作者：枝玫焰 | 来源：互联网 | 2023-05-18 17:34
如：
Array (
[0] => Array ( [id] => 1788 [mm] => 20170330 )
[1] => Array ( [id] => 1871 [mm] => 20170307 )
[2] => Array ( [id] => 1871 [mm] => 20170307 )
[3] => Array ( [id] => 1788 [mm] => 20170307 )
)
id相同并且mm也相同的值只保留一个id
索引 使用 id_mm 拼接
foreach($Array as $value)
{
$new_Array[$value[id].$value[mm]]=$value['id'];
}
$new_Array结果
Array (
[178820170330] => 1788 )
[187120170307] =>1871 )
[178820170307] => 1788 )
)
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