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 http://www.cnblogs.com/wuniaoheart/ 

 

数据库中，存放文章的表中有“Tag”字段，用来存放标签。标签之间用“,”分隔。比如“PHP,VB,随笔”。 

下面的实现代码，将标签从数据库中搜出来，并格式化处理，使其以出现的次数为依据显示出不同大小的文字连接。 

其中的细节，不做解释了！ 

观念陈、方法笨、效率低的标签云的实现代码如下：

 

1 
     
";22      $Tags = explode(",",$TagString);23      $n = 1;24      $i = 0;25      $Continue = TRUE;26      //echo $Tags[1]."
";27      //in case no-label's article28      while($Tags[$n] OR $Tags[++$n] OR $Tags[++$n] ){29      $EachTag = $Tags[$n++];30      //echo $EachTag."
";31      $Continue = TRUE;32      for($i=0;$Continue;$i++){33          if( $EachTagStr[$i][0] ) {34              if( $EachTagStr[$i][0] == $EachTag ){35                  $EachTagStr[$i][1]++;36                  $Continue = FALSE;37                 }38              else {39                  if( $EachTagStr[$i+1][0] ) $Continue = TRUE;40                    else {41                      $EachTagStr[$i+1][0] = $EachTag;42                      $EachTagStr[$i+1][1] = 1;43                      $Continue = FALSE;44                    }45              }46         } else { //initialize the array $EachTagStr[][]47                  $EachTagStr[$i][0] = $EachTag;48                  $EachTagStr[$i][1] = 1;49                  $Continue = FALSE;50             }51         }52     }53     return $EachTagStr;54 }55 56 function ShowTag($Row,$ablink){57      $i = 0;58      while($Row[$i][0]){59      $EachTag = $Row[$i][0];60      $EachCount = $Row[$i][1];61      $Size = SetSize($EachCount);62      echo " ".$EachTag."(".$EachCount.")"." ";63      $i++;64     }65 }66 67 function GetTag(){68      $QuerySet = mysql_query("select * from article");69      while($Row = mysql_fetch_array($QuerySet)){70          $Tag = $Row['tag'];71          $TagString = $TagString.",".$Tag;72         }73      return $TagString;74 }75 76 function SetSize($Size){77      $Size += 10;78      if($Size > 30)79      $Size = 30;80      return $Size;81 }82 83 //Go 84 echo "
     
      ";85 echo "
      
标签云
";86 $String = GetTag();87 $Row = CountTag($String);88 ShowTag($Row,$ablink);89 echo "
     
";90 91 ?>

 

OK,DONE!