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Variable handling Functions
PHP Manual

# intval

(PHP 4, PHP 5)

intval — Get the integer value of a variable

### Description

int intval ( mixed `$var` [, int `$base` = 10 ] )

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.

### Parameters

`var`

  The scalar value being converted to an integer

`base`

  The base for the conversion

  > Note:

  > If `base` is 0, the base used is determined by the format of `var`:

  > - if string includes a "0x" (or "0X") prefix, the base is taken as 16 (hex); otherwise,
  > - if string starts with "0", the base is taken as 8 (octal); otherwise,
  > - the base is taken as 10 (decimal).

### Return Values

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.

### Examples

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
echo intval(array()); // 0
echo intval(array('foo', 'bar')); // 1
?>`

### Notes

> Note:

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

### Changelog

Version | Description
--- | ---
5.1.0 | Throws `E_NOTICE` and returns 1, when an object is passed to `var`.

### See Also

- boolval() - Get the boolean value of a variable
- floatval() - Get float value of a variable
- strval() - Get string value of a variable
- settype() - Set the type of a variable
- is_numeric() - Finds whether a variable is a number or a numeric string
- Type juggling
- BCMath Arbitrary Precision Mathematics Functions

import_request_variables
is_array
Variable handling Functions
PHP Manual