找到阵副本，添加到原来的，然后删除

Question

当重复在URL找到我想：

1. 采取“分数”，并把它添加到原
2. 采取“引擎”字符串其追加到原来的
3. 然后删除整个重复条目

array 
    0 => 
    array 
     'url' => string 'http://blahhotel.com/' 
     'score' => int 1 
     'engine' => string 'cheese' 
    1 => 
    array 
     'url' => string 'http://www.blahdvd.com/' 
     'score' => int 2 
     'engine' => string 'cheese' 
    2 => 
    array 
     'url' => string 'http://blahhotel.com/' 
     'score' => int 1 
     'engine' => string 'pie' 
    3 => 
    array 
     'url' => string 'http://dictionary.reference.com/browse/blah' 
     'score' => int 2 
     'engine' => string 'pie' 
    4 => 
    array 
     'url' => string 'http://dictionary.reference.com/browse/blah' 
     'score' => int 1 
     'engine' => string 'apples' 

它应该是这样的结尾：

array 
    0 => 
    array 
     'url' => string 'http://blahhotel.com/' 
     'score' => int 2 
     'engine' => string 'cheese, pie' 
    1 => 
    array 
     'url' => string 'http://www.blahdvd.com/' 
     'score' => int 2 
     'engine' => string 'cheese' 
    3 => 
    array 
     'url' => string 'http://dictionary.reference.com/browse/blah' 
     'score' => int 3 
     'engine' => string 'pie, apples' 

Answer 1

我相信这符合您的要求。

基于您提供的期望输出，您似乎希望保留每个条目的数字索引。如果您实际上不需要保留这些数字，则可以删除第二个foreach循环和有关$indices变量的行，然后仅返回$tmpList。

function reduceEntries($entries) 
{ 
    $tmpList = array(); 
    $indices = array(); 

    foreach ($entries as $i => $entry) { 
     if (isset($tmpList[$entry['url']])) { 
      $tmpList[$entry['url']]['score'] += $entry['score']; 
      $tmpList[$entry['url']]['engine'] .= ', ' . $entry['engine']; 
     } else { 
      $tmpList[$entry['url']] = $entry; 
      $indices[$entry['url']] = $i; 
     } 
    } 

    // rebuild final array with indices 
    $finalList = array(); 
    foreach ($tmpList as $url => $entry) { 
     $finalList[$indices[$url]] = $entry; 
    } 

    return $finalList; 
} 

（这里的a working example上键盘。）