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Round calculation to the nearest pound

Posted on 2013-11-19
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Last Modified: 2013-11-25
Hi guys,

I have the following calc, how can I round it to the nearest pound? £2.50 would be £3.00 and £2.49 would be £2.00 etc...

<?php $TheVar = $rows_product[$i]['product_rrp'] - $rows_product[$i]['product_price']; ?>

Thanks,
Dean
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Question by:deanlee17
4 Comments
 
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Accepted Solution

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EmuL8_sw earned 500 total points
Comment Utility
Hi Dean,

You can use the normal round function integrated into php.
As described in the following documentation:
http://php.net/manual/en/function.round.php

Just take note of the data type you pass to this function, as it does not like strings that are not formatted correctly.

I suppose in your case it would be something like:
<?php 
$TheRRP = $rows_product[$i]['product_rrp'];
$ThePrice = $rows_product[$i]['product_price'];
$TheVar = $TheRRP - $ThePrice;
$TheVar = round($TheVar);
?>

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This piece of code is obviously very stretched out just for better reading.

There are two other functions as well:
ceil() - This one always rounds up no matter how small the decimal
floor() - This one always rounds down no matter how small the decimal.

Regards
SW
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LVL 42

Expert Comment

by:Chris Stanyon
Comment Utility
If your variables contain the pound sign, then you'll need to strip that out. Also, if you need the output to include the decimals, you've got number_format().

$rrp = str_replace('£', '', $rows_product[$i]['product_rrp']);
$price = str_replace('£', '', $rows_product[$i]['product_rrp']);

$TheVar = round($rrp - $price);

echo number_format($TheVar,2);

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LVL 11

Expert Comment

by:SAMIR BHOGAYTA
Comment Utility
hi.. please use this

float round ( float $val [, int $precision = 0 [, int $mode = PHP_ROUND_HALF_UP ]] )

or

<?php
echo(round(0.60) . "<br>");
echo(round(0.50) . "<br>");
echo(round(0.49) . "<br>");
echo(round(-4.40) . "<br>");
echo(round(-4.60));
?>
0
 
LVL 108

Expert Comment

by:Ray Paseur
Comment Utility
Some good learning resources to help you get started with PHP...
http://www.experts-exchange.com/Web_Development/Web_Languages-Standards/PHP/A_11769-And-by-the-way-I-am-new-to-PHP.html

... And some things to avoid as you get started with PHP...
http://www.experts-exchange.com/Web_Development/Web_Languages-Standards/PHP/A_12293-AntiPHPatterns-and-AntiPHPractices.html

Best of luck with your project, ~Ray
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