Question

我为每个循环设置了一个插入值，以便将值插入到我创建的自定义数组中。出于某种原因，当我使用我设置的一个自定义键在阵列上运行for循环后，我没有得到任何结果。

每个循环中的我的数组

$posting_ids[] .= "[posting_id] => ".$value['posting_id'].", [posting_likes] => ".$value['total_likes']."";

在for循环中回显数组

for($a=0; $a < count($posting_ids); $a++) {
    echo $posting_ids['posting_id'];
}

我希望能够像下面的示例一样提取所有的posts_ids和posting_likes

Array (
  [0] => 
       [posting_id] => 1 
       [posting_likes] => 15 
  [1] => 
       [posting_id] => 2 
       [posting_likes] => 19 
)

填充此数组的结果是从foreach循环中提取的，因此它需要能够在数组中存储多个值。

Answer 1

选中此example，它可能会对您有所帮助。

<?php
  $posting_ids[0]['posting_id' ] = 1;
  $posting_ids[0]['total_likes'] = 10;

  $posting_ids[1]['posting_id' ] = 2;
  $posting_ids[1]['total_likes'] = 20;

  for($a=0; $a < count($posting_ids); $a++){
    echo $posting_ids[$a]['posting_id'];
  }

Answer 2

相反

$posting_ids[] .= "[posting_id] => ".$value['posting_id'].", [posting_likes] => ".$value['total_likes']."";

这样做 -

$posting_ids['posting_id'] = $value['posting_id'];
$posting_ids['posting_likes'] = $value['total_likes'];

编辑：根据您更新的帖子，您可以这样做

while() { //your loop
$posting_ids = array('posting_id' => $value['posting_id'],      'posting_likes'=>$value['total_likes']);
}

这样你打印$ post_id就会打印出

Array (
  [0] => 
       [posting_id] => 1 
       [posting_likes] => 15 
  [1] => 
       [posting_id] => 2 
       [posting_likes] => 19 
)

使用PHP在数组中创建自定义键

2 个答案: