随机现在文章功能之PHP array_rand()函数
开发中遇到个刷新页面随机取得文章功能,用到了PHP函数中的array_rand()功能,array_rand(array,number),有两个参数,其中array参数是代表着你所要获取某个数组,number可选参数,第二个参数用来确定要选出几个元素,默认是 1。。如果选出的元素不止一个,则返回包含随机键名的数组,否则返回该元素的键名。(记住:理解一下加粗那部分意思),返回的是一个数组键名,不是数组里面的对应值,我刚开始用的时候以为是直接返回一个数值值,老取不到值。我具体用法是这样:
PHP代码
- . .......
- .......
- while($res=mysql_fetch_object($rsql))
- {
- $arr[$i][id]=$res->art_id;
- $arr[$i][url]= siteurl."art-php-"."$res->art_id"..html;
- $arr[$i][title]= $res->art_title;
- $i ;
- }
- $arr1=array_rand($arr,10);
- $arr2=array();
- foreach($arr1 as $key=>$value)
- {
- $arr2[$key][id]=$arr[$value][id];
- $arr2[$key][url]=$arr[$value][url];
- $arr2[$key][title]=$arr[$value][title];
- }
- return $arr2;
下面解释一下我写的代码:
$arr代表我已经获取到的数组, $arr1返回的是随机10个数组键名,再通过foreach根据返回键重新组合数组。

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