PHP - Php Math Equations

is there a math function that give you an integer value when u divide 2 numbers?
ie in 7/3  i just want 2 as a result not floating number.
thanks in advance.

Hi guys.   I'm using php to randomly generate a simple math verification question.  But, I'm having a hard time validating the input.  Can someone please tell me what I'm doing wrong?

Thank you
 


} else if(trim($verify) != $_SESSION['UserData']['Math'][0]+$_SESSION['UserData']['Math'][1]){
     $error = '<div class="error_message">Attention! The verification number you entered is incorrect.</div>';
}



<?php
echo "<span class='label'><span class='required'>*</span>What is ".$_SESSION['UserData']['Math'][0]." +    ".$_SESSION['UserData']['Math'][1]."?</span> ";
?>

<input name="verify" type="text" id="verify" size="3" value="<?=$verify;?>" /><br /><br />

   

Hello Everyone,

I'm a newbie trying to improve my script below.
The script works fine but I would like to add the 3 radio buttons computations enhancements
Ergo,  if a user chooses 'Matte Paper" a 10% would be added to the Price Quote result.
If a user chooses ' Gloss Paper,  a 10% would be added to the Price Quote result.
If a user chooses 'Canvas" , a 20 % would be added to the Price Quote result.
If someone could assist with the math or post me a helpful link it would be greatly appreciated.
Thank you.

Paul from Melbourne, Australia.


<div style="border:dashed 1px; width:570px;">

<form method="post" action="<?php echo $_SERVER['php_SELF'];?>">

<p>
1. Enter the size (100w.x180h. cm) you want your picture printed:
Width
<input type="text" name="width" size="1"   maxlength="3"
value="0" onFocus="this.value=''; this.style.color='#ff0000';">
Height
<input type="text" name="height" size="1" value="0"  maxlength="3"
value="0" onFocus="this.value=''; this.style.color='#ff0000';">
</p>


<p>
2. Choose the printing material for your pictu
<input type="radio"  value="cms in Matte paper"  name="material" size="3"  maxlength="3" /> Matte Paper
<input type="radio"  value="cms in Gloss Paper:"  name="material" size="3"   maxlength="3" /> Gloss Paper
<input type="radio" value="cms in Canvas:"  name="material"  size="3"  maxlength="3" />  Canvas
</p>

<p>
3. Submit your info for our Price Quote below :
<input type="submit" name="submit" value="Submit" />
or:
<input type="submit" name="clear" value="Reset" />
</p>


<p>
5. Our Price Quote to print your artwork sized: 

<?php

$width = $_POST['width'];
/* if artwork wider than 101 cm no quote, exits*/
if ($width >=101)
{echo "Error!"; exit ;}

$height = $_POST['height'];
/* if artwork higher than 181 cm no quote, script exits */
if ($height >=181)
{echo "Error!"; exit ;}

$measurement = $_POST['measurement'];
$material = $_POST['material'];
$result = $width * $height;
echo "
$width
x
$height
$material
is: ";
echo "$".number_format($result,2). "" ;
?>
</p>

</form>
</div>

Hi guys!

Am trying to get hold of a PHP Math Expression Parser that follows correct precedence and executes custom functions. Can somebody share his scripts? or lead me to the right directions?

Hope you can help! Thanks a lot! My boss is gonna kill me soon. This is 1 week overdue already.

Jon

I am doing some simple math and it is spitting out very odd results.

//First Loop to get the values
$get_values = mysql_query("SELECT * FROM table");
while($values = mysql_fetch_array)){
$value_one += $values[value_one];
$value_two += $values[value_two];
}
$difference = $value_one - $value_two;
echo"$value_one - $value_two = $difference;

The database field types are DECIMAL(10,2). The output of the individual values is echoing the correct 0.00 format but after it loops for awhile the difference seems to come out differently. and have close to 5 or 6 places after the decimal. if i echo the values as it is looping and adding them it seems to not be adding correctly either. What am I doing wrong?

With this code, I am trying to create a guessing game. When I press the START button, I want it display a guess, highest, and the lowest number between 1-100. The highest number being 100, and the lowest being 1. I'm trying to get the math formula to do this equation (Guess = round((Highest +Lowest))/2. Can any one give me a hand.


Code: [Select]
<head>
<title>
Project 3
</title>
</head>
 
<body>
 
<h1>Guessing Game</h1>
<form method='post' action=''> <input type='submit' name='start' id='start' value='Start Game'>
<form method='post' action=''> <input type='submit' name='higher' id='higher' value='Higher'>
<form method='post' action=''> <input type='submit' name='lower' id='lower' value='Lower'>
<?php
if (isset($_POST['start'])) {






print"<input type = 'hidden' name = 'hdnCount' value = '$count'> 
<input type = 'hidden' name = 'hdntop' value = '$top'>
<input type = 'hidden' name = 'hdnbottom' value = '$bottom'>
<input type = 'hidden' name = 'hdnguess' value = '$guess'>";
}





if (isset($_POST['higher'])) { 

$count = $_REQUEST["hdnCount"];
$top = $_REQUEST["hdntop"];
$bottom = $_REQUEST["hdnbottom"];
$guess = $_REQUEST["hdnguess"];





print" <input type = 'hidden' name = 'hdnCount' value = '$count'> 
<input type = 'hidden' name = 'hdntop' value = '$top'>
<input type = 'hidden' name = 'hdnbottom' value = '$bottom'>
<input type = 'hidden' name = 'hdnguess' value = '$guess'>";


}



if (isset($_POST['lower'])) { 

$count = $_REQUEST["hdnCount"];
$top = $_REQUEST["hdntop"];
$bottom = $_REQUEST["hdnbottom"];
$guess = $_REQUEST["hdnguess"];





print" <input type = 'hidden' name = 'hdnCount' value = '$count'> 
<input type = 'hidden' name = 'hdntop' value = '$top'>
<input type = 'hidden' name = 'hdnbottom' value = '$bottom'>
<input type = 'hidden' name = 'hdnguess' value = '$guess'>";



}



?>


</form>
</body>
</html>

Code: [Select]
if ($user['amount'] >= 15.00){
   $user['max_stars'] = 3;
}
Ok and

Code: [Select]
if ($user['amount'] >= 20.00){
   $user['max_stars'] = 4;
}How can I write a function that will loop through the 15,20,25,30,35, all the way up to 600$ or if the max_Stars get's up to 80?

I really don't want to have 80 if functions in my code :\

Having to go into somebody else's code yet again! Gah! Originally the totaling page just subtracted a flat discount. But now the client wants to be able to subtract percentage discounts and 'per item' discounts. In the discount table I added a field to determine whether the discount chosen is to be applied as flat off total, flat per item, % off total, and % off each item. I also entered a field that can have a class id, in case this discount is only for that class. (the intention being that otherwise the discount is on anything)

I've got a session variable that generates something like : Array ( [217] => 1 [215] => 2 )
meaning 1 person in class #217, and 2 people in class 215.

$_SESSION['s_to_be_added'] = array_filter($_POST['participantqty']);

Then on the page I'm concerned with, I've been trying to write the script. I know I still need some math stuff figured out
 But how do I take the array, do the math, and then generate an overall cost for the whole thing? and this is just  the discounting? I don't even have a clue how to work in delimiting it if there's a class id.. did any of that make sense?

Code: [Select]
<?php

// the above is the array I want to use to 
$passed_array = array_filter($_SESSION['s_to_be_added']);

// this is the discount 'code' the user entered.
$discount = mysql_escape_string($_POST['discount']);

// just a donation added after everything.
$donation = mysql_escape_string($_POST['donation']);

// finding the discount that matches the discount 'code' entered.
$query_selectAllItems_events = "SELECT discount_amount,discount_type,workshop_link_1 FROM tbl_discount where discount_value = '$discount'";

    $result_all_events = mysql_query($query_selectAllItems_events);
$numRows_all_events = mysql_num_rows($result_all_events);
$num=mysql_num_rows($result_all_events); 
$z_row = mysql_fetch_array($result_all_events);
        
        // this is just a number: 1, 20, 90 etc.
        $discount_amount = $z_row['discount_amount'];
        
        /*this is 1,2,3,4 - for each type of discount 1- flat 2- flat per item
        3- discount on all, 4- discount per item */
        $discount_type = $z_row['discount_type'];
        
        // the workshop id if the discount is onlyh for this workshop
        $discount_link_1 = $z_row['workshop_link_1'];
        
        // just a description
$discount_name = $z_row['discount_name'];

        
if ($discount_type ==1) {
            /* flat discount on total here */
            $total = mysql_escape_string($_POST['total']);

$final_total = ($total - $discount_amount);
$final_total = ($final_total + $donation);
        }
        
        elseif ($discount_type ==2)) {
            /*  discount per item total here */
$total = mysql_escape_string($_POST['total']);

$final_total = ($total - $discount_amount);
$final_total = ($final_total + $donation);
        
        }
        
        elseif ($discount_type ==3)) {
            /* percentage discount on total here */
$total = mysql_escape_string($_POST['total']);

$final_total = ($total * ($discount_amount/100));
$final_total = ($final_total + $donation);
        
        }
        
        elseif ($discount_type ==4)) {
            /* percentage discount per item here */
$total = mysql_escape_string($_POST['total']);

$final_total = ($total * ($discount_amount/100));
$final_total = ($final_total + $donation);
        
        }
        
        ?>

Hi guys, I just decided to add an addition question in my site for submitting a form, not gonna say where coz one of you will most proberly try to prove it doesnt work! I have a feeling its easy enough for someone to send my form by getting the two variables and evaluating them. But how would they do that? and how would they know the names of the variables to send...?

Is there a way of doing a math captcha that cannot be hacked?

The title may not fit but only thing i could think of.

I am pulling data from MSSQL database table.... I need everything from that table but i need to do some basic math funcitons to the resulting data.

So the quesiton is should i do the math for this in the SQL query if so how do i pull all fields and do the math in an effcient way.

Or should i let php do the math for me after i get all the data i need. 

If it is better to use php how can i do this in a while loop and get the math result and not a printed equation.

Just looking for a few pointers never had to do math before with php

This topic has been moved to PHP Math Help.

http://www.phpfreaks.com/forums/index.php?topic=357542.0

This topic has been moved to PHP Math Help.

http://www.phpfreaks.com/forums/index.php?topic=350528.0

Website: http://novacms.vacau.com/index.php

I'm trying to make a calculator for this game I play, it's fully developed, but with one bug. It doesn't do the math right.

$goal = The amount of EXP (Experience Points) someone wants to get
$exp = The amount of EXP they currently have
$npcs_exp["exp"] = The amount of EXP the monster has

But, when they enter in the information, the calculation is all screwed up. When I do it, it seems to give me the same number EACH time.

The part where the calculation "goes down". Remember, I'm trying to see how many times you need to kill a NPC to achieve your goal.


//math
$npc_exp_extract = mysql_query("SELECT exp FROM npcs WHERE name='$npc'");
$npcs_exp = mysql_fetch_assoc($npc_exp_extract);

$amount = $goal / $npcs_exp["exp"];


Full code:


<?php
$exp = $_POST["exp"];
$npc = $_POST["npc"];
$goal = $_POST["goal"];

mysql_connect("removed", "removed", "removed");
mysql_select_db("a2248602_npcs");

if(!$goal || !$npc || !$exp)
{
echo "<center><form action='index.php' method='POST'>GOAL: <input type='text' name='goal'> Current XP: <input type='text' name='exp'>";
echo "NPC: <select name='npc'>";

$npc_extract = mysql_query("SELECT * FROM npcs");
while($npcs = mysql_fetch_assoc($npc_extract))
{
 echo "<option name='". $npcs['name'] ."'>". $npcs['name'] ."</option>";
}

echo "</select> <input type='submit'></form></center>";
}
else
{
//math
$npc_exp_extract = mysql_query("SELECT exp FROM npcs WHERE name='$npc'");
$npcs_exp = mysql_fetch_assoc($npc_exp_extract);

$amount = $goal / $npcs_exp["exp"];

if($amount=="1")
{
echo "You will need to kill a <b/>". $npc ."</b> <b>". $amount ."</b> more time. You earn ". $npcs_exp["exp"] ." XP for each kill from this NPC. | <a href='index.php'>Do another</a><br/><br/>";
}
else
{
echo "You will need to kill a <b/>". $npc ."</b> <b>". $amount ."</b> more times. You earn ". $npcs_exp["exp"] ." XP for each kill from this NPC. | <a href='index.php'>Do another</a><br/><br/>";
}
}

echo "<center>Made by Zaros from <a href='creation-x.net'>Creation-X</a></center>";
?>


Mod edit: DB credentials removed.

Hey.   So imagine this example...  

class FormulaEvaluator {
...... //Construct & variables here..
 
public function exec() {
//Missing some lines here, but you get the idea
$formula = $this->formula;
$context = (array) $this;
ob_start();
$res = eval('return ' . $formula . ';');
}
}
 
$formulaEvaluator = new FormulaEvaluator();
$formula = '10 * (($Test * 2) + ($Test2 / 3))';
$formulaEvaluator->formula = $formula;
$formulaEvaluator->Test = 20000;
$formulaEvaluator->Test2 = 300000;
$res = $formulaEvaluator->exec();
echo $res; //1400000

  The code we have is working as intended, but we want to avoid using eval. I know it's a pretty common question, and the answer is usually the same, but is there any way to do something similar without using eval?

 In a past post I mentioned that my ultimate goal of this is code is to query our SQL system for a start date and a stop date.  At both of those points, the query would spit out a value for that the column based on a determined time and day.  The first point would be a min or minUsage.  The second point would be max or maxUsage.  These points will be subtracted from each other to create a value.  See below.  Not that it matters but the value is the amount of kWh per months.     So, now, Min and Max are both defined below but I suspect the value is being truncated for each.  Also, Im not sure the calculation is right because I am getting an unexpected solution.  I am asking that someone look at this code and tell me what should be happening mathematically.  (down to the accuracy of the answer (pre calculation and post calculation)  It would help me better see my mistakes.    To give you an example of some data.  I have    Max ( or July 31)   total_energy_a =26872 total_energy_b =27619 total_energy_c =26175   Min ( or July 1) total_energy_a =20347 total_energy_a =20914 total_energy_a =19808   Max - Min  19597   With these numbers, would you expect this outcome from this code?   Thanks.

<?php
$sql = ";WITH TOTAL_KWH_SUMMER AS
(
SELECT CONVERT(VARCHAR(10),cdate,111)AS trans_date, datepart(hh, cdate) as trans_hour, comm_id, 
MIN((total_energy_a+total_energy_b+total_energy_c)/100) AS minUsage, 
MAX((total_energy_a+total_energy_b+total_energy_c)/100) as maxUsage, repeated
  FROM [radiogates].[dbo].[purge_data] 
  where comm_id='$comm_id' 
  group by comm_id, CONVERT(VARCHAR(10),cdate,111), datepart(hh, cdate), repeated
)
SELECT *, datepart(weekday, trans_date) as trans_date_day, datepart(month, trans_date) as 

trans_date_month, maxUsage - minUsage as totalUsage
FROM TOTAL_KWH_SUMMER 

where datepart(weekday, trans_date) IN ('1', '2', '3', '4', '5', '6', '7') 
AND DATEPART(MONTH, trans_date) IN ('5','6','7','8','9','10') 
and trans_date BETWEEN '$startdate2 00:00:01' AND '$enddate2 24:00:00' and repeated <> '1' ";
$query = sqlsrv_query($conn, $sql);if ($query === false){  exit("<pre>".print_r(sqlsrv_errors(), true));}while ($row = sqlsrv_fetch_array($query)){  	$sumUsageKWH += $row[totalUsage];}sqlsrv_free_stmt($query);?>