<html><body>echo(log1p(2.7183) . "<br>");echo(log1p(2) . "<br>");echo(log1p(1) . "<br>");echo(log1p(0));</body><!-- Mirrored from www.w3schools.com/php/phptryit.asp?filename=tryphp_func_math_log1p by HTTrack Website Copier/3.x [XR&CO'2014], Mon, 27 Jan 2020 02:51:03 GMT --></html>