PHP log10() - Math Functions
What is log10 Function?
Explanation
The "log10()" function is used to find base-10 logarithm.
Syntax:
log10(x)
In the above syntax "x" is the number for which to find the base-10 logarithm.
Example :
<?php
echo(log10(2) . "<br />");
echo(log10(-1));
?>
Result :
0.301029995664
NAN
In the above example, for negative number the function returns NAN.