Show a number to two decimal places
PhpFormattingNumbersRoundingNumber FormattingPhp Problem Overview
What's the correct way to round a PHP string to two decimal places?
$number = "520"; // It's a string from a database
$formatted_number = round_to_2dp($number);
echo $formatted_number;
The output should be 520.00
;
How should the round_to_2dp()
function definition be?
Php Solutions
Solution 1 - Php
You can use number_format():
return number_format((float)$number, 2, '.', '');
Example:
$foo = "105";
echo number_format((float)$foo, 2, '.', ''); // Outputs -> 105.00
This function returns a string.
Solution 2 - Php
Use round()
(use if you are expecting a number in float format only, else use number_format() as an answer given by Codemwnci):
echo round(520.34345, 2); // 520.34
echo round(520.3, 2); // 520.3
echo round(520, 2); // 520
From the manual:
> ### Description: float round(float $val [, int $precision = 0 [, int $mode = PHP_ROUND_HALF_UP ]]);
> Returns the rounded value of val
to specified precision
(number of digits after the decimal point). precision
can also be negative or zero (default).
...
> ### Example #1 round()
examples
>
> ###Example #2 mode examples > echo round(8.5, 0, PHP_ROUND_HALF_UP); // 9 echo round(8.5, 0, PHP_ROUND_HALF_DOWN); // 8 echo round(8.5, 0, PHP_ROUND_HALF_EVEN); // 8 echo round(8.5, 0, PHP_ROUND_HALF_ODD); // 9 ?>
Solution 3 - Php
Alternatively,
$padded = sprintf('%0.2f', $unpadded); // 520 -> 520.00
Solution 4 - Php
http://php.net/manual/en/function.round.php
e.g.
echo round(5.045, 2); // 5.05
echo round(5.055, 2); // 5.06
Solution 5 - Php
Try:
$number = 1234545454;
echo $english_format_number = number_format($number, 2);
The output will be:
1,234,545,454.00
Solution 6 - Php
Use the PHP number_format() function.
For example,
$num = 7234545423;
echo number_format($num, 2);
The output will be:
7,234,545,423.00
Solution 7 - Php
You can use the PHP printf
or sprintf
functions:
Example with sprintf
:
$num = 2.12;
echo sprintf("%.3f", $num);
You can run the same without echo
as well. Example: sprintf("%.3f", $num);
Output:
2.120
Alternatively, with printf
:
echo printf("%.2f", $num);
Output:
2.124
Solution 8 - Php
Another more exotic way to solve this issue is to use bcadd()
with a dummy value for the $right_operand of 0
.
$formatted_number = bcadd($number, 0, 2);
Solution 9 - Php
bcdiv($number, 1, 2) // 2 varies for digits after the decimal point
This will display exactly two digits after the decimal point.
Advantage:
If you want to display two digits after a float value only and not for int, then use this.
Solution 10 - Php
$retailPrice = 5.989;
echo number_format(floor($retailPrice*100)/100,2, '.', '');
It will return 5.98 without rounding the number.
Solution 11 - Php
Use the PHP number_format() function.
Solution 12 - Php
Here I get two decimals after the .
(dot) using a function...
function truncate_number($number, $precision = 2) {
// Zero causes issues, and no need to truncate
if (0 == (int)$number) {
return $number;
}
// Are we negative?
$negative = $number / abs($number);
// Cast the number to a positive to solve rounding
$number = abs($number);
// Calculate precision number for dividing / multiplying
$precision = pow(10, $precision);
// Run the math, re-applying the negative value to ensure
// returns correctly negative / positive
return floor( $number * $precision ) / $precision * $negative;
}
Results from the above function:
echo truncate_number(2.56789, 1); // 2.5
echo truncate_number(2.56789); // 2.56
echo truncate_number(2.56789, 3); // 2.567
echo truncate_number(-2.56789, 1); // -2.5
echo truncate_number(-2.56789); // -2.56
echo truncate_number(-2.56789, 3); // -2.567
New Correct Answer
Use the PHP native function bcdiv
echo bcdiv(2.56789, 1, 1); // 2.5
echo bcdiv(2.56789, 1, 2); // 2.56
echo bcdiv(2.56789, 1, 3); // 2.567
echo bcdiv(-2.56789, 1, 1); // -2.5
echo bcdiv(-2.56789, 1, 2); // -2.56
echo bcdiv(-2.56789, 1, 3); // -2.567
Solution 13 - Php
For conditional rounding off ie. show decimal where it's really needed otherwise whole number
123.56 => 12.56
123.00 => 123
$somenumber = 123.56;
$somenumber = round($somenumber,2);
if($somenumber == intval($somenumber))
{
$somenumber = intval($somenumber);
}
echo $somenumber; // 123.56
$somenumber = 123.00;
$somenumber = round($somenumber,2);
if($somenumber == intval($somenumber))
{
$somenumber = intval($somenumber);
}
echo $somenumber; // 123
Solution 14 - Php
I make my own.
$decimals = 2;
$number = 221.12345;
$number = $number * pow(10, $decimals);
$number = intval($number);
$number = $number / pow(10, $decimals);
Solution 15 - Php
round_to_2dp
is a user-defined function, and nothing can be done unless you posted the declaration of that function.
However, my guess is doing this: number_format($number, 2);
Solution 16 - Php
$twoDecNum = sprintf('%0.2f', round($number, 2));
The rounding correctly rounds the number and the sprintf forces it to 2 decimal places if it happens to to be only 1 decimal place after rounding.
Solution 17 - Php
use roud(yourValue,decimalPoint)
or number_format(yourValue,decimalPoint);
number_format()
return value as string like this type 1,234.67. so in this case you can not use it for addition or any calculation. if you try then you have to deal with Number Format Error...
In this case round(121222.299000000,2)
will be better option.
The result would be 121222.29 ...
Solution 18 - Php
If you want to use two decimal digits in your entire project, you can define:
bcscale(2);
Then the following function will produce your desired result:
$myvalue = 10.165445;
echo bcadd(0, $myvalue);
// result=10.11
But if you don't use the bcscale function, you need to write the code as follows to get your desired result.
$myvalue = 10.165445;
echo bcadd(0, $myvalue, 2);
// result=10.11
To know more
Solution 19 - Php
$number = sprintf('%0.2f', $numbers); // 520.89898989 -> 520.89
This will give you 2 number after decimal.
Solution 20 - Php
Adding to other answers, since number_format() will, by default, add thousands separator.
To remove this, do this:
$number = number_format($number, 2, ".", "");
Solution 21 - Php
Number without round
$double = '21.188624';
echo intval($double) . '.' . substr(end(explode('.', $double)), 0, 2);
Solution 22 - Php
Here's another solution with strtok and str_pad:
$num = 520.00
strtok(round($num, 2), '.') . '.' . str_pad(strtok('.'), 2, '0')
Solution 23 - Php
- Choose the number of decimals
- Format commas(,)
- An option to trim trailing zeros
> Once and for all!
function format_number($number,$dec=0,$trim=false){
if($trim){
$parts = explode(".",(round($number,$dec) * 1));
$dec = isset($parts[1]) ? strlen($parts[1]) : 0;
}
$formatted = number_format($number,$dec);
return $formatted;
}
Examples
echo format_number(1234.5,2,true); //returns 1,234.5
echo format_number(1234.5,2); //returns 1,234.50
echo format_number(1234.5); //returns 1,235
Solution 24 - Php
In case you use math equation
like I did you can set it like this:
{math equation="x + y" x=4.4444 y=5.0000 format="%.2f"}
Solution 25 - Php
That's the same question I came across today and want to round a number and return float value up to a given decimal place and it must not be string (as returned from number_format) the answer is
echo sprintf('%.' . $decimalPlaces . 'f', round($number, $decimalPlaces));