Php 返回包含重复项的数组

我有一个多维数组，我只想保留副本最多的条目。我得到的最接近的结果是：

$wd = array_unique($arr);
$d = array_diff($arr, $wd);
print_r($d);

但这只适用于一维数组并输出所有副本。我该怎么做呢

所需输出的示例：

如果阵列为：

array(
    [1] => ( 
        [u] => test1u 
        [d] => test1d
    ) 
    [2] => ( 
        [u] => test2u 
        [d] => test2d
    ) 
    [3] => ( 
        [3] => test3u 
        [3] => test3d
    ) 
    [1] => ( 
        [u] => test1u 
        [d] => test1d
    )
)

array(
    [1] => ( 
        [u] => test1u 
        [d] => test1d
    ) 
    [2] => ( 
        [u] => test2u 
        [d] => test2d
    ) 
    [3] => ( 
        [3] => test3u 
        [3] => test3d
    ) 
    [1] => ( 
        [u] => test1u 
        [d] => test1d
    ) 
    [2] => ( 
        [u] => test2u 
        [d] => test2d
    )
)

array(
    [1] => ( 
         [u] => test1u 
         [d] => test1d
    ) 
    [2] => ( 
         [u] => test2u 
         [d] => test2d
    ) 
    [3] => ( 
         [3] => test3u 
         [3] => test3d
    ) 
    [1] => ( 
         [u] => test1u 
         [d] => test1d
    ) 
    [2] => ( 
         [u] => test2u 
         [d] => test2d
    ) 
    [1] => ( 
         [u] => test1u 
         [d] => test1d
    )
)

它应该返回

数组（[1]=>（[u]=>test1u[d]=>test1d））

如果阵列为：

array(
    [1] => ( 
        [u] => test1u 
        [d] => test1d
    ) 
    [2] => ( 
        [u] => test2u 
        [d] => test2d
    ) 
    [3] => ( 
        [3] => test3u 
        [3] => test3d
    ) 
    [1] => ( 
        [u] => test1u 
        [d] => test1d
    )
)

array(
    [1] => ( 
        [u] => test1u 
        [d] => test1d
    ) 
    [2] => ( 
        [u] => test2u 
        [d] => test2d
    ) 
    [3] => ( 
        [3] => test3u 
        [3] => test3d
    ) 
    [1] => ( 
        [u] => test1u 
        [d] => test1d
    ) 
    [2] => ( 
        [u] => test2u 
        [d] => test2d
    )
)

array(
    [1] => ( 
         [u] => test1u 
         [d] => test1d
    ) 
    [2] => ( 
         [u] => test2u 
         [d] => test2d
    ) 
    [3] => ( 
         [3] => test3u 
         [3] => test3d
    ) 
    [1] => ( 
         [u] => test1u 
         [d] => test1d
    ) 
    [2] => ( 
         [u] => test2u 
         [d] => test2d
    ) 
    [1] => ( 
         [u] => test1u 
         [d] => test1d
    )
)

它应该返回

数组（[1]=>（[u]=>test1u[d]=>test1d）[2]=>（[u]=>test2u[d]=>test2d））

但如果数组是：

array(
    [1] => ( 
        [u] => test1u 
        [d] => test1d
    ) 
    [2] => ( 
        [u] => test2u 
        [d] => test2d
    ) 
    [3] => ( 
        [3] => test3u 
        [3] => test3d
    ) 
    [1] => ( 
        [u] => test1u 
        [d] => test1d
    )
)

array(
    [1] => ( 
        [u] => test1u 
        [d] => test1d
    ) 
    [2] => ( 
        [u] => test2u 
        [d] => test2d
    ) 
    [3] => ( 
        [3] => test3u 
        [3] => test3d
    ) 
    [1] => ( 
        [u] => test1u 
        [d] => test1d
    ) 
    [2] => ( 
        [u] => test2u 
        [d] => test2d
    )
)

array(
    [1] => ( 
         [u] => test1u 
         [d] => test1d
    ) 
    [2] => ( 
         [u] => test2u 
         [d] => test2d
    ) 
    [3] => ( 
         [3] => test3u 
         [3] => test3d
    ) 
    [1] => ( 
         [u] => test1u 
         [d] => test1d
    ) 
    [2] => ( 
         [u] => test2u 
         [d] => test2d
    ) 
    [1] => ( 
         [u] => test1u 
         [d] => test1d
    )
)

它应该只返回

数组（[1]=>（[u]=>test1u[d]=>test1d））

编辑：

数组中存在重复项，因为数组来自

$arr=json\u decode（$arr）

和原始JSON有重复的条目。 如果有更好的方法不用解码json，请告诉我

这是作为搜索程序的一部分使用的。JSON是源数组中满足某个搜索条件的所有条目的数组。保留副本最多的条目可以确保这些条目包含大部分（如果不是全部的话）搜索词

下面是正在解码的JSON文件：

[{"1":[{"u":"testing","d":"2017\/04\/27","st":"Test","i":"roses","v":"1","t":"org","sp":"N\/A","k":"0","img":"--"}]},{"2":[{"u":"testing","d":"2017\/04\/27","st":"Test","i":"roses","v":"1","t":"org","sp":"N\/A","k":"0","img":"--"}]},{"5":[{"u":"testing","d":"2017\/04\/27","st":"Test","i":"roses daffodil","v":"1","t":"org","sp":"N\/A","k":"0","img":"--"}]},{"3":[{"u":"testing","d":"2017\/04\/27","st":"Test","i":"daffodil","v":"1","t":"org","sp":"N\/A","k":"0","img":"--"}]},{"4":[{"u":"testing","d":"2017\/04\/27","st":"Test","i":"daffodil","v":"1","t":"org","sp":"N\/A","k":"0","img":"--"}]},{"5":[{"u":"testing","d":"2017\/04\/27","st":"Test","i":"roses daffodil","v":"1","t":"org","sp":"N\/A","k":"0","img":"--"}]},{"6":[{"u":"testing","d":"2017\/04\/27","st":"Test","i":"roses daffodil","v":"1","t":"org","sp":"N\/A","k":"0","img":"--"}]}]

---

在本例中，生成此JSON的搜索是为了“roses daffodil”

它添加的第二个示例–每个索引只能出现一次。 对于第一种情况，这应该很好：

<?php

$array[] = array( 'u' => 'test1u', 'd' => 'test1d' );
$array[] = array( 'u' => 'test2u', 'd' => 'test2d' );
$array[] = array( '3' => 'test3u', '3' => 'test3d' );
$array[] = array( 'u' => 'test1u', 'd' => 'test1d' );
$array[] = array( 'u' => 'test2u', 'd' => 'test2d' );

var_export( $array );
//echo("\n" . array_count_values($array) . "\n");

foreach( $array as $k => $v ){
    foreach( $array as $ke => $ve ){
            if( $k == $ke )
                continue;
            if( $v == $ve ) {
                $d[$k]=$v;
                unset($array[$k]);
            }
    }
}

var_export( $d );

?>

---

不幸的是，

array\u count\u values

只对String和int有效，因此当您有复杂的值时，它不起作用。

首先，数组不能有相同的键。检查一下

---

我找到了解决办法！有点冗长，但它的工作

$json = json_decode($json);
$jsonoutc = $jsonout = "";
$arrid = $arrout = $disp = array();
foreach ($json as $null => $arr){
    foreach ($arr as $key => $null){
        $arrid[] = $key;
    }
}
$vals = array_count_values($arrid);
foreach ($vals as $val => $counted){
    if ($counted > $jsonoutc){
        $jsonoutc = $counted;

    }
}
foreach ($vals as $val => $counted){
    if ($counted == $jsonoutc){
        $arrout[] = $val;

    }
}
foreach ($arrout as $null => $val){
    foreach ($json as $null => $arr){
        foreach ($arr as $key => $list){
            if ($key == $val){
                $disp[$key] = $list;
            }
        }
    }
}
print_r($disp);

执行
var\u export（）
并在可能的情况下更新您的问题，这会很有帮助。一个数组中的键怎么可能重复？当一个数组中有多个相同键的实例时，它们会被覆盖。索引必须是唯一的。