标签云的实现代码

效果网站 - 自动化1102： http://huxuemail.web-104.com 

乌鸟heart - 博客园： 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 <?PHP
 2 /**
 3  * WNiaoBlog Tag Template ShowTag
 4  *
 5  * @package WNiaoBlog
 6  *
 7  * @subpackage Tag
 8  */
 9 
10 //Connect the database
11 //include(\'../include/config.php\');
12 
13 /**
14  * CountTag() - Statistics labels appear the number,and the data to be stored in the two array
15  *
16  * GetTag() - Access the Tag\'s Labels from the database
17  */
18 
19 function CountTag($String){
20      $TagString = $String; 
21      //echo $TagString."<br><br><br>";
22      $Tags = explode(",",$TagString);
23      $n = 1;
24      $i = 0;
25      $Continue = TRUE;
26      //echo $Tags[1]."<br><br><br>";
27      //in case no-label\'s article
28      while($Tags[$n] OR $Tags[++$n] OR $Tags[++$n] ){
29      $EachTag = $Tags[$n++];
30      //echo $EachTag."<br><br><br>";
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 "<a style=\'color:BLUE ; font-size:".$Size." \' onMouseOver=this.style.color=\'#900000\' onMouseOut=this.style.color=\'BLUE\'  href=\'".$ablink."tag?tag=".$EachTag."\' target=\'_self\' > ".$EachTag."(".$EachCount.")"." </a>";
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 "<div id=showtag>";
85 echo "<p  class=\'med1\' style=\'color:#046111\'  >标签云</p>";
86 $String = GetTag();
87 $Row = CountTag($String);
88 ShowTag($Row,$ablink);
89 echo "</div>";
90 
91 ?>

 

OK,DONE!