PHP Tutorial - PHP intval() function

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

Syntax

PHP intval() function has the following syntax.

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

Parameter

var - The scalar value being converted to an integer
base - The base for the conversion

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

The integer value of var on success, or 0 on failure.

Example

Find out the int value


<?php/*from w w w  .  j av  a 2s  .  c om*/
echo intval(2) . "\n";                       // 2
echo intval(4.1) . "\n";                     // 4
echo intval('4') . "\n";                     // 4
echo intval('+42') . "\n";                   // 42
echo intval('-42') . "\n";                   // -42
echo intval(042) . "\n";                     // 34
echo intval('04') . "\n";                    // 4
echo intval(1e10) . "\n";                    // 1410065408
echo intval('1e10') . "\n";                  // 1
echo intval(0x1A) . "\n";                    // 26
echo intval(42, 8) . "\n";                   // 42
echo intval('42', 8) . "\n";                 // 34
echo intval(array()) . "\n";                 // 0
echo intval(array('foo', 'bar')) . "\n";     // 1
?>

The code above generates the following result.