PHP: is_finite() function

Description

The is_finite() function is used to find whether a value is finite or not.

Version:

(PHP 4 and above)

Syntax:

is_finite (num)

Parameter:

Return value:

TRUE if num is finite number otherwise FALSE.

Value Type: Boolean.

Pictorial representation of is_finite() function

Example of php is_finite() function

<?php
$fval1=10.21;
$fval2=-50.85;
$zisf1=is_finite($fval1);
$zisf2=is_finite($fval2);
$zisf3=is_finite($fval3);
echo "$fval1 is is_finite : $zisf1<br />";
echo "$fval2 is is_finite : $zisf2<br />";
echo "$fval3 is is_finite : $zisf3<br />";
?> 

Output:

10.21 is is_finite : 1
-50.85 is is_finite : 1
-INF is is_finite :

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See also

PHP Function Reference

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