PHP: Check whether an integer is in a certain interval or not

Question

I am currently working on an achievement system for a small online game. The achievement entity basically has 4 attributes:

• id
• earnedBy
• earnedOn
• progress

The last one is supposed to be a percentage, meaning a number between 0 and 100. In order to make sure that no numbers greater than 100 or smaller than 0 are saved in the database, my setter-method looks as followed (I am using Symfony2 / Doctrine ORM):

public function setProgress($progress)
    {
        $this->progress = max(min($progress, 100), 0);

        return $this;
    }

The important line here is max(min($progress, 100), 0).

It works totally fine, I just wanted to ask, if there is another built-in function in PHP doing exactly that thing, and if what I am doing is okay (concerning good-developing style)

Answer 1

Since PHP 5.2 there are filter_var() functions with considerable set of options available.

One of them lets you check for number being in a range:

$param = 10;

$result = filter_var( $param, FILTER_VALIDATE_INT, [
    'options' => [
        'min_range' => 20, 
        'max_range' => 40
    ]
]);

var_dump( $result ); // will return FALSE for 10

http://codepad.viper-7.com/kVwx7L