Filter and Validate Integer Constant in PHP

The FILTER_VALIDATE_INT constant validates value as integer.

Options and flags

• min_range − The minimum integer value

• max_range − The maximum integer value

• FILTER_FLAG_ALLOW_OCTAL − Allows octal number values

• FILTER_FLAG_ALLOW_HEX − Allows hexadecimal number values

Return

The FILTER_VALIDATE_INT constant does not return anything.

Example

 Live Demo

<?php
$int = 110;
$var = 3.5;
var_dump(filter_var($var, FILTER_VALIDATE_FLOAT));
if (filter_var($int, FILTER_VALIDATE_INT)) {
   echo("Integer Variable");
} else {
   echo("Not an Integer Variable");
}
?>

Output

The following is the output.

float(3.5)
Integer Variable

Let us see another example.

Example

 Live Demo

<?php
$int = 5;
$min = 1;
$max = 20;
if (filter_var($int, FILTER_VALIDATE_INT, array("options" => array("min_range"=>$min, "max_range"=>$max))) === false) {
   echo("Range not accepted!");
} else {
   echo("Accepted range!");
}
?>

Output

Here is the output.

Accepted range!