INF

Infinite is a PHP constant, called INF. It is also possible to generate such a value, with calls to math functions such as log(0) or 1e308 * 2.

While the infinite is a float, it is possible to test a number with is_infinite().

<?php

$infinite = 1e308 * 2;

var_dump(is_infinite($infinite)); // true

var_dump(INF === $infinite);      // true

echo str_repeat('1', 1000) + 0;  // INF

?>

Documentation

See also is_infinite().

Related : Infinite, ArithmeticError Error, E, Infinite Loop, Non-numeric, Math