ceil

(PHP 4, PHP 5, PHP 7, PHP 8)

ceil — Redondear fracciones hacia arriba

Descripción

ceil(float $value): float

Devuelve el siguiente valor entero mayor redondeando hacia arriba value si fuera necesario.

Parámetros

value: El valor a redondear

Valores devueltos

value redondeado al siguiente entero más alto. El valor de retorno de ceil() sigue siendo de tipo float ya que el rango de valores de float es usualmente mayor que el del tipo integer.

Ejemplos

Ejemplo #1 Ejemplo de ceil()

<?php
echo ceil(4.3);    // 5
echo ceil(9.999);  // 10
echo ceil(-3.14);  // -3
?>

Ver también

floor() - Redondear fracciones hacia abajo
round() - Redondea un float

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User Contributed Notes 5 notes

down

Scott Weaver / scottmweaver * gmail ¶

16 years ago

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

?>

down

eep2004 at ukr dot net ¶

6 years ago

Caution!
<?php
$value = 77.4;
echo ceil($value * 100) / 100;         // 77.41 - WRONG!
echo ceil(round($value * 100)) / 100;  // 77.4 - OK!

down

steve_phpnet // nanovox \\ com ¶

19 years ago

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
?>

down

oktam ¶

13 years ago

Actual behaviour:
echo ceil(-0.1); //result "-0" but i expect "0"

Workaround:
echo ceil(-0.1)+0; //result "0"

down

frozenfire at php dot net ¶

12 years ago

Please see http://www.php.net/manual/en/language.types.float.php for information regarding floating point precision issues.

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