源代码:
<HTML> <HEAD></HEAD> <FONT FACE="'Courier New',Verdana, Arial, Helvetica" SIZE=2> <!DOCTYPE html> <html> <body> <FONT COLOR=#ff0000><?php echo(cos(3) . " "); echo(cos(-3) . " "); echo(cos(0) . " "); echo(cos(M_PI) . " "); echo(cos(2*M_PI)); ?></FONT> </body> </html> </HTML>
运行结果：
<HTML> <HEAD></HEAD> <FONT FACE="'Courier New',Verdana, Arial, Helvetica" SIZE=2> <!DOCTYPE html> <html> <body> <FONT COLOR=#ff0000>-0.98999249660045 -0.98999249660045 1 -1 1</FONT> </body> </html> </HTML>