(PHP 4, PHP 5)
intval — Get the integer value of a variable
Returns the integer value of var,
using the specified base for the conversion
(the default is base 10). intval() should not be used
on objects, as doing so will emit an E_NOTICE level
error and return 1.
var
The scalar value being converted to an integer
base
The base for the conversion
The integer value of var on success, or 0 on
failure. Empty arrays return 0, non-empty arrays 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.
Przykład #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
echo intval(array()); // 0
echo intval(array('foo', 'bar')); // 1
?>
Informacja:
The
baseparameter has no effect unless thevarparameter is a string.
| Wersja | Opis |
|---|---|
| 5.1.0 |
Throws E_NOTICE and
returns 1, when an object is passed to
var.
|