import_request_variables
is_array
Variable handling Funkcje
PHP Manual

# intval

(PHP 4, PHP 5)

intval — Get the integer value of a variable

### Opis

int intval ( mixed `$var` [, int `$base` ] )

Returns the integer value of `var` , using the specified `base` for the conversion (the default is base 10).

### Parametry

`var`

  The scalar value being converted to an integer

`base`

  The base for the conversion (default is base 10)

### Zwracane wartości

The integer value of `var` on success, or 0 on failure. Empty arrays and objects return 0, non-empty arrays and objects return 1.

The maximum value depends on the system. 32 bit systems have a maximum signed integer range of -2147483648 to 2147483647. So for example on such a system, intval('1000000000000') will return 2147483647. The maximum signed integer value for 64 bit systems is 9223372036854775807.

Strings will most likely return 0 although this depends on the leftmost characters of the string. The common rules of integer casting apply.

### Przykłady

Example #1 intval() examples

The following examples are based on a 32 bit system.

`<?php
echo intval(42); // 42
echo intval(4.2); // 4
echo intval('42'); // 42
echo intval('+42'); // 42
echo intval('-42'); // -42
echo intval(042); // 34
echo intval('042'); // 42
echo intval(1e10); // 1410065408
echo intval('1e10'); // 1
echo intval(0x1A); // 26
echo intval(42000000); // 42000000
echo intval(420000000000000000000); // 0
echo intval('420000000000000000000'); // 2147483647
echo intval(42, 8); // 42
echo intval('42', 8); // 34
?>`

### Notatki

> Informacja: The `base` parameter has no effect unless the `var` parameter is a string.

### Patrz także

- floatval()
- strval()
- settype()
- is_numeric()
- Type juggling
- BCMath Arbitrary Precision Mathematics Functions

import_request_variables
is_array
Variable handling Funkcje
PHP Manual