php分析与操作字符串以及标签云的生成
程序员文章站
2022-03-19 15:57:22
...
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。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 netus 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 commodo. 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 inpidual 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://www.google.com/search?q=' . $tag . '" title="\'' . $tag . '\' returned a count of ' . $count . '">' . htmlspecialchars( stripslashes( $tag ) ) . '</a>'; } return join( "\n", $cloudTags ) . "\n"; } ?> <!DOCTYPE html> <html> <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> <p id="wrapper"> <?php echo getCloud( $freqData ) ?> </p> </body> </html>
总结:以上就是本篇文的全部内容,希望能对大家的学习有所帮助。
相关推荐:
以上就是php分析与操作字符串以及标签云的生成的详细内容,更多请关注其它相关文章!