !empty do the same?

Considering security, is there a disadvantage in using $_REQUEST?

Actually what's the difference between
Code: [Select]
if(...)
and
Code: [Select]
if(isset(...)

I am working with wordpress and I see a lot of "if" statements done like this

if(condition):
    do something
endif;


I have always done it like so

if(condition) {
  do something

}

what is the difference? does the first method have any advantages over the second method?

I am having trouble getting this to work what am I doing wrong?


<p class="tenTitle"><p class="tenTitle">Module 4i: Profit / Loss Forecast<br />


<?php

   
   // NAME STEP AND GIVE VALUE TO QUESTION VARIABLES SO ERROR CHECKING DOES NOT HAVE TO BE RECREATED FOR EVERY PAGE
   $stepNumber = '4i';
   $numQuestions = '9';
   
   //get values from the $_post array:
   $totalRev = $_POST['revenue'];
   echo "totalRev: ".$totalRev."<br />";
   $vCost = $_POST['cost'];
   echo "vCost: ".$vCost."<br />";
    $overheadCost = $_POST['overhead'];
   echo "overheadCost: ".$overheadCost."<br />";
   $taxes = $_POST['taxes'];
      echo "taxes: ".$taxes."<br />";
      $otherIncome = $_POST['other']; 
   echo "other: ".$other."<br />";


   //Calculate the gross profit:
   $gross = $totalRev - $vCost;
   echo "gross: ".$gross."<br />";

   //Calculate the net profit:
   $netProfit = $gross - $overheadCost;
   echo "netProfit: ".$netProfit."<br />";
   
        // Calculate Income after taxes:
        $afterTaxes = $netProfit - $taxes;
      echo "afterTaxes: ".$afterTaxes."<br />";
      
      // Calculate the Total Income:
        $totalIncome = $afterTaxes + $otherIncome;
      echo "totalIncome: ".$TotalIncome."<br />";

   // Print out the results
   print ' <table border="1" cellpadding="4" cellspacing="3" width="350">
      <tr>
          <td align="left" valign="top" border="1">
               Total Revenue</td><td><input type="text" style="40"       name="totalRev" value="'.$totalRev.'">
               
            </td>
         </tr>
           
            <tr>
        <td align="left" valign="top" border="1">
               Less: Variable Cost</td><td><input type="text" style="40" name="vCost" value="'.$vCost.'">
               
            </td>
         </tr>
           
            <tr>
          <td align="left" valign="top" border="1">
               Gross profit</td><td><input type="text" style="40" name="grossProfit" value="'.$GrossProfit.'">
               
            </td>
         </tr>
            <tr>
          <td align="left" valign="top" border="1">
               Less: Overhead Cost</td><td>
               <input type="text" style="40" name="overhead" value="'.$overheadCost.'">
            </td>
         </tr>
           
            <tr>
          <td align="left" valign="top" border="1">
               Net Profit</td><td>
               <input type="text" style="40" name="netProfit" value="'.$netProfit.'">
            </td>
         </tr>
            <tr>
          <td align="left" valign="top" border="1">
               Taxes</td><td>
               <input type="text" style="40" name="taxes" value="'.$taxes.'">
            </td>
         </tr>
            <tr>
          <td align="left" valign="top" border="1">
               Profit After Taxes</td><td>
               <input type="text" style="40" name="profitAfterTaxes" value="'.$profitAfterTaxes.'">
            </td>
         </tr>
            <tr>
          <td align="left" valign="top" border="1">
               Other Income</td><td>
               <input type="text" style="40" name="otherIncome" value="'.$otherIncome.'">
            </td>
         </tr>
            <tr>
          <td align="left" valign="top" border="1">
               Net Income</td><td>
               <input type="text" style="40" name="netIncome" value="'.$netIncome.'">
            </td>
         </tr>
           <tr>
              <td colspan="2" align="left" valign="top" border="1">
                <input type="submit" name="submit" id="Submit" value="Calculate" />
              </label></td>
              </tr>
      
   </table></form>';   


   
   // DEFINE SESSION VARIABLES
      $_SESSION['email']=$_POST['email'];
      $_SESSION['emailCc']=$_POST['emailCc'];
      $_SESSION['name']=$_POST['name'];
      
   // DEFINE VARIABLES FOR MAILING TO USER AND BUZGATE
      $to = 'askbuz@buzgate.org,'.$_POST['email'];
      $email_subject = "Step ".$stepNumber." in Buzgate's Five Step Program";
      
      for ($i = 1; $i <= $numQuestions; $i++) {
         $eBodyQuestions .= $questions[$i]."\n"
      .$_POST['data'.$i]."\n";
      }
      
      $email_body = $eBodyQuestions;
      $headers = "From:".$_POST['email'];
      
   //PLACE VARIABLES IN MAIL FUNCTION
      mail($to, $email_subject, $email_body, $headers);
      
   // DEFINE VARIABLES FOR MAILING TO USER AND BUZGATE
      $toCc = $_POST['emailCc'];
      $email_subjectCc = "Step ".$stepNumber." in Buzgate's Five Step Program from ".$_POST['name'];
      $email_bodyCc = $_POST['name']." has sent this to you from www.BUZGate.org/8.0/".$state_abbrv_low."/".$page_name."\n
      Please contact us at askbuz@buzgate.org if you have received this in error.\n";
      
      $email_bodyCc = $email_bodyCc.$eBodyQuestions;
      $headersCc = "From:askbuz@buzgate.org";
      
   //PLACE VARIABLES IN CC MAIL FUNCTION
      mail($toCc, $email_subjectCc, $email_bodyCc, $headersCc);
      
   
      
      
      
   // DISPLAY RESPONSE TO CORRECTLY FILLING OUT FORM
      echo "<p class='textCenter'>Thank you ".$_POST['name']." for completing Step ".$stepNumber."</p>
      
      <p class='textCenter'><a href='five_steps_4summary.html'>Click here</a> to continue to 4Summary</p>
      
      <p class='textCenter'>Or <a href='five_steps_".$stepNumber.".html'>try this form again</a>.</p>";
   
?>

hi all!
i have 2 tables:

PRODUCTS
id_prod, id_cat, date, prod_name

CATEGORIES
id_cat, cat_name

My goal is obtain the average (day and month) of all products inserted by users in this format:

category Hardwa avg daily 20, month 100
category Components: avg daily 2, month 15
and so on.

PS: the 'date' field is unix timestamp (int 10).

Can you help me?

I can't seem to figure out how to calculate the score the user gets when they hit the score button.

I figured it would look something like this...

$result_score = $right / 9 * 100.... but I've tried a few methods and I can't seem to figure out why its not working.


Here is my code for the application....


Code: [Select]
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Multiplication Test</title>
</head>

<body>

<?php

require_once('database.php');






define ('ROWS', 3);
define ('COLS', 3);
define ('MAX_NUMBER', 12);
date_default_timezone_set('America/New_York');



if (isset($_POST['btn_score']))
{

$result_name= $_POST['result_name'];
$result_score= $_POST['result_score'];

$result_score = / 9 * 100;



$sql = "INSERT INTO results (result_name, result_score, result_date_time) VALUES ('$result_name','$result_score', NOW());";


$db->exec($sql);







//print_r ($_POST);
$time1 = $_POST['ts'];
$time1_object = new DateTime($time1);
$now = new DateTime();
$time_span = $now->diff($time1_object);

$minutes = $time_span->format('%i');
$seconds = $time_span->format('%s');
$seconds+= $minutes * 60;

echo "It took $seconds seconds to complete the test<hr />";



foreach ($_POST as $problem => $answer)
{
if ($problem <> "btn_score" && $problem <> "ts")
{
//echo "$problem -- $answer <br />";
$problem = explode('_', $problem);
$num1 = $problem[2];
$num2 = $problem[3];



$right = $num1 * $num2;


if ($answer != $right)
{
echo "$num1 * $num2 = $answer , The right answer is $right<br />";
}








}
}
}









?>

<h1>Multiplication Test</h1>

<form name="lab5" method="post" action="lab5b.php">
<?php
$now = new DateTime();
//echo $now->format('Y-m-d H:i:s');
echo "<input type='hidden' name='ts' value='" . $now->format('Y-m-d H:i:s') . "'>";
?>
<table border="1" cellspacing="5" cellpadding="5">

<?php


$no_of_problems = 0;
for ($row=0; $row<ROWS; $row++)
{
echo "<tr>";
for ($col=0; $col<COLS; $col++)
{
$num1 = mt_rand(1,MAX_NUMBER);
$num2 = mt_rand(1,MAX_NUMBER);

echo "<td>$num1 * $num2 </td>";
echo "<td><input type='text' size='2' name=${no_of_problems}_mult_${num1}_${num2}></td>";
$no_of_problems++;
}
echo "</tr>";
}
$colspan = 2 * COLS;
echo "<tr><td colspan=$colspan align='right'><input type='submit' value='Score' name='btn_score'></td></tr>";
?>

</table>

<br>
<br>

<label for="result_name">Student Name:</label>
<input type="text" id="result_name" name="result_name" /><br />
</form>
<br>
<br>





</body>
</html>

I have an array of appointment start times throughout a day. All appointments last 30 mins.

I also have a list of times that staff are available to meet these appointment times (can be in any format, array etc.)

I need to ensure the appointment times are fully covered by members of staff.

E.g.
Code: [Select]

$appointmentStart[] = "09:30";
$appointmentStart[] = "10:00";
$appointmentStart[] = "11:00";
$appointmentStart[] = "12:30";
$appointmentStart[] = "13:30";
$appointmentStart[] = "15:00";
$appointmentStart[] = "17:00";

$staffMembers[] = "09:00*12:00";
$staffMembers[] = "13:00*16:00";
$staffMembers[] = "15:00*18:00";

In the above case, no, there are not enough staff members to cover this as nobody works from 12:00 to 13:00. I only really need a yes or no. Don't worry about staff breaks, they never work more than 3 hours each at a time.

Thanks in advance for any help.

Hello all,
The exact thing that i need is to calculate how much days there is in between two dates.
The only problem is that every thing that i found dont care about leap year
Anyone have a function to do that?

i have date of birth stored as DATE type in mysql.  i tried this so it would show the age but it comes up blank.

Code: [Select]
$getprof = mysql_query("SELECT * FROM Profile WHERE username='$search'")or die(mysql_error());

while($rowprof = mysql_fetch_assoc($getprof))
{

$username1 = $rowprof['username'];
$location = $rowprof['location'];
$gender = $rowprof['gender'];
$dateofbirth = $rowprof['dateofbirth'];
$information = $rowprof['information'];
}

function GetAge($dateofbirth)

{

        // Explode the date into meaningful variables

        list($BirthYear,$BirthMonth,$BirthDay) = explode("-", $dateofbirth);

        // Find the differences

        $YearDiff = date("Y") - $BirthYear;

        $MonthDiff = date("m") - $BirthMonth;

        $DayDiff = date("d") - $BirthDay;

        // If the birthday has not occured this year

        if ($DayDiff < 0 || $MonthDiff < 0)

          $YearDiff--;

        return $YearDiff;

}

echo $YearDiff;

I have an HTML table with the following columns:
- Event
- Price
- # of Attendees
- Total
- Choose One

The values are populated from a database, and I am using a loop to create the Table.

The problem is that I have some syntax error where I am trying to calculate the Total Ticket Price?!

Can someone help me figure what is wrong with my code?

Code: [Select]
<!-- Body -->
<tbody>
<?php
// Fetch Comment record.
$x=0;
while (mysqli_stmt_fetch($stmt)){
//<!-- Row 1 -->
echo '
<tr>
<th scope="row" class="headerCol">';
echo 
$eventName . '<br />' .
$eventLocation . '<br />' .
$eventDate . '
</th>
<td class="col2">' .
$eventPrice .
'<input type="hidden" name="eventCost[' . $x . ']" value="' . $eventPrice . '" />
</td>
<td class="col3">
<select name="eventAttendees[' . $x . ']">
<option value="">--</option>
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
<option value="4">4</option>
</select>
</td>
<td class="col4">' . $eventCost*eventAttendees[$x] . '</td>
<td class="col5">
<input name="eventChosen[' . $x . ']" type="submit" value="Buy Tickets" />
</td>
</tr>';
}
?>
</tbody>

What I am trying to do/say on each row is "Take the Event Price and multiple it times the # of Attendees selected in the Row's Drop-Down field."

Thanks,


Debbie

Hi

I'm trying to figure out how to calculate how long since a datevariable I have stored is from whenever the page is loaded..

I currently have a stored datevariable in the format: YYYY-MM-DD H:m:s  ... So basically what I wish to accomplish is figuring out whenever i load the page which has stored this variable, how much time has passed. I want it to show up as for example :  '10 minutes ago'..  '1 hour 25minutes ago'  if it's the same day.. if its more than 1 day old it's enough to show only the number of days.....'1week 3 days ago' etc etc