php 根据词频生成tag标签云的解决办法
内容摘要
这篇文章主要为大家详细介绍了php 根据词频生成tag标签云的简单示例，具有一定的参考价值，可以用来参考一下。
给定一段文本，此代码分析文本的词频分布，生成tag云，对此感兴趣的朋
给定一段文本，此代码分析文本的词频分布，生成tag云，对此感兴趣的朋
文章正文
这篇文章主要为大家详细介绍了php 根据词频生成tag标签云的简单示例，具有一定的参考价值，可以用来参考一下。
给定一段文本，此代码分析文本的词频分布，生成tag云，对此感兴趣的朋友，看看idc笔记做的技术笔记。经测试代码如下：
<?php
/**
* 分析文本的词频分布，生成tag云
*
* @param
* @arrange （www.idcnote.com）
**/
// 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 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://www.google.com/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://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/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>
/*** 代码来自php教程（www.idcnote.com） ***/注：关于php 根据词频生成tag标签云的简单示例的内容就先介绍到这里，更多相关文章的可以留意
代码注释
作者：喵哥笔记
