如何刪除數組元素與空值在PHP

Question

我有下面的數組，我從Db檢索，現在如果任何這個數組元素沒有值我想刪除數組元素並重新索引數組，我試着貝代碼，但沒有奏效

array name is $photo 
    Array 
    (
    [0] => Array 
     (
      [photo1] => uploads/_cgL-CMy7JVHxds.jpg 
      [photo2] => 
      [photo3] => uploads/_cgL-CMy7JVHxds.jpg 
      [photo4] => 
      [photo5] => 
      [photo6] => uploads/_cgL-CMy7JVHxds.jpg 
      [photo7] => 
      [photo8] => 
      [photo9] => 
      [photo10] => 
      [photo11] => 
      [photo12] => 
      [photo13] => 
      [photo14] => 
      [photo15] => 
      [photo16] => 
      [photo17] => 
      [photo18] => 
      [photo19] => 
      [photo20] => 
     ) 

    ) 

我想這個代碼

foreach ($photo as $key => $value) { 
     if(array_key_exists($key, $photo) && is_null($photo[$key])) { 
      unset($photo[$key]); 
     } 

我希望我的結果是這樣的

$photo =([photo1]=>uploads/_cgL-CMy7JVHxds.jpg 
      [photo3]=>uploads/_cgL-CMy7JVHxds.jpg 
      [photo6]=>uploads/_cgL-CMy7JVHxds.jpg); 

此感謝任何幫助

Answer 1

在所有的空值，因爲它是在一個數組的數組，你仍然至少需要一個循環，所以你可以使用該代碼並使用array_filter對其進行擴展。只有array_filter不能正常工作。

<?php 

$var = [ 
    [ 
     'photo1' => 'uploads/_cgL-CMy7JVHxds.jpg', 
     'photo2' => null, 
     'photo3' => 'uploads/_cgL-CMy7JVHxds.jpg', 
     'photo4' => null, 
     'photo5' => null, 
     'photo6' => 'uploads/_cgL-CMy7JVHxds.jpg', 
     'photo7' => null, 
     'photo8' => null, 
     'photo9' => null, 
     'photo10' => null, 
     'photo11' => null, 
     'photo12' => null, 
     'photo13' => null, 
     'photo14' => null, 
     'photo15' => null, 
     'photo16' => null, 
     'photo17' => null, 
     'photo18' => null, 
     'photo19' => null, 
     'photo20' => null, 
    ], 
]; 

foreach ($var as $key => $photos) { 
    foreach ($photos as $photoId => $path) { 
     if (empty($path)) { 
      unset ($var[$key][$photoId]); 
     } 
    } 
} 
var_dump($var); 

Answer 2

你不需要那麼 有

array_filter() 

這將取消設置你的陣列manual

Answer 3

print_r(array_filter($photo));