(PHP 4 >= 4.2.0, PHP 5, PHP 7)
is_infinite — Finds whether a value is infinite
is_infinite ( float $val ) : bool
Returns true if val is infinite (positive or negative), like the result of log(0) or any value too big to fit into a float on this platform.
val
The value to check
true if val is infinite, else false.
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https://www.php.net/manual/en/function.is-infinite.php