如何删除像这样的数组中的重复项? [英] How can I remove duplicates in an array like this?

问题描述

如何删除像这样的数组中的重复项?

How can i remove duplicates in an array like this?

我的数组$ test1给出了这个信息:

My array $test1 gives me this out:

Array ( 
[0] => Array ( [id] => 47523 [date] => 12-02-13 14:36:32 ) 
[1] => Array ( [id] => 47523 [date] => 12-02-13 13:56:48 ) 
[2] => Array ( [id] => 38639 [date] => 12-02-13 13:38:51 ) 
[3] => Array ( [id] => 38639 [date] => 12-02-13 13:07:43 )

)

我的数组$ test2给出了这个信息:

My array $test2 gives me this out:

Array ( 
[0] => Array ( [id] => 47523 [date] => 12-02-13 14:36:32 ) 
[1] => Array ( [id] => 47523 [date] => 12-02-13 13:56:48 ) 
[2] => Array ( [id] => 38639 [date] => 12-02-13 13:38:51 ) 
[3] => Array ( [id] => 38639 [date] => 12-02-13 13:07:43 )
[4] => Array ( [id] => 53241 [date] => 12-02-13 11:02:48 )
)

但是我希望输出的是最新的日期

But I want the output to be that way with the latest date

Array ( 
[0] => Array ( [id] => 53241 [date] => 03-02-13 11:02:48 )
)

我该怎么办?

推荐答案

$test1 = array ( 
    array ( "id" => 47523, "date" => "12-02-13 14:36:32" ), 
    array ( "id" => 47523, "date" => "12-02-13 13:56:48" ), 
    array ( "id" => 38639, "date" => "12-02-13 13:38:51" ), 
    array ( "id" => 38639, "date" => "12-02-13 13:07:43" )
);
$test2 = array ( 
    array ( "id" => 47523, "date" => "12-02-13 14:36:32" ), 
    array ( "id" => 47523, "date" => "12-02-13 13:56:48" ), 
    array ( "id" => 38639, "date" => "12-02-13 13:38:51" ), 
    array ( "id" => 38639, "date" => "12-02-13 13:07:43" ),
    array ( "id" => 53241, "date" => "12-02-13 11:02:48" )
);
foreach($test2 as $array) {
    if (!in_array($array, $test1)) {
        $new[] = $array;
    }
}
print_r($new);

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