tryphp_func_math_log10.php:
<!DOCTYPE html> <html> <body> <?php echo(log10(2.7183) . "<br>"); echo(log10(2) . "<br>"); echo(log10(1) . "<br>"); echo(log10(0)); ?> </body> </html>
0.43429738512451
0.30102999566398
0
-INF