php简略计数器

"; //2-------文本计数器 $file="../counter/count.dat"; if (!file_exists($file)) { $num_txt=1; }else { $num_txt=file_get_contents($file); $num_txt++; } $fp=fopen($file, "w"); fwrite($fp, $num_txt); fclose($fp); echo "You are the ".$num_txt." times visit."."
"; //3-------防刷新计数器 $file = "../counter/count.dat"; if (! file_exists ( $file )) { $fp = fopen ( $file, "w" ); fwrite ( $fp, "0" ); fclose ( $fp ); } $num_txt = file_get_contents ( $file ); session_get_cookie_params ( 24 * 3600 ); session_start (); if (! isset ( $_SESSION ["visited"] )) { $num_txt ++; $fp = fopen ( $file, "w" ); fwrite ( $fp, $num_txt ); fclose ( $fp ); $_SESSION ["visited"] = "true"; } echo "You are the " . $num_txt . " times visit." . "
"; //4--------图片计数器，同上，需要转杯0-9数字对应的图片 //5---------多用户计数器，存在数据库中 ?>