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：

复制代码 代码如下:

/**

* WNiaoBlog Tag Template ShowTag

*

* @package WNiaoBlog

*

* @subpackage Tag

*/

//Connect the database

//include('../include/config.php');

/**

* CountTag() - Statistics labels appear the number,and the data to be stored in the two array

*

* GetTag() - Access the Tag's Labels from the database

*/

function CountTag($String){

$TagString = $String;

//echo $TagString."

";

$Tags = explode(",",$TagString);

$n = 1;

$i = 0;

$Continue = TRUE;

//echo $Tags[1]."

";

//in case no-label's article

while($Tags[$n] OR $Tags[++$n] OR $Tags[++$n] ){

$EachTag = $Tags[$n++];

//echo $EachTag."

";

$Continue = TRUE;

for($i=0;$Continue;$i++){

if( $EachTagStr[$i][0] ) {

if( $EachTagStr[$i][0] == $EachTag ){

$EachTagStr[$i][1]++;

$Continue = FALSE;

}

else {

if( $EachTagStr[$i+1][0] ) $Continue = TRUE;

else {

$EachTagStr[$i+1][0] = $EachTag;

$EachTagStr[$i+1][1] = 1;

$Continue = FALSE;

}

}

} else { //initialize the array $EachTagStr[][]

$EachTagStr[$i][0] = $EachTag;

$EachTagStr[$i][1] = 1;

$Continue = FALSE;

}

}

}

return $EachTagStr;

}

function ShowTag($Row,$ablink){

$i = 0;

while($Row[$i][0]){

$EachTag = $Row[$i][0];

$EachCount = $Row[$i][1];

$Size = SetSize($EachCount);

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.")"." ";

$i++;

}

}

function GetTag(){

$QuerySet = mysql_query("select * from article");

while($Row = mysql_fetch_array($QuerySet)){

$Tag = $Row['tag'];

$TagString = $TagString.",".$Tag;

}

return $TagString;

}

function SetSize($Size){

$Size += 10;

if($Size > 30)

$Size = 30;

return $Size;

}

//Go

echo "

";

echo "标签云";

$String = GetTag();

$Row = CountTag($String);

ShowTag($Row,$ablink);

echo "

";

?>

OK,DONE!