数组键上的模式匹配 [英] Pattern Match on a Array Key

问题描述

我需要从这个数组中获取股票价值:

I need to get the stock values out of this array:

Array ( 
[stock0] => 1
[stockdate0] => 
[stock1] => 3 
[stockdate1] => apple 
[stock2] => 2 [
stockdate2] => 
) 

我需要对该数组进行模式匹配，其中数组键 = "stock" + 1 个通配符.我曾尝试使用数组过滤器函数来获取 PHP 手册上的所有其他值，但是空值似乎把它扔掉了.我尝试了很多我发现的不同的东西，但没有任何效果.

I need to pattern match on this array, where the array key = "stock" + 1 wildcard character. I have tried using the array filter function to get every other value on the PHP manual but the empty values seem to throw it out. I tried alot of different things I found but nothing is working.

这能做到吗?

推荐答案

array_filter 无法访问密钥，因此不是适合您工作的工具.

array_filter does not have access to the key and therefore is not the right tool for your job.

我相信你想要做的是:

$stocks = Array ( 
"stock0" => 1,
"stockdate0" => '',
"stock1" => 3, 
"stockdate1" => 'apple',
"stock2" => 2,
"stockdate2" => ''
);


$stockList = array();  //Your list of "stocks" indexed by the number found at the end of "stock"

foreach ($stocks as $stockKey => $stock)
{
  sscanf($stockKey,"stock%d", &stockId);  // scan into a formatted string and return values passed by reference
  if ($stockId !== false)
     $stockList[$stockId] = $stock;
}

现在 $stockList 看起来像这样:

Now $stockList looks like this:

Array ( 
[0] => 1
[1] => 3 
[2] => 2 
)

您可能需要大惊小怪，但我认为这就是您要的.

You may need to fuss with it a bit, but I think this is what you are asking for.

但是，如果您可以选择这样做，您确实应该遵循 Jeff Ober 的建议.

HOWEVER, you really should be following Jeff Ober's advice if you have the option to do so.

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