(PHP 4, PHP 5, PHP 7, PHP 8)
ceil — Redondea al número superior
numEl valor a redondear
El valor num redondeado al entero superior.
El valor devuelto es un número de punto flotante
(float ), ya que el intervalo de valores de un float es generalmente
más amplio que el de un int .
| Versión | Descripción |
|---|---|
| 8.0.0 |
num ya no acepta objetos internos que soportan
las conversiones numéricas.
|
Ejemplo #1 Ejemplo con ceil()
<?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 look through a bunch of Google results-
<?php
// duplicates m$ excel's ceiling function
if( !function_exists('ceiling') )
{
function ceiling($number, $significance = 1)
{
return ( is_numeric($number) && is_numeric($significance) ) ? (ceil($number/$significance)*$significance) : false;
}
}
echo ceiling(0, 1000); // 0
echo ceiling(1, 1); // 1000
echo ceiling(1001, 1000); // 2000
echo ceiling(1.27, 0.05); // 1.30
?>Caution!
<?php
$value = 77.4;
echo ceil($value * 100) / 100; // 77.41 - WRONG!
echo ceil(round($value * 100)) / 100; // 77.4 - OK!Actual behaviour:
echo ceil(-0.1); //result "-0" but i expect "0"
Workaround:
echo ceil(-0.1)+0; //result "0"I couldn't find any functions to do what ceiling does while still leaving I specified number of decimal places, so I wrote a couple functions myself. round_up is like ceil but allows you to specify a number of decimal places. round_out does the same, but rounds away from zero.
<?php
// round_up:
// rounds up a float to a specified number of decimal places
// (basically acts like ceil() but allows for decimal places)
function round_up ($value, $places=0) {
if ($places < 0) { $places = 0; }
$mult = pow(10, $places);
return ceil($value * $mult) / $mult;
}
// round_out:
// rounds a float away from zero to a specified number of decimal places
function round_out ($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 56.78
echo round_up (-0.453001, 4); // displays -0.453
echo round_out (56.77001, 2); // displays 56.78
echo round_out (-0.453001, 4); // displays -0.4531
?>Please see http://www.php.net/manual/en/language.types.float.php for information regarding floating point precision issues.