Question

我有一个这样的数组：

Array
(
    [0] => Array
        (
            [fileid] => 7
            [remarks] => 
            [filename] => whomovedmycheese - Copy.pdf
            [type] => application/pdf
            [size] => 500624
        )

    [1] => Array
        (
            [fileid] => 7
            [remarks] => 
            [filename] => whomovedmycheese.pdf
            [type] => application/pdf
            [size] => 500624
        )

    [2] => Array
        (
            [fileid] => 8
            [remarks] => 
            [filename] => whomovedmycheese - Copy.pdf
            [type] => application/pdf
            [size] => 500624
        )

    [3] => Array
        (
            [fileid] => 8
            [remarks] => 
            [filename] => whomovedmycheese.pdf
            [type] => application/pdf
            [size] => 500624
        )

)

这是我要删除重复的数组。我尝试使用下面的代码删除重复的内容。

$input4 = array_map("unserialize", array_unique(array_map("serialize", $basicinfo3)));
$new_data3 = array_values($input4);

但结果仍然与起始数组相同。在上面的代码中，$basicinfo具有上面数组的值。我想要做的是删除重复数组，使其如下所示。

Array
    (
        [0] => Array
            (
                [fileid] => 7
                [remarks] => 
                [filename] => whomovedmycheese - Copy.pdf
                [type] => application/pdf
                [size] => 500624
            )

        [1] => Array
            (
                [fileid] => 7
                [remarks] => 
                [filename] => whomovedmycheese.pdf
                [type] => application/pdf
                [size] => 500624
            )
    )

UPDATE

Answer 1

您不能使用上面的那个函数，因为这会考虑整个数组的唯一性，正如您已经看到的，某些fileid已经与相同的文件名不同。如果您需要基于filename，那么正常循环就足够了。

在您的示例输出中，似乎首先找到的是优先级，然后简单的isset应该没问题。

$input4 = array();
foreach($basicinfo3 as $values) {
    if(!isset($input4[$values['filename']])) {
        $input4[$values['filename']] = $values; // if doesn't exist yet, push it
    }
}

$input4 = array_values($input4); // simple reindex

Sample Output

Answer 2

$newArray = array_unique($oldArray, SORT_REGULAR);

请参阅：PHP - Merging two array into one array (also Remove Duplicates)

Answer 3

您可以使用常规的php数组来实现此目的。

<?php
$data = Array
(
    0 => Array
        (
            "fileid" => 7,
            "remarks" => '',
            "filename" => "whomovedmycheese - Copy.pdf",
            "type" => "application/pdf",
            "size" => "500624",
        ),

    1 => Array
        (
            "fileid"=> 7,
             "remarks" => '',
            "filename"=> "whomovedmycheese.pdf",
            "type"=> "application/pdf",
            "size" => "500624",
        ),

    2 => Array
        (
            "fileid"=> 8,
             "remarks"=> '',
            "filename"=> "whomovedmycheese - Copy.pdf",
             "type"=> "application/pdf",
            "size" => "500624",
        ),

    3 => Array
        (
            "fileid"=> 8,
             "remarks"=> '',
            "filename"=> "whomovedmycheese.pdf",
             "type"=> "application/pdf",
            "size" => "500624",
        )
);

$newArray = array();
foreach ($data as $file)
{
   $newArray[$file['filename']] = $file;
}
echo "<pre>";
print_r($newArray);
?>

数组删除相同的PHP

3 个答案: