從基於值的多維數組中刪除元素

Question

我想從基於值的多維數組中刪除元素。在這種情況下，如果一個子數組的鍵'year'的值爲2011，那麼我需要這個子數組。

只是爲了記錄：我運行PHP 5.2。

我的數組是這樣的：

Array 
(
    [0] => Array 
     (
      [filmId] => 61359 
      [url] => http://www.moviemeter.nl/film/61359 
      [title] => Unstoppable 
      [alternative_title] => 
      [year] => 2011 
      [thumbnail] => http://www.moviemeter.nl/images/covers/thumbs/61000/61359.jpg 
      [average] => 0 
      [votes_count] => 0 
      [similarity] => 100.00 
      [directors_text] => geregisseerd door Richard Harrison 
      [actors_text] => met Chen Shilony, Ruben Crow en David Powell 
      [genres_text] => Drama/Komedie 
      [duration] => 90 
     ) 
    [1] => Array 
     (
      [filmId] => 87923 
      [url] => http://www.moviemeter.nl/film/87923 
      [title] => Unstoppable 
      [alternative_title] => 
      [year] => 2011 
      [thumbnail] => http://www.moviemeter.nl/images/covers/thumbs/87000/87923.jpg 
      [average] => 0 
      [votes_count] => 0 
      [similarity] => 100.00 
      [directors_text] => geregisseerd door Example Director 
      [actors_text] => met Actor 1, Actor 2 en Actor 3 
      [genres_text] => Drama/Komedie 
      [duration] => 90 
     ) 
    [2] => Array 
     (
      [filmId] => 68593 
      [url] => http://www.moviemeter.nl/film/68593 
      [title] => Unstoppable 
      [alternative_title] => 
      [year] => 2010 
      [thumbnail] => http://www.moviemeter.nl/images/covers/thumbs/68000/68593.jpg 
      [average] => 3.3 
      [votes_count] => 191 
      [similarity] => 100.00 
      [directors_text] => geregisseerd door Tony Scott 
      [actors_text] => met Denzel Washington, Chris Pine en Rosario Dawson 
      [genres_text] => Actie/Thriller 
      [duration] => 98 
     ) 
    [3] => Array 
     (
      [filmId] => 17931 
      [url] => http://www.moviemeter.nl/film/17931 
      [title] => Unstoppable 
      [alternative_title] => Nine Lives 
      [year] => 2004 
      [thumbnail] => http://www.moviemeter.nl/images/covers/thumbs/17000/17931.jpg 
      [average] => 2.64 
      [votes_count] => 237 
      [similarity] => 100.00 
      [directors_text] => geregisseerd door David Carson 
      [actors_text] => met Wesley Snipes, Jacqueline Obradors en Mark Sheppard 
      [genres_text] => Actie/Thriller 
      [duration] => 96 
     ) 
) 

Answer 1

試試這個：

function removeElementWithValue($array, $key, $value){ 
    foreach($array as $subKey => $subArray){ 
      if($subArray[$key] == $value){ 
       unset($array[$subKey]); 
      } 
    } 
    return $array; 
} 

那麼你會這樣稱呼它：

$array = removeElementWithValue($array, "year", 2011); 

Answer 2

試試這個：

function remove_element_by_value($arr, $val) { 
    $return = array(); 
    foreach($arr as $k => $v) { 
     if(is_array($v)) { 
     $return[$k] = remove_element_by_value($v, $val); //recursion 
     continue; 
     } 
     if($v == $val) continue; 
     $return[$k] = $v; 
    } 
    return $return; 
} 

Answer 3

$array[] = array('year' => 2010, "genres_text" => "Drama/Komedie"); 
$array[] = array('year' => 2011, "genres_text" => "Actie/Thriller"); 
$array[] = array('year' => "2010", "genres_text" => "Drama/Komedie"); 
$array[] = array('year' => 2011, "genres_text" => "Romance"); 

print_r(remove_elm($array, "year", 2010)); // removes the first sub-array only 
print_r(remove_elm($array, "year", 201)); // will not remove anything 
print_r(remove_elm($array, "genres_text", "drama", TRUE)); // removes all Drama 
print_r(remove_elm($array, "year", 2011, TRUE)); // removes all 2011 

function remove_elm($arr, $key, $val, $within = FALSE) { 
    foreach ($arr as $i => $array) 
      if ($within && stripos($array[$key], $val) !== FALSE && (gettype($val) === gettype($array[$key]))) 
       unset($arr[$i]); 
      elseif ($array[$key] === $val) 
       unset($arr[$i]); 

    return array_values($arr); 
} 

Answer 4

對於單一的，已知的值，通過多維數組把這個迭代的開頭：

foreach ($array as $subarray) { 
    //beginning of the loop where you do things with your array 
    if ($subarray->$key == '$valueToRemoveArrayBy') continue; 
    //iterate your stuff 
} 

只需跳過整個迭代，如果你的標準是正確的。

或者你也可以做相反的事情。根據口味可能更易於閱讀：

foreach ($array as $subarray) { 
    if ($subarray->$key != $valueToRemoveArrayBy) { 
    //do stuff 
    } 
} 

我不知道。也許這對一些人來說看起來很尷尬。不過，我喜歡它。簡短，快速和簡單。

看起來像在這種情況下過濾的目的是打印出一些內容，並跳過一些，根據一定的標準。如果在循環之前執行過濾，則必須循環遍歷整個事件兩次 - 一次是過濾，一次是打印內容。

如果你這樣做，在循環內部，這是不需要的。除了循環內部外，你也不會改變你的數組，如果你並不總是想特別按照這些標準進行過濾，這可能會有所幫助。

Answer 5

你應該試試這種方式，
$ mainArray是當前數據
$子陣列要刪除

foreach ($mainArray as $key => $mainData){ 
     foreach ($subArray as $subData){ 
      if($mainData['dataId'] == $subData['dataId']){ 
       unset($mainArray[$key]); 
       break; 
      } 
     } 
    } 

    var_dump(array_values($mainArray)); 

這會給你的輸出你數組的新的索引想要的數據。