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    ceil

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

    ceil — Round fractions up

    Description

    ceil(int|float $num): float

    Returns the next highest integer value by rounding up num if necessary.

    Parameters

    num

    The value to round

    Return Values

    num rounded up to the next highest integer. The return value of ceil() is still of type float as the value range of float is usually bigger than that of int.

    Changelog

    Version Description
    8.0.0 num no longer accepts internal objects which support numeric conversion.

    Examples

    Example #1 ceil() example

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

    See Also

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    User Contributed Notes 5 notes

    up
    87
    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

    ?>
    up
    49
    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!
    up
    24
    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
    ?>
    up
    14
    oktam
    13 years ago
    Actual behaviour:
    echo ceil(-0.1); //result "-0" but i expect "0"

    Workaround:
    echo ceil(-0.1)+0; //result "0"
    up
    8
    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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