PHP is_infinite() Function

The PHP is_infinite() function is used to check if the argument is infinite or not. It returns true (1) if the argument is infinite (positive or negative), else returns false/nothing.

Syntax

is_infinite(x)

Parameters

`x`	`Required.` Specify the value.

Return Value

Returns true (1) if the argument is infinite, else returns false/nothing.

Example:

In the example below, is_infinite() function is used to check if the argument is infinite.

<?php
echo var_dump(is_infinite(10));
echo var_dump(is_infinite(-10));
echo var_dump(is_infinite(log(0)));

echo "\n"; 
echo var_dump(is_infinite(INF));
echo var_dump(is_infinite(-INF));
echo var_dump(is_infinite(NAN));
?>

The output of the above code will be:

bool(false)
bool(false)
bool(true)

bool(true)
bool(true)
bool(false)

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