源代码:
<HTML> <HEAD></HEAD> <FONT FACE="'Courier New',Verdana, Arial, Helvetica" SIZE=2> <!DOCTYPE html> <html> <body> <FONT COLOR=#ff0000><?php $pets=array("a"=>"Cat","B"=>"Dog","c"=>"Horse","b"=>"Bird"); print_r(array_change_key_case($pets,CASE_UPPER)); ?></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>Array ( [A] => Cat [B] => Bird [C] => Horse ) </FONT> </body> </html> </HTML>