源代码:
<HTML> <HEAD></HEAD> <FONT FACE="'Courier New',Verdana, Arial, Helvetica" SIZE=2> <!DOCTYPE html> <html> <body> <FONT COLOR=#ff0000><?php echo(sin(3) . " "); echo(sin(-3) . " "); echo(sin(0) . " "); echo(sin(M_PI) . " "); echo(sin(M_PI_2)); ?></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>0.14112000805987 -0.14112000805987 0 1.2246467991474E-16 1</FONT> </body> </html> </HTML>