PHP 对二维数组排序
$arr = array(
array('date'=>'2011-04-21','wu'=>'test'),
array('date'=>'2014-04-21','wu'=>'good'),
array('date'=>'2011-12-22','wu'=>'great'),
array('date'=>'2012-05-21','wu'=>'hahah'),
array('date'=>'2013-08-13','wu'=>'test'),
array('date'=>'2011-04-25','wu'=>'yes'),
array('date'=>'2014-04-14','wu'=>'no'),
);
我想将它按照里面date日期来重新排序,得到这样的新数组:
$arr2 = array(
array('date'=>'2011-04-21','wu'=>'test'),
array('date'=>'2011-04-25','wu'=>'yes'),
array('date'=>'2011-12-22','wu'=>'great'),
array('date'=>'2012-05-21','wu'=>'hahah'),
array('date'=>'2013-08-13','wu'=>'test'),
array('date'=>'2014-04-14','wu'=>'no'),
array('date'=>'2014-04-21','wu'=>'good'),
);
请问应该怎样做呢?
回复内容:
现在有一个二维数组
$arr = array(
array('date'=>'2011-04-21','wu'=>'test'),
array('date'=>'2014-04-21','wu'=>'good'),
array('date'=>'2011-12-22','wu'=>'great'),
array('date'=>'2012-05-21','wu'=>'hahah'),
array('date'=>'2013-08-13','wu'=>'test'),
array('date'=>'2011-04-25','wu'=>'yes'),
array('date'=>'2014-04-14','wu'=>'no'),
);
我想将它按照里面date日期来重新排序,得到这样的新数组:
$arr2 = array(
array('date'=>'2011-04-21','wu'=>'test'),
array('date'=>'2011-04-25','wu'=>'yes'),
array('date'=>'2011-12-22','wu'=>'great'),
array('date'=>'2012-05-21','wu'=>'hahah'),
array('date'=>'2013-08-13','wu'=>'test'),
array('date'=>'2014-04-14','wu'=>'no'),
array('date'=>'2014-04-21','wu'=>'good'),
);
请问应该怎样做呢?
直接上代码
$tmp = array();
foreach ($arr as $a) {
$tmp[$a['date'] . '_' . $a['wu'] . '_' . rand(1000000, 9999999)] = $a;
}
asort($tmp);
$arr = array_values($tmp);
使用 array_multisort
参考:http://cn2.php.net/array_multisort
php
$sort = array( 'direction' => 'SORT_ASC', //排序顺序标志 SORT_DESC 降序;SORT_ASC 升序 'field' => 'date', //排序字段 ); $arrSortTmp = array(); foreach($arr AS $uniqid => $row){ foreach($row AS $key=>$value){ $arrSortTmp[$key][$uniqid] = $value; } } array_multisort($arrSortTmp[$sort["field"]],constant($sort["direction"]), $arr); var_dump($arr);
$arr = array(
array('date'=>'2011-04-21','wu'=>'test'),
array('date'=>'2014-04-21','wu'=>'good'),
array('date'=>'2011-12-22','wu'=>'great'),
array('date'=>'2012-05-21','wu'=>'hahah'),
array('date'=>'2013-08-13','wu'=>'test'),
array('date'=>'2011-04-25','wu'=>'yes'),
array('date'=>'2014-04-14','wu'=>'no'),
);
array_multisort($arr, SORT_ASC);
print_r($arr);
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