PHP的如何減少基於鍵的值

我有一個這樣的數組的數組：PHP的如何減少基於鍵的值

Array 
(
    [0] => Array 
     (
      [CommodityID] => 10 
      [RetailerID] => 1798 
      [Name] => Petrol 
      [City] => Parow 
      [Line1] => 49 Fifth Avenue 
      [Line2] => 
      [Line3] => 
      [ContractorName] => BP Fifth Ave Motors Parow 
      [AreaCode] => 021 
      [Number] => 9305025 
      [Latitude] => -33.896493 
      [Longitude] => 18.579302 
      [LogoUrl] => https://webservices.test.com/ContractorLogos/bp.png 
      [dist] => 0.00 
     ) 

    [1] => Array 
     (
      [CommodityID] => 10 
      [RetailerID] => 1798 
      [Name] => Petrol 
      [City] => Parow 
      [Line1] => 49 Fifth Avenue 
      [Line2] => 
      [Line3] => 
      [ContractorName] => BP Fifth Ave Motors Parow 
      [AreaCode] => 021 
      [Number] => 9305025 
      [Latitude] => -33.896493 
      [Longitude] => 18.579302 
      [LogoUrl] => https://webservices.test.com/ContractorLogos/bp.png 
      [dist] => 0.00 
     ) 

    [2] => Array 
     (
      [CommodityID] => 22 
      [RetailerID] => 1758 
      [Name] => Jewellers 
      [City] => Parow 
      [Line1] => Shop 4 
      [Line2] => Mc Intyre Square 
      [Line3] => Mc Intyre Road 
      [ContractorName] => Du Plessis Manufacturing Jewellers Parow 
      [AreaCode] => 021 
      [Number] => 9300788 
      [Latitude] => -33.895200 
      [Longitude] => 18.586710 
      [LogoUrl] => https://webservices.test.com/ContractorLogos/DuPlessisJewellers.png 
      [dist] => 0.01 
     ) 
)

我只是想有隻獨特的[RetailerID]即：

Array 
(
    [0] => Array 
     (
      [CommodityID] => 10 
      [RetailerID] => 1798 
      [Name] => Petrol 
      [City] => Parow 
      [Line1] => 49 Fifth Avenue 
      [Line2] => 
      [Line3] => 
      [ContractorName] => BP Fifth Ave Motors Parow 
      [AreaCode] => 021 
      [Number] => 9305025 
      [Latitude] => -33.896493 
      [Longitude] => 18.579302 
      [LogoUrl] => https://webservices.test.com/ContractorLogos/bp.png 
      [dist] => 0.00 
     ) 

    [1] => Array 
     (
      [CommodityID] => 22 
      [RetailerID] => 1758 
      [Name] => Jewellers 
      [City] => Parow 
      [Line1] => Shop 4 
      [Line2] => Mc Intyre Square 
      [Line3] => Mc Intyre Road 
      [ContractorName] => Du Plessis Manufacturing Jewellers Parow 
      [AreaCode] => 021 
      [Number] => 9300788 
      [Latitude] => -33.895200 
      [Longitude] => 18.586710 
      [LogoUrl] => https://webservices.test.com/ContractorLogos/DuPlessisJewellers.png 
      [dist] => 0.01 
     ) 
)

我有嘗試array_unique，但似乎基於所有列使其唯一。有沒有一個php內置函數可以通過查看一個數組鍵的值來實現？

來源

2017-06-22 Jacques

可能重複：[https://stackoverflow.com/questions/6057151/multidimensional-array-unique-based-on-value- not-array-key]（多維數組唯一基於值的非數組鍵） –

[多維數組基於值（不是數組鍵）唯一可能的副本]（https://stackoverflow.com/questions/6057151/multidimensional-array-unique-based-value-not-array-key） –

會遍歷數組一次，並通過現場一度挽救唯一的值，例如：

$newArray = array(); 
foreach($array as $item) { 
$newArray[$item['RetailerID']] = $item; 
}

這將始終只保存同種的最後一個項目。您可以修改邏輯以符合您的需求。另一種更安全的可能性是節省了獨特的價值觀和檢查他們：

$exists = array(); 
$newArray = array(); 
    foreach($array as $item) { 
    if(!in_array($item['RetailerID'],$exists)){ 
     $newArray[$item['RetailerID']] = $item; 
     $exists[] = $item['RetailerID']; 
    } 

    }

來源

2017-06-22 11:39:03

謝謝先生。工作很好。 – Jacques

PHP的如何減少基於鍵的值

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