时间：2021-07-01 10:21:17 帮助过：4人阅读
class node{
public var $per;
public var $lNode;
public var $rNode;
function test1(){
}
function test2(){
}
}$node0=new node();
$node0->per = 49;
$node1=new node();
$node1->per = 20;
$node2=new node();
$node2->per = 29;
$node0->lNode = $node1;
$node0->rNode = $node2;
<br /> <?php<br /> $s = '4 6 8 9 10 12';<br /> foreach(explode(' ', $s) as $k=>$v) { //初始化<br /> $t[] = array('w' => $v, 'v' => $v); //用值作为权重<br /> }<br /> HuffmanTree($t);<br /> echo DLR($t), PHP_EOL;<br /> <br /> /* 哈夫曼算法 */<br /> function HuffmanTree(&$F) {<br /> while(count($F) > 1) {<br /> $r = array();<br /> foreach($F as $item) $r[] = $item['w'];<br /> array_multisort($r, $F);<br /> $t = array('w' => $F[0]['w']+$F[1]['w'], 'l' => $F[0], 'r' => $F[1]);<br /> unset($F[0]);<br /> unset($F[1]);<br /> $F[] = $t;<br /> }<br /> $F = current($F);<br /> }<br /> /* 前序遍历 */<br /> function DLR($F, $deep=0) {<br /> echo str_repeat(" ", $deep) .'+- ' . $F['w'] . PHP_EOL;//打印权重<br /> if(isset($F['l'])) DLR($F['l'], $deep+1);<br /> if(isset($F['r'])) DLR($F['r'], $deep+1);<br /> }<br /> </pre><br /> <br /> +- 49<br /> +- 20<br /> +- 10<br /> +- 10<br /> +- 4<br /> +- 6<br /> +- 29<br /> +- 12<br /> +- 17<br /> +- 8<br /> +- 9<br /> <br /> </div> <div class=""> <ul class="m-news-opt fix"> <li class="opt-item"> <a href='/PHPjiqiao-118293.html' target='_blank'><p>< 上一篇</p><p class="ellipsis">怎么在不读取全部文件内容的前提下倒序取出文件的最后几条数据</p></a> </li> <li class="opt-item ta-r"> <a href='/PHPjiqiao-118295.html' target='_blank'><p>下一篇 ></p><p class="ellipsis">怎么获取‘/’后面的参数</p></a> </li> </ul> </div> </div> </div> <div class="g-title fix"> <h2 class="title-txt">人气教程排行</h2> </div> <div class="m-rank u-dashed mb40"> <ul> <li class="rank-item"> <a href="/PHPjiqiao-379253.html" title='php如何获取跳转前的url' class="item-name ellipsis" target="_blank"> <span class="g-art-count fr">174次</span> <span class="g-sort-num top">1</span> php如何获取跳转前的url </a> </li> <li class="rank-item"> <a 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