International PHP Conference Berlin 2025

intdiv

(PHP 7, PHP 8)

intdivDivision d'Entier

Description

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

Retourne le quotient entier de la division de num1 par num2.

Liste de paramètres

num1

Nombre à diviser.

num2

Nombre qui divise num1.

Valeurs de retour

Le quotient entier de la division de num1 par num2.

Erreurs / Exceptions

Si num2 est 0, une exception DivisionByZeroError sera émise. Si num1 est PHP_INT_MIN et que num2 est -1, dans ce cas là une exception ArithmeticError est émise.

Exemples

Exemple #1 Exemple de intdiv()

<?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

Voir aussi

  • / - Division de nombre flotant
  • % - Modulo entier
  • fmod() - Retourne le reste de la division - Modulo de nombre flotant

add a note

User Contributed Notes 3 notes

up
43
AmeenRoss
9 years ago
This does indeed seem to be equal to intdiv:

<?php
function intdiv_1($a, $b){
return (
$a - $a % $b) / $b;
}
?>

However, this isn't:

<?php
function 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
6
oittaa
2 years ago
Python style integer division, where the result is always rounded towards minus infinity.

1 // 2 is 0
(-1) // 2 is -1
1 // (-2) is -1
(-1) // (-2) is 0

<?php
function 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)); // 0
var_dump(intdiv_py(-1, 2)); // -1
var_dump(intdiv_py(1, -2)); // -1
var_dump(intdiv_py(-1, -2)); // 0
?>
up
-2
sree dot millu at gmail dot com
5 years ago
@AmeenRoss
This does NOT seem to be equal to intdiv:

<?php
function intdiv_1($a, $b){
return (
$a - $a % $b) / $b;
}
?>

See this example code
<?php

$x
= 5.6;
$y = 1.4 ;

echo
intdiv($x,$y);

echo
"\n";

function
intdiv_1($a, $b){
return (
$a - $a % $b) / $b;
}

echo
intdiv_1($x,$y);
?>

//Output
5
4
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