用PHP写了个标签按点击率的字体大小和颜色的显示效果-PHP源码-php.cn

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用PHP写了个标签按点击率的字体大小和颜色的显示效果

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Jun 08, 2016 pm 05:31 PM

floatnbspquotselect

按标签的点击率来设置标签字体的大小和颜色

本程序没有考虑程序性能和函数封装。。。只想表达这个算法

具体代码如下：

php
    function showTag($cur=47,$tag="美女和野兽"){
        $maxSize=300;$minSize=30;//maxSize为标签字体最大大小,minSize为标签最小大小按百分比
        $max=100;$min=8;//max为最多标签点击数 min为最少点击数 cur为当前标签当前点击数
        $tagColor=$tagSize=$minSize;#tagColor为标签最终颜色，tagsize为标签最终字体大小
        $tagSize=@(float)($cur-$min)/($max-$min)*($maxSize-$minSize);

        $colors=array("0.2"=>"#333333","0.4"=>"#0033CC","0.6"=>"#660099","0.8"=>"#00FFFF","1"=>"#FF0000");
        //color为存放颜色的数组，按百分百存放，例如在0-0.2之间的color1
        $colorkeys=array_keys($colors);

        $select=(float)($cur-$min)/($max-$min);
        $len=count($colorkeys);
        $i=0;$j=$len-1;
        while($i$j){//二分查找
            $index=($i+$j)/2;
            if($select>=(float)$colorkeys[$index] && $select(float)$colorkeys[$index+1]) break;
            elseif($select(float)$colorkeys[$index]) $j--;
            elseif($select>(float)$colorkeys[$index]) $i++;
            elseif($select==(float)$colorkeys[$index+1]) break;
            else break;
        }
        $tagColor=$colors[$colorkeys{($i+$j)/2}];
        echo "$tag ";
    }
    showTag(90);showTag(66,"股民");showTag(50,"我的爱情");showTag(100,"MM");
?>

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