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PHP is_finite () function

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Examples

Determine whether a value is finite:

<?php
echo is_finite(2) . "<br>";
echo is_finite(log(0)) . "<br>";
echo is_finite(2000);
?>

Running instance »

Definition and Usage

is_finite () function to determine whether a value is finite.

If the specified value is a finite value, the function returns true (1). Otherwise, it returns false / nothing.

If the value is on the native platform PHP floating point numbers are within the allowable range, the value is limited value.


grammar

is_finite( value );

参数 描述
value 必需。规定要检查的值。

technical details

return value: If the value is a finite value, returns TRUE. Otherwise, it returns FALSE.
Return type: Boolean
PHP version: 4.2+


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