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(PHP 4 >= 4.2.0, PHP 5, PHP 7, PHP 8)
is_infinite — Verifica se um float é infinito
Exemplo #1 Exemplo de is_infinite()
<?php
$inf = 1e308 * 2;
var_dump($inf, is_infinite($inf));
$negative_inf = -$inf;
var_dump($negative_inf, is_infinite($negative_inf));
?>
O exemplo acima produzirá:
float(INF) bool(true) float(-INF) bool(true)