源代码:
<HTML> <HEAD></HEAD> <FONT FACE="'Courier New',Verdana, Arial, Helvetica" SIZE=2> <!DOCTYPE html> <html> <body> <FONT COLOR=#ff0000><?php var_dump(checkdate(12,31,-400)); echo " "; var_dump(checkdate(2,29,2003)); echo " "; var_dump(checkdate(2,29,2004)); ?></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>bool(false) bool(false) bool(true) </FONT> </body> </html> </HTML>