PHP is_finite() Function

In this chapter you will learn:

1. Definition for PHP is_finite() Function
2. Syntax for PHP is_finite() Function
3. Parameter for PHP is_finite() Function
4. Return for PHP is_finite() Function
5. Example - Check whether a value is finite or not

Definition

The is_finite() function checks whether a value is finite or not.

Syntax

PHP is_finite() Function has the following syntax.

Parameter

Return

This function returns true (1) if the specified value is a finite number which is within the allowed range for a PHP float on this platform, otherwise it returns false/nothing.

Example

Check whether a value is finite or not:

<?php/*from jav a  2s . c om*/
echo is_finite(2) . "\n";
echo is_finite(log(0)) . "\n";
echo is_finite(2000);
?>

The code above generates the following result.

Next chapter...

What you will learn in the next chapter:

1. Definition for PHP is_infinite() Function
2. Syntax for PHP is_infinite() Function
3. Parameter for PHP is_infinite() Function
4. Return for PHP is_infinite() Function
5. Example - Check whether a value is infinite or not

PHP Predefined Math Constants

PHP abs() Function

PHP acos() Function

PHP acosh() Function

PHP asin() Function

PHP asinh() Function

PHP atan() Function

PHP atan2() Function

PHP atanh() Function

PHP base_convert() Function

PHP bindec() Function

PHP ceil() Function

PHP cos() Function

PHP cosh() Function

PHP decbin() Function

PHP dechex() Function

PHP decoct() Function

PHP deg2rad() Function

PHP exp() Function

PHP expm1() Function

PHP floor() Function

PHP fmod() Function

PHP getrandmax() Function

PHP hexdec() Function

PHP hypot() Function

PHP is_finite() Function

PHP is_infinite() Function

PHP is_nan() Function

PHP lcg_value() Function

PHP log() Function

PHP log10() Function

PHP log1p() Function

PHP max() Function

PHP min() Function

PHP mt_getrandmax() Function

PHP mt_rand() Function

PHP mt_srand() Function

PHP octdec() Function

PHP pi() Function

PHP pow() Function

PHP rad2deg() Function

PHP rand() Function

PHP round() Function

PHP sin() Function

PHP sinh() Function

PHP sqrt() Function

PHP srand() Function

PHP tan() Function

PHP tanh() Function