<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>php不区分大小写</title> </head> <body> <?PHP class Hello{ pubLIC funcTION aa(){ echo "woco"; } } ?> <?php ECHO "hello php.."; $h = new HEllo(); $h->aA(); ?> </body> </html>