Text-based visitor sign-in book_PHP tutorial

By chance, I saw someone on the Internet using PHP+MYSQL to make a guest sign-in book. I thought it was very useful, so I wanted to make one myself. But using MYSQL felt a bit overkill, so I built a text-based visitor sign-in book. Its function is similar to what I saw on the Internet using MYSQL. I will publish its source code here, hoping that it will help netizens learn PHP. It is limited to my level, so there must be bugs in it, and I hope friends don’t forget to tell me if they find it. This sign-in book consists of two files: one is the sign.txt file that stores the sign-in information, which can be created by NOTEPAD; the second is the sign.php file that processes the information. There is a demo of it on Bamboo Garden's homepage , you are welcome to take a look.下面
就是sign.php的源代码：
sign.php
if(isset($name)&&isset($msg)){
   $name=ltrim($name);
   $t=date(y年m月d日);
   $dat="[".$t."]";
   $msg=ltrim($msg);
   $name=trim($name);
   $msg=trim($msg);
   $pristr=$name."  ".$dat." ".$msg."n";
   $f=fopen("sign.txt","a");
   fwrite($f,$pristr);
   fclose($f);
   }
   $file=file("sign.txt");
    if(!isset($pagenum)){
      $pagenum=1;
    }
    $lesssign=0;
    $num=count($file);
    $dispnumed=6*($pagenum-1);
    $dispnumbeg=$num-$dispnumed;
    $artnumeof1=6*$pagenum;
    $isdispnum=$num-$artnumeof1;
     if($isdispnum<=0){
      $dispnumeof=1;
      $lesssign=1;
    }
    else{
      $dispnumeof=$isdispnum+1;
    }
    $sign=0;
    $pagec=0;
     for($icount=0;($icount<$num)&&($sign==0);$icount+=6){
      for($i=0;$i<=6;$i++){
       if(($icount*6+$i)==$num){
           $sign=1;
         }
       }
       $pagec++;
     }
    $pagecount=$pagec;
    echo"

";
    $fuhao="◇  ";
    $color=e9eae9;
    $iscolor=0;
    $lessnum=5;
    echo"";
    for($i=$dispnumbeg;$i>=$dispnumeof;$i--){
       $linknum=$num-$i;
       $lessnum--;
       $stringmsg1=$file[($i-1)];
       $stringmsg2=strrev($stringmsg1);
       $stringmsg3=strstr($stringmsg2,"psbn");
       $stringmsg=strrev($stringmsg3);
       $stringlink=strstr($file[($i-1)],"http");
       $dispvar=$fuhao.$stringmsg;
       echo"";
       if($iscolor==0){
         $color=ffffff;
         $iscolor=1;
       }
       else{
         $color=e9eae9;
         $iscolor=0;
       }
    }
    if($lesssign==1){
         for($iless=$lessnum;$iless>0;$iless--){
       echo"";
          if($iscolor==0){
         $color=ffffff;
         $iscolor=1;
       }
       else{
         $color=e9eae9;
         $iscolor=0;
       }
       }
    }
    echo"";
    echo"";
    echo"";
    echo"";
    echo"";

    echo"

";
    echo"斑竹园签到簿";
    echo"

";
       echo$dispvar;
       echo "";
       echo"";
       echo$stringlink;
       echo"";
       echo"

";
       echo $fuhao."
n";
       echo"

";
    echo"称呼：";
    echo"";
    echo"地址：";
    echo"";
    echo"";
    echo"

";
   ?> 

http://www.bkjia.com/PHPjc/315547.htmlwww.bkjia.comtruehttp://www.bkjia.com/PHPjc/315547.htmlTechArticle一个很偶然的机会，在网上看到了有人用PHP+MYSQL作了一个访客签到簿， 当时觉得很有用处所以自己也很 想搞一个。但是用MYSQL觉得有点在材...