PHP is_finite() Function
Example
Check whether a value is finite or not:
<?php
echo is_finite(2) . "<br>";
echo is_finite(log(0)) . "<br>";
echo is_finite(2000);
?>
Run example »
Definition and Usage
The is_finite() function checks whether a value is finite or not.
This function returns true (1) if the specified value is a finite number, otherwise it returns false/nothing.
The value is finite if it is within the allowed range for a PHP float on this platform.
Syntax
is_finite(value);
| Parameter | Description |
|---|---|
| value | Required. Specifies the value to check |
Technical Details
| Return Value: | TRUE if value is a finite number, FALSE otherwise |
|---|---|
| Return Type: | Boolean |
| PHP Version: | 4.2+ |
PHP Math Reference
