PHP 多维数组有关问题，有点难度

<br />//注册信息<br />$array1 = array(<br />0=>array(<br />'day'=>'2014-3-7',//注册日期<br />'data'=>array(<br />0=>array('uid'=>'0000001'),<br />1=>array('uid'=>'0000002'),<br />3=>array('uid'=>'0000003'),<br />4=>array('uid'=>'0000004'),<br />)<br />),<br />1=>array(<br />'day'=>'2014-3-8',//注册日期<br />'data'=>array(<br />0=>array('uid'=>'0000005'),<br />1=>array('uid'=>'0000007'),<br />2=>array('uid'=>'0000006'),<br />)<br />),<br />2=>array(<br />'day'=>'2014-3-10',//注册日期<br />'data'=>array(<br />0=>array('uid'=>'0000008'),<br />1=>array('uid'=>'0000010'),<br />2=>array('uid'=>'0000009'),<br />3=>array('uid'=>'0000012'),<br />4=>array('uid'=>'0000013'),<br />)<br />),<br />3=>array(<br />'day'=>'2014-3-11',//注册日期<br />'data'=>array(<br />0=>array('uid'=>'0000015'),<br />1=>array('uid'=>'0000014'),<br />2=>array('uid'=>'0000025'),<br />3=>array('uid'=>'0000017'),<br />4=>array('uid'=>'0000018'),<br />)<br />),<br />);<br /><br />//登录日志<br />$array2 = array(<br />0=>array(<br />'day'=>'2014-3-8',//登录日期<br />'ge_data'=>array(<br />0=>array('uid'=>'0000001'),<br />1=>array('uid'=>'0000002'),<br />3=>array('uid'=>'0000003')<br />)<br />),<br />1=>array(<br />'day'=>'2014-3-9',//登录日期<br />'ge_data'=>array(<br />0=>array('uid'=>'0000002'),<br />1=>array('uid'=>'0000007'),<br />2=>array('uid'=>'0000006'),<br />)<br />),<br />2=>array(<br />'day'=>'2014-3-11',//登录日期<br />'ge_data'=>array(<br />0=>array('uid'=>'0000001'),<br />1=>array('uid'=>'0000007'),<br />2=>array('uid'=>'0000008'),<br />3=>array('uid'=>'0000012'),<br />4=>array('uid'=>'0000013'),<br />5=>array('uid'=>'0000003'),<br />6=>array('uid'=>'0000002')<br />)<br />)<br />);<br />

//注册信息<br />$array1 = array(<br />0=>array(<br />'day'=>'2014-3-7',//注册日期<br />'data'=>array(<br />0=>array('uid'=>'0000001'),<br />1=>array('uid'=>'0000002'),<br />3=>array('uid'=>'0000003'),<br />4=>array('uid'=>'0000004'),<br />)<br />),<br />1=>array(<br />'day'=>'2014-3-8',//注册日期<br />'data'=>array(<br />0=>array('uid'=>'0000005'),<br />1=>array('uid'=>'0000007'),<br />2=>array('uid'=>'0000006'),<br />)<br />),<br />2=>array(<br />'day'=>'2014-3-10',//注册日期<br />'data'=>array(<br />0=>array('uid'=>'0000008'),<br />1=>array('uid'=>'0000010'),<br />2=>array('uid'=>'0000009'),<br />3=>array('uid'=>'0000012'),<br />4=>array('uid'=>'0000013'),<br />)<br />),<br />3=>array(<br />'day'=>'2014-3-11',//注册日期<br />'data'=>array(<br />0=>array('uid'=>'0000015'),<br />1=>array('uid'=>'0000014'),<br />2=>array('uid'=>'0000025'),<br />3=>array('uid'=>'0000017'),<br />4=>array('uid'=>'0000018'),<br />)<br />),<br />);<br /> <br />//登录日志<br />$array2 = array(<br />0=>array(<br />'day'=>'2014-3-8',//登录日期<br />'ge_data'=>array(<br />0=>array('uid'=>'0000001'),<br />1=>array('uid'=>'0000002'),<br />3=>array('uid'=>'0000003')<br />)<br />),<br />1=>array(<br />'day'=>'2014-3-9',//登录日期<br />'ge_data'=>array(<br />0=>array('uid'=>'0000002'),<br />1=>array('uid'=>'0000007'),<br />2=>array('uid'=>'0000006'),<br />)<br />),<br />2=>array(<br />'day'=>'2014-3-11',//登录日期<br />'ge_data'=>array(<br />0=>array('uid'=>'0000001'),<br />1=>array('uid'=>'0000007'),<br />2=>array('uid'=>'0000008'),<br />3=>array('uid'=>'0000012'),<br />4=>array('uid'=>'0000013'),<br />5=>array('uid'=>'0000003'),<br />6=>array('uid'=>'0000002')<br />)<br />)<br />);<br /><br />$res = array();<br /><br />//读取每天的注册记录<br />foreach($array1 as $r) {<br />  $day = $r['day'];<br />  $res[$day] = array('day' => $day, 'count' => count($r['data']));<br />  $d = date('z', strtotime($day));<br /><br />  //对于当日注册每个用户<br />  foreach($r['data'] as $us) {<br />    foreach($array2 as $t) {<br />      $rd = date('z', strtotime($t['day']));<br />      //检查他在哪天登录了<br />      foreach($t['ge_data'] as $u) {<br />        if($us['uid'] == $u['uid']) $res[$day]['day_'.($rd-$d)][] = $us['uid']; //保存登录的uid以便于检查<br />      }<br />    }<br />  }<br />}<br />print_r($res);

Array<br>(<br>    [2014-3-7] => Array<br>        (<br>            [day] => 2014-3-7<br>            [count] => 4<br>            [day_1] => Array<br>                (<br>                    [0] => 0000001<br>                    [1] => 0000002<div class="clear">
                 
              
              
        
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