源代码:
<HTML> <HEAD></HEAD> <FONT FACE="'Courier New',Verdana, Arial, Helvetica" SIZE=2> <!DOCTYPE html> <html> <body> <FONT COLOR=#ff0000><?php echo(atan2(0.50,0.50) . " "); echo(atan2(-0.50,-0.50) . " "); echo(atan2(5,5) . " "); echo(atan2(10,20) . " "); echo(atan2(-5,-5) . " "); echo(atan2(-10,10)); ?></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>0.78539816339745 -2.3561944901923 0.78539816339745 0.46364760900081 -2.3561944901923 -0.78539816339745</FONT> </body> </html> </HTML>