{"id":548,"date":"2013-01-11T10:47:32","date_gmt":"2013-01-11T02:47:32","guid":{"rendered":"https:\/\/yanjingang.com\/blog\/?p=548"},"modified":"2018-12-17T20:38:01","modified_gmt":"2018-12-17T12:38:01","slug":"php-%e6%8c%89%e6%af%94%e9%87%8d%e9%9a%8f%e6%9c%ba%e6%8a%bd%e6%a0%b7-%e6%96%b9%e6%b3%95","status":"publish","type":"post","link":"https:\/\/yanjingang.com\/blog\/?p=548","title":{"rendered":"php \u6309\u6bd4\u91cd\u968f\u673a\u62bd\u6837 \u65b9\u6cd5"},"content":{"rendered":"
\n
\/**<\/div>\n
\u00a0* \u6309\u6bd4\u91cd\u968f\u673a\u62bd\u6837<\/div>\n
\u00a0* @author yanjingang@mail.com<\/div>\n
\u00a0* @param array $weight \u968f\u673a\u503c=>\u6bd4\u91cd \u4f8b\u5982array(‘a’=>20,’b’=>30,’c’=>50)<\/div>\n
\u00a0* @return string key \u952e\u540d<\/div>\n
\u00a0*\/<\/div>\n
function randByWeight($weight = array()) {<\/div>\n
$rand = rand(1, array_sum($weight));<\/div>\n
<\/div>\n
$randval = 0;<\/div>\n
$_tmpw = 0;<\/div>\n
foreach ($weight as $k => $w) {<\/div>\n
$min = $_tmpw;<\/div>\n
$_tmpw += $w;<\/div>\n
$max = $_tmpw;<\/div>\n
if ($rand > $min && $rand <= $max) {<\/div>\n
$randval = $k;<\/div>\n
break;<\/div>\n
}<\/div>\n
}<\/div>\n
return $randval;<\/div>\n
}<\/div>\n<\/div>\n
\n
\/\/\u6d4b\u8bd5<\/div>\n
$key = randByWeight(array(‘a’ => 200, ‘b’ => 300, ‘c’ => 500));<\/div>\n
\/\/\u968f\u673a\u6bd4\u91cd\u9a8c\u8bc1<\/div>\n
\/* \u5404\u5206\u503c\u51fa\u73b0\u6bd4\u91cd\uff1a<\/div>\n
1\u5206——5%<\/div>\n
2\u5206——20%<\/div>\n
3\u5206——10%<\/div>\n
4\u5206——4%<\/div>\n
5\u5206——35%<\/div>\n
6\u5206——4%<\/div>\n
7\u5206——4%<\/div>\n
8\u5206——8%<\/div>\n
9\u5206——4%<\/div>\n
10\u5206——6%<\/div>\n
\u00a0*\/<\/div>\n
$rands = array();<\/div>\n
for($i=0;$i<100;$i++){<\/div>\n
$key = randByWeight(array(1=>5,2=>20,3=>10,4=>4,5=>35,6=>4,7=>4,8=>8,9=>4,10=>6));<\/div>\n
if(isset($rands[$key]))<\/div>\n
$rands[$key]++;<\/div>\n
else<\/div>\n
$rands[$key] = 1;<\/div>\n
}<\/div>\n
arsort($rands);<\/div>\n
var_dump($rands);<\/div>\n
\/* \u968f\u673a100\u6b21\u7ed3\u679c\uff1a<\/div>\n
\u00a0\u5206\u6570 => \u968f\u673a\u51fa\u73b0\u6b21\u6570<\/div>\n
\u00a05 => 31<\/div>\n
\u00a02 => 23<\/div>\n
\u00a08 => 15<\/div>\n
\u00a010 => 8<\/div>\n
\u00a03 => 7<\/div>\n
\u00a07 => 5<\/div>\n
\u00a04 => 5<\/div>\n
\u00a06 => 3<\/div>\n
\u00a09 => 2<\/div>\n
\u00a01 => 1<\/div>\n

*\/<\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

\u6309\u6bd4\u91cd\u968f\u673a\u62bd\u6837\u7684\u65b9\u6cd5\u3002<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[2],"tags":[5,298],"_links":{"self":[{"href":"https:\/\/yanjingang.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/548"}],"collection":[{"href":"https:\/\/yanjingang.com\/blog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/yanjingang.com\/blog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/yanjingang.com\/blog\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/yanjingang.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=548"}],"version-history":[{"count":0,"href":"https:\/\/yanjingang.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/548\/revisions"}],"wp:attachment":[{"href":"https:\/\/yanjingang.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=548"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/yanjingang.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=548"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/yanjingang.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=548"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}