我有一个数组，它类似于：
Array
(
[0] => Array
(
[date] => 2015-11-01
[price] => 95
)
[1] => Array
(
[date] => 2015-11-08
[price] => 95
)
[2] => Array
(
[date] => 2015-11-15
[price] => 95
)
[3] => Array
(
[date] => 2015-11-03
[price] => 90
)
[4] => Array
(
[date] => 2015-11-04
[price] => 90
)
[5] => Array
(
[date] => 2015-11-05
[price] => 90
)
[6] => Array
(
[date] => 2015-11-06
[price] => 90
)
[7] => Array
(
[date] => 2015-11-07
[price] => 90
)
[8] => Array
(
[date] => 2015-11-08
[price] => 90
)
[9] => Array
(
[date] => 2015-11-09
[price] => 90
)
[10] => Array
(
[date] => 2015-11-10
[price] => 90
)
[11] => Array
(
[date] => 2015-11-11
[price] => 90
)
[12] => Array
(
[date] => 2015-11-12
[price] => 90
)
[13] => Array
(
[date] => 2015-11-13
[price] => 90
)
[14] => Array
(
[date] => 2015-11-14
[price] => 90
)
[15] => Array
(
[date] => 2015-11-15
[price] => 90
)
)
我希望只显示重复日期字段的最低价格值。它需要这样。
Array(
[0] => Array
(
[date] => 2015-11-01
[price] => 95
)
[1] => Array
(
[date] => 2015-11-03
[price] => 90
)
[2] => Array
(
[date] => 2015-11-04
[price] => 90
)
[3] => Array
(
[date] => 2015-11-05
[price] => 90
)
[4] => Array
(
[date] => 2015-11-06
[price] => 90
)
[5] => Array
(
[date] => 2015-11-07
[price] => 90
)
[6] => Array
(
[date] => 2015-11-08
[price] => 90
)
[7] => Array
(
[date] => 2015-11-09
[price] => 90
)
[8] => Array
(
[date] => 2015-11-10
[price] => 90
)
[9] => Array
(
[date] => 2015-11-11
[price] => 90
)
[10] => Array
(
[date] => 2015-11-12
[price] => 90
)
[11] => Array
(
[date] => 2015-11-13
[price] => 90
)
[12] => Array
(
[date] => 2015-11-14
[price] => 90
)
[13] => Array
(
[date] => 2015-11-15
[price] => 90
)
)
请帮忙吗？
如果有人有同样的问题。这是我最后制作的代码。。
for ($row = 0; $row < $p; $row++) {
$id = $arr[$row]['id'];
$date1 = $arr[$row]['date'];
$price1 = $arr[$row]['price'];
for ($row2 = 0; $row2 < $p; $row2++) {
$id2 = $arr[$row2]['id'];
if($id != $id2)
{
$date2 = $arr[$row2]['date'];
$price2 = $arr[$row2]['price'];
if($date1 == $date2)
{
if($price1 > $price2)
{
unset($arr[$row]);
}
}
}
} }
$arr=array_values（$arr）；