1.根据当前时间计算n天后的时间 $info = (new datetime($nowdate))->add(new dateinterval("p{$days}d"))->format('y-m-d’);2.根据一个指定的时间获取改天是周几$weekarray=array("日","一","二","三","四","五","六");echo "星期".$weekarray[date("w","2015-11-26")];3.二维数组排序$data = array(); $data[] = array('volume' => 67, 'edition' => 2); $data[] = array('volume' => 86, 'edition' => 1); $data[] = array('volume' => 85, 'edition' => 6); $data[] = array('volume' => 98, 'edition' => 2); $data[] = array('volume' => 86, 'edition' => 6); $data[] = array('volume' => 67, 'edition' => 7); // 取得列的列表 foreach ($data as $key => $row) { $volume[$key] = $row['volume']; $edition[$key] = $row['edition']; } array_multisort($volume, sort_desc, $edition, sort_asc, $data);4.数组去重去空$newdata = array_unique(array_filter($olddata));
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