1.2.662. Manipulates INF

This code handles INF situations. INF represents the infinity, when used in a float context. It happens when a calculation returns a number that is much larger than the maximum allowed float (not integer), or a number that is not a Division by 0.

<?php

// pow returns INF, as it is equivalent to 1 / 0 ^ 2
$a = pow(0,-2); //

// exp returns an actual value, but won't be able to represent it as a float
$a = exp(PHP_INT_MAX);

// 0 ^ -1 is like 1 / 0 but returns INF.
$a = pow(0, -1);

var_dump(is_infinite($a));

// This yields a Division by zero exception
$a = 1 / 0;

?>

See also Math predefined constants.

1.2.662.1. Specs

Short name	Php/IsINF
Rulesets	All, Appinfo, CE, Changed Behavior
Exakat since	0.10.6
PHP Version	All
Severity	Minor
Time To Fix	Quick (30 mins)
Precision	High
Features	class, interface
Available in	Entreprise Edition, Community Edition, Exakat Cloud