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
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：
代码如下:
//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 " "; ?>
以上就是php实现标签云的代码的详细内容。