Rounding up to the second decimal place

Question

Possible Duplicate:
PHP Round function - round up to 2 dp?

What my problem is:

When i use

ceil(3.6451895227869);

i get like

4

but i want

3.65

Can you help me out?

UPDATE

Please remember: This should always round to ceil like while rounding

3.6333333333333

it must not be 3.63 but should be 3.64

Solution 1

Check out http://www.php.net/manual/en/function.round.php

<?php

echo round(3.6451895227869, 2);

?>

EDIT Try using this custom function http://www.php.net/manual/en/function.round.php#102641

<?php 
function round_up ( $value, $precision ) { 
    $pow = pow ( 10, $precision ); 
    return ( ceil ( $pow * $value ) + ceil ( $pow * $value - ceil ( $pow * $value ) ) ) / $pow; 
} 

echo round_up(3.63333333333, 2);  // 3.64

?>

Solution 2

You want round

round(3.6451895227869, 2, PHP_ROUND_HALF_UP);

The second argument is the precision, the flag tells round to always round up (like ceil)

Comments

[Pekka]

That's not what ceil does: "Returns the next highest integer value by rounding up value if necessary.". You'll need a different method

[Gordon]

please point out why none of stackoverflow.com/search?q=round+to+precision+php did help solve your problem

[Aad Mathijssen]

This is a duplicate of the following post about rounding numbers up to a number of decimal positions: stackoverflow.com/questions/2074527/php-rounding-numbers

[LIGHT]

No, but i want it ceil. This gonna round it off.. ok, lets see for example: i want to ceil this number: 3.63333333333 to 3.64

[Adam Hopkinson]

You don't need a custom function - you can use the flag PHP_ROUND_HALF_UP, as per my answer

[tomexx]

It won't work as desired. Try number 3.6333333333333...

[Fabio Nolasco]

The PHP round + PHP_ROUND_HALF_UP will only round up if the last digit is 5 or more. Example: 3.444 will become 3.44. So the function sent by tomexx is actually really cool and works perfectly. I just tested it here.

[Fabio Nolasco]

The PHP round + PHP_ROUND_HALF_UP will only round up if the last digit is 5 or more. Example: 3.444 becomes 3.44. 3.445 becomes 3.45 Source: php.net/manual/en/function.round.php So the function sent by tomexx is actually really cool and works perfectly. I just tested it here. <?php function round_up ( $value, $precision ) { $pow = pow ( 10, $precision ); return ( ceil ( $pow * $value ) + ceil ( $pow * $value - ceil ( $pow * $value ) ) ) / $pow; } echo round_up(3.63333333333, 2); // 3.64 ?>

[Jan.J]

This function is not really the best. It could be much simpler. Like in this stackoverflow.com/questions/2074527/php-rounding-numbers/…

[userlond]

@tomexx, on php 5.3 your function could produce wrong results. See sandbox here

[Nico Westerdale]

Do not do multiplication inside a ceil function! You'll get floating point errors and it can be extremely unpredictable! Try round_up(2.22, 2) and you'll see it gives an answer of 2.23 due to floating point errors, whereas round_up(2.21, 2) correctly gives 2.21. To avoid this do: function ceiling($value, $precision = 0) { $offset = 0.5; if ($precision !== 0) $offset /= pow(10, $precision); return round($value + $offset, $precision, PHP_ROUND_HALF_DOWN); }

[jave.web]

In PHP 5.6 onwards, you may prefer to use the ** operator. (instead of pow())

[helvete]

Just a note: This solution no longer answers the question since it has been edited.

[Mojo]

See this answer stackoverflow.com/a/48456940/1245149

[Mariuta Mihai Dan]

Tomexx, may the Holy Grand Sacrificied Mina bless you and your family for this wise answer!