is_finite(): to find out legal finite number or not
Check whether a float is finite
is_finite() returns true when a floating-point value is neither infinite nor NAN.
$value = 25.5;
var_dump(is_finite($value)); // bool(true)
A finite float is neither NAN nor positive/negative infinity.
var_dump(is_finite(2.0)); // bool(true)
var_dump(is_finite(0.5)); // bool(true)
var_dump(is_finite(log(0))); // bool(false): -INF
var_dump(is_finite(sqrt(-1))); // bool(false): NAN
bool is_finite(float $num)| Parameter | DESCRIPTION |
|---|---|
$input | Required : Number to check. |
Returns true when $num is finite; otherwise returns false.
Math Functions is_infinite(): Finds whether a value is infinite or not is_infinite(): check infinity is_nan(): check NAN
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