將兩個數組元素合併爲一個

Question

如何才能將「藝術家」值與「標題」值合併爲一個值？如果有幫助，我使用PHP 5.2.4。

我有這樣的陣列

Array 
(
    [0] => Array 
     (
      [artist] => Narcosis 
      [title] => Destruir 
      [duration] => 137 
      [date] => 1370807642 
      [genre_id] => 18 
     ) 

    [1] => Array 
     (
      [artist] => Ricardo Palma Fanjul 
      [title] => Mutant 
      [duration] => 347 
      [date] => 1448227909 
      [genre_id] => 18 
     ) 

) 

預期輸出會是這樣，只顯示元素 「標題」 有兩次的值：

Array 
(
    [0] => Array 
     (
      [title] => Narcosis - Destruir 
      [duration] => 137 
      [date] => 1370807642 
      [genre_id] => 18 
     ) 

    [1] => Array 
     (
      [title] => Ricardo Palma Fanjul - Mutant 
      [duration] => 347 
      [date] => 1448227909    
      [genre_id] => 18 
     ) 

) 

Answer 1

試試這個：

$new = array_map(function($v) { 
    $v['title'] = $v['artist'].' - '.$v['title']; 
    unset($v['artist']); 
    return $v; 
}, $arr); 

OR

foreach ($arr as &$a) { 
    $a['title'] = $a['artist'].' - '.$a['title']; 
    unset($a['artist']); 
} 

Answer 2

試試這個：

foreach ($mainArr as $index=>$subArr) { 
    $subArr['title'] = $subArr['artist'].' - '.$subArr['title']; 
    unset($subArr['artist']); 
    $mainArr[$index] = $subArr; 
} 

mainArr是上面聲明的數組。

p.s.我沒有測試此的代碼，但