php瀑布流，把一个数组分4个数组，按照时间排序

简单介绍：把一个数组分成4个数组，取其中1的倍数

<?php

$arr = array(

    '' => '',

    '' => '',

    '' => '',

    '' => '',

    '' => '',

    '' => '',

    '' => '',

    '' => '',

    '' => '',

    '' => '',

    '' => '',

    '' => '',

    '' => '',

);

foreach($arr as $k=>$val){
　　for($i=0;$i<4;$i++){
　　　　$a = $i*4+1;           // 其中的1是倍数，可以是0、1、2、3不能超过4；如果是7，则$i<7;
　　　　if($k==$a){
　　　　　　$item[] = $val;
　　　　}
　　}
}

?>

输出结果
Array ( [0] => 1 [1] => 5 [2] => 9 );

简单介绍：把一个数组分成4个数组，取其中3的倍数

<?php

$arr = array(

    '' => '',

    '' => '',

    '' => '',

    '' => '',

    '' => '',

    '' => '',

    '' => '',

    '' => '',

    '' => '',

    '' => '',

    '' => '',

    '' => '',

    '' => '',

);

foreach($arr as $k=>$val){

　　for($i=;$i<;$i++){

　　　　$a = $i*+;           // 其中的1是倍数，可以是0、1、2、3不能超过4；如果是7，则$i<7;

　　　　if($k==$a){

　　　　　　$item[] = $val;

　　　　}

　　}

}

?>

输出结果

Array ( [0] => 3 [1] => 7 [2] => 11 )

与数据库结合

class IndexAction extends BaseAction

{

    public function index()

    {

        $m = M('article');

        $res = $m->select();

        $f = $this->d($res,);

        print_r($f);

    }

    public function d($arr,$v){

        foreach($arr as $k=>$val){

            for($i=;$i<;$i++){

                $a = $i*+$v;

                if($k==$a){

                    $item[] = $val;

                }

            }

        }

        return $item;

    }

}

输出结果
Array ( [0] => Array ( [id] => 3 [catid] => 1 [userid] => 1 [username] => yourphp [title] => 欧美风2014夏新款韩国名媛精致复合提花拼纱荷叶袖连衣裙 [title_style] => [keywords] => [copyfrom] => [fromlink] => [description] => 欧美风2014夏新款韩国名媛精致复合提花拼纱荷叶袖连衣裙 [content] => 欧美风2014夏新款韩国名媛精致复合提花拼纱荷叶袖连衣裙 [template] => 0 [thumb] => /b/Uploads/201407/53d220e49655a.jpg [posid] => 0 [status] => 1 [recommend] => 1 [readgroup] => [readpoint] => 0 [listorder] => 0 [url] => /b/index.php?m=Article&a=show&id=3 [hits] => 0 [createtime] => 1406279913 [updatetime] => 1406279913 [name] => [lang] => 1 ) )

实例分析：瀑布流

<div>

    <ul>

         <!--第一列-->

         <li></li>

        <!--第二列-->

         <li></li>

        <!--第三列-->

         <li></li>

         <!--第四列-->

         <li></li>

    </ul>

</div>                    

html代码

<!-- screeenA瀑布流 -->

    <div class="screenA">

        <ul>

            <li>

                <volist name="arr_0" id="vo">

                <div class="ka">

                    <div class="im">

                        <img src="{$vo.thumb}" />

                    </div>

                    <div class="text"><a href="{$vo.url}">{$vo.title}</a></div>

                    <div class="t_bot"><div class="zan" style="float:left"><span>赞&nbsp;</span></div><div class="liulan">浏览()</div></div>

                    <div class="line"></div>

                    <div class="ask">

                        <div class="ask_left"><img src="../Public/images/ico_03.jpg" /></div>

                        <div class="ask_rig"><h3>星空下的骑士</h3><span>连体短裤是夏季最凉快和轻便的着装，简单风格</span></div>

                        <div class="clear"></div>

                    </div>

                </div>

                </volist>

            </li>

            <li>

                <volist name="arr_1" id="vo">

                <div class="ka">

                    <div class="im">

                        <img src="{$vo.thumb}" />

                    </div>

                    <div class="text"><a href="{$vo.url}">{$vo.title}</a></div>

                    <div class="t_bot"><div class="zan" style="float:left"><span>赞&nbsp;</span></div><div class="liulan">浏览()</div></div>

                    <div class="line"></div>

                    <div class="ask">

                        <div class="ask_left"><img src="../Public/images/ico_03.jpg" /></div>

                        <div class="ask_rig"><h3>星空下的骑士</h3><span>连体短裤是夏季最凉快和轻便的着装，简单风格</span></div>

                        <div class="clear"></div>

                    </div>

                </div>

                </volist>

            </li>

            <li>

                <volist name="arr_2" id="vo">

                <div class="ka">

                    <div class="im">

                        <img src="{$vo.thumb}" />

                    </div>

                    <div class="text"><a href="{$vo.url}">{$vo.title}</a></div>

                    <div class="t_bot"><div class="zan" style="float:left"><span>赞&nbsp;</span></div><div class="liulan">浏览()</div></div>

                    <div class="line"></div>

                    <div class="ask">

                        <div class="ask_left"><img src="../Public/images/ico_03.jpg" /></div>

                        <div class="ask_rig"><h3>星空下的骑士</h3><span>连体短裤是夏季最凉快和轻便的着装，简单风格</span></div>

                        <div class="clear"></div>

                    </div>

                </div>

                </volist>

            </li>

            <li>

                <volist name="arr_3" id="vo">

                <div class="ka">

                    <div class="im">

                        <img src="{$vo.thumb}" />

                    </div>

                    <div class="text"><a href="{$vo.url}">{$vo.title}</a></div>

                    <div class="t_bot"><div class="zan" style="float:left"><span>赞&nbsp;</span></div><div class="liulan">浏览()</div></div>

                    <div class="line"></div>

                    <div class="ask">

                        <div class="ask_left"><img src="../Public/images/ico_03.jpg" /></div>

                        <div class="ask_rig"><h3>星空下的骑士</h3><span>连体短裤是夏季最凉快和轻便的着装，简单风格</span></div>

                        <div class="clear"></div>

                    </div>

                </div>

                </volist>

            </li>

            <div class="clear"></div>

        </ul>

    </div>

    <!-- screeenA瀑布流End -->

php代码

class IndexAction extends BaseAction

{

    public function index()

    {

        $m = M('article');

        $res = $m->select();

        //print_r($item);

        $arr[] = $this->falls($res,);

        $arr[] = $this->falls($res,);

        $arr[] = $this->falls($res,);

        $arr[] = $this->falls($res,);

        $this->assign('bcid',);//顶级栏目

        $this->assign('arr_0',$this->falls($res,));

        $this->assign('arr_1',$this->falls($res,));

        $this->assign('arr_2',$this->falls($res,));

        $this->assign('arr_3',$this->falls($res,));

        $this->assign('ishome','home');

        $this->display();

    }

    public function falls($arr,$v){

        foreach($arr as $k=>$val){

            for($i=;$i<;$i++){

                $a = $i*+$v;

                if($k==$a){

                    $item[] = $val;

                }

            }

        }

        return $item;

    }

}