PHP | intval() Function

22 June 2025

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The intval() function is an inbuilt function in PHP which returns the integer value of a variable.

Syntax:

int intval ( $var, $base )

Parameters: This function accepts two parameters out of which one is mandatory while the other one is optional. Parameters are described below:

$var: It is a mandatory parameter serves as the variable which needs to be converted to its integer value.
$base: It ia a optional parameter specifies the base for conversion of $var to its corresponding integer. If $base is not specified.
- If $var contains 0x (or 0X) as prefix, the base is taken as 16.
- If $var starts with 0, the base is taken as 8
- Otherwise, the base is taken as 10.

Return Value: It returns the corresponding integer value of $var.

Examples:

Input : $var = '120', $base = 8
Output : 80

Input : $var = 0x34
Output : 52

Input : $var = 034
Output : 28

Below programs illustrate the use of intval() function in PHP:

Program 1:

<?php 
$var = '7.423'; 
$int_value = intval($var); 
echo $int_value; 
?> 

Output:

Program 2:

<?php 
$var = 0x423; 
$int_value = intval($var); 
echo $int_value; 
?> 

Output:

Program 3:

<?php 
$var = "64"; 
echo intval($var)."\n".intval($var, 8); 
  
?> 

Output:

64
52

Reference: http://php.net/manual/en/function.intval.php