Math Log1p In PHP
In this article I explain the PHP math log1p function.
PHP log1p() function
The PHP math log function is used to return the log(1+a) , where a is a number, computed in a way that is accurate even when the value of a is close to zero.
Syntax
Parameters in log10 function
It takes one parameter; it is:
| Parameter |
Description |
| number |
It specifies a number. |
Example of log1p function
<?php
$val1=log1p(2);
$val2=log1p(0);
$val3=log1p(1.232);
$val4=log1p(1);
echo "log1p value of <b>2</b> is <b>$val1</b> <br />";
echo "log1p value of <b>0</b> is <b>$val2</b> <br />";
echo "log1p value of <b>1.232</b> is <b>$val3</b> <br />";
echo "log1p value of <b>1</b> is <b>$val4</b> <br />";
?>
Note: The above code is used to convert numbers to the log(1+a). So in the above example the numbers "2", "0", "1.232" and "1" are converted to log(1+a).
Output
