刚刚写的计数器程序，下午刚学会输出hello world，晚上就写出计数器了，进步是不是很快？ PHP: <!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>计数器</title> </head> <body> <?php $datafile = "data.txt"; function counter($datafile) { $fp = fopen($datafile,"rw"); $num = fgets($fp,5); $num += 1; print "您是第 "."$num"." 位访客"; } counter($datafile); ?> </body> </html>