php实现根据词频生成tag云的方法
网络编程 2021-07-05 09:09www.168986.cn编程入门
这篇文章主要介绍了php实现根据词频生成tag云的方法,涉及php分析与操作字符串以及标签云的生成技巧,具有一定参考借鉴价值,需要的朋友可以参考下
本文实例讲述了php实现根据词频生成tag云的方法。分享给大家供大家参考。具体如下:
这里给定一段文本,分析文本的词频分布,生成tag云
<?php /** * Tag cloud demo based on word frequency * @author: unknown * @since: 2007-02-27 */ // Store frequency of words in an array $freqData = array(); // Random words $lorem = "Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Phasellus vestibulum ullamcorper tortor. Aenean quis lacus quis neque adipiscing ultricies. Pellentesque tincidunt ligula vitae nibh ornare pharetra. Proin dignissim tortor. Donec et ipsum nec tellus gravida tempor. Aliquam ullamcorper purus vel felis. Praesent faucibus. Curabitur porta. Nulla in lorem quis mi lacinia fringilla. Integer adipiscing mi quis felis. Pellentesque habitant morbi tristique senectus et us et malesuada fames ac turpis egestas. Quisque sagittis ante in arcu. Sed libero enim, venenatis sit amet, vestibulum at, porttitor id, neque. Vestibulum ornare semper erat. Sed tincidunt nibh et massa. Cras sed diam. Quisque blandit enim. Sed nonummy. Aenean mollis turpis quis enim. Nam massa nulla, varius molestie, aliquet et, feugiat eget, nisi. Sed mollis, leo ut pretium placerat, nibh turpis egestas ipsum, sed aliquam neque enim in risus. Nullam nisl. Sed tincidunt leo quis tellus. Mauris non lorem. Aenean tristique justo at arcu. Fusce et lorem. Nam sodales. Mauris condimentum diam. Nam modo. Cum sociis natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus. Cras ac risus. Proin et dolor laoreet mi gravida sodales. Duis bibendum, ipsum posuere egestas posuere, dui lacus feugiat turpis, id tincidunt urna est sit amet est. Cras eu sem. "; // Get individual words and build a frequency table foreach( str_word_count( $lorem, 1 ) as $word ) { // For each word found in the frequency table, //increment its value by one array_key_exists($word,$freqData)?$freqData[$word]++:$freqData[$word]=0; } // ============================================================== // = Function to actually generate the cloud from provided data = // ============================================================== function getCloud($data = array(), $minFontSize = 12, $maxFontSize = 30) { $minimumCount = min( array_values( $data ) ); $maximumCount = max( array_values( $data ) ); $spread = $maximumCount - $minimumCount; $cloudHTML = ''; $cloudTags = array(); $spread == 0 && $spread = 1; foreach( $data as $tag => $count ) { $size = $minFontSize + ( $count - $minimumCount ) * ( $maxFontSize - $minFontSize ) / $spread; $cloudTags[] = '<a style="font-size: ' . floor( $size ) . 'px' . '" class="tag_cloud" href="http://.google./search?q=' . $tag . '" title="\'' . $tag . '\' returned a count of ' . $count . '">' . htmlspecialchars( stripslashes( $tag ) ) . '</a>'; } return join( "\n", $cloudTags ) . "\n"; } ?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://.w3./TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://.w3./1999/xhtml"> <head> <title>Tag Cloud Demo</title> <style type="text/css" media="screen"> /*<![CDATA[*/ .tag_cloud { padding: 3px; text-decoration: none; } .tag_cloud:link { color: #81d601; } .tag_cloud:visited { color: #019c05; } .tag_cloud:hover { color: #ffffff; background: #69da03; } .tag_cloud:active { color: #ffffff; background: #ACFC65; } /*]]>*/ </style> </head> <body> <h1>Sample Tag Cloud</h1> <div id="wrapper"> <?php echo getCloud( $freqData ) ?> </div> </body> </html>
希望本文所述对大家的php程序设计有所帮助。
编程语言
- 机械手焊接机器人编程 机械手焊接设备编程
- vb数据库编程实例,vb做数据库
- tiobe世界编程语言排行榜,全球编程语言排行
- 成都java编程培训 成都it编程培训中心
- 编程基础培训,编程基础知识培训
- flash游戏编程基础教程,flash游戏开发教程
- 不会英语能学编程吗 不会英语可以学程序员吗
- 爱心代码编程C语言 爱心代码编程c语言公式
- c语言编程学习入门 c语言编程快速入门
- 西门子plc编程培训 西门子plc编程培训班
- 哪里可以学编程 台州哪里可以学编程
- 少儿编程哪个好 少儿编程哪个品牌好
- 编程是什么意思,图形编程是什么意思
- c语言编程软件下载,c语言编程软件在哪下载
- java编程软件下载,java编程下载手机版
- ug编程培训学校,ug编程培训教程