intdiv

    (PHP 7, PHP 8)

    intdiv — Integer division

    Descrizione

    intdiv(int $num1, int $num2): int

    Returns the integer quotient of the division of num1 by num2.

    Elenco dei parametri

    num1

    Number to be divided.

    num2

    Number which divides the num1.

    Valori restituiti

    The integer quotient of the division of num1 by num2.

    Errori/Eccezioni

    If num2 is 0, a DivisionByZeroError exception is thrown. If the num1 is PHP_INT_MIN and the num2 is -1, then an ArithmeticError exception is thrown.

    Esempi

    Example #1 intdiv() example

    <?php
    var_dump    (intdiv(3, 2));
    var_dump(intdiv(-3, 2));
    var_dump(intdiv(3, -2));
    var_dump(intdiv(-3, -2));
    var_dump(intdiv(PHP_INT_MAX, PHP_INT_MAX));
    var_dump(intdiv(PHP_INT_MIN, PHP_INT_MIN));
    var_dump(intdiv(PHP_INT_MIN, -1));
    var_dump(intdiv(1, 0));
    ?>
    int(1)
int(-1)
int(-1)
int(1)
int(1)
int(1)

Fatal error: Uncaught ArithmeticError: Division of PHP_INT_MIN by -1 is not an integer in %s on line 8
Fatal error: Uncaught DivisionByZeroError: Division by zero in %s on line 9

    Vedere anche:

    • / - Floating-point division
    • % - Integer modulus
    • fmod() - Returns the floating point remainder (modulo) of the division of the arguments - Floating-point modulo

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    User Contributed Notes 2 notes

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    42
    AmeenRoss
    10 years ago
    This does indeed seem to be equal to intdiv:<?phpfunction intdiv_1($a, $b){    return ($a - $a % $b) / $b;}?>However, this isn't:<?phpfunction intdiv_2($a, $b){    return floor($a / $b);}?>Consider an example where either of the parameters is negative:<?php$param1 = -10;$param2 = 3;print_r([    'modulus' => intdiv_1($param1, $param2),    'floor' => intdiv_2($param1, $param2),]);/** * Array * ( *     [modulus] => -3 *     [floor] => -4 * ) */?>
    up
    5
    oittaa
    3 years ago
    Python style integer division, where the result is always rounded towards minus infinity.1 // 2 is 0(-1) // 2 is -11 // (-2) is -1(-1) // (-2) is 0<?phpfunction intdiv_py(int $num1, int $num2): int{    if ($num1 < 0 xor $num2 < 0){        $num1 = abs($num1);        $num2 = abs($num2);        $remainder = $num1 % $num2;        return $remainder ? -1 -($num1 - $remainder) / $num2 : -$num1 / $num2;    }    return intdiv($num1, $num2);}var_dump(intdiv_py(1, 2)); // 0var_dump(intdiv_py(-1, 2)); // -1var_dump(intdiv_py(1, -2)); // -1var_dump(intdiv_py(-1, -2)); // 0?>
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