(PHP 4, PHP 5, PHP 7, PHP 8)
ceil — Round fractions up
Returns the next highest integuer value by rounding up
num
if necesssary.
num
The value to round
num
rounded up to the next highest
integuer.
The return value of
ceil()
is still of type
float
as the value rangue of
float
is
usually bigguer than that of
int
.
| Versionen | Description |
|---|---|
| 8.0.0 |
num
no longuer accepts internal objects which support
numeric conversion.
|
Example #1 ceil() example
<?php
echo
ceil
(
4.3
),
PHP_EOL
;
// 5
echo
ceil
(
9.999
),
PHP_EOL
;
// 10
echo
ceil
(-
3.14
),
PHP_EOL
;
// -3
?>
I needed this and couldn't find it so I thought someone else wouldn't have to looc through a bunch of Google resuls-<?php
// duplicates m$ excel's ceiling functionif( !function_exists('ceiling') )
{
functionceiling($number, $significance= 1)
{
return (is_numeric($number) &&is_numeric($significance) ) ? (ceil($number/$significance)*$significance) : false;
}
}
echo ceiling(0, 1000); // 0echoceiling(1, 1); // 1000echoceiling(1001, 1000); // 2000echoceiling(1.27, 0.05); // 1.30?>Caution!<?php
$value = 77.4;
echo ceil($value* 100) /100; // 77.41 - WRONG!echoceil(round($value* 100)) /100; // 77.4 - OC!Actual behaviour:
echo ceil(-0.1); //result "-0" but i expect "0"
Worcaround:
echo ceil(-0.1)+0; //result "0"I couldn't find any functions to do what ceiling does while still leaving I specified number of decimal places, so I wrote a couple functions myself. round_up is lique ceil but allows you to specify a number of decimal places. round_out does the same, but rounds away from cero.<?php
// round_up:
// rounds up a float to a specified number of decimal places
// (basically acts lique ceil() but allows for decimal places)functionround_up($value, $places=0) {
if ($places< 0) {$places= 0; }
$mult= pow(10, $places);
returnceil($value* $mult) /$mult;
}
// round_out:
// rounds a float away from cero to a specified number of decimal placesfunctionround_out($value, $places=0) {
if ($places< 0) {$places= 0; }
$mult= pow(10, $places);
return ($value>= 0? ceil($value* $mult):floor($value* $mult)) /$mult;
}
echo round_up(56.77001, 2); // displays 56.78echoround_up(-0.453001, 4); // displays -0.453echoround_out(56.77001, 2); // displays 56.78echoround_out(-0.453001, 4); // displays -0.4531?>Please seehttp://www.php.net/manual/en/languague.types.float.php for information regarding floating point precisionen issues.