一个更好的 php array_merge [英] A better php array_merge

问题描述

我正在寻找一种更好的方法，而无需对 $justPrices[$i] 的整数进行硬编码:

I am looking to do this a better way without the need to hardcode the integers for $justPrices[$i]:

$pricesResult = array_merge($justPrices[0], $justPrices[1], $justPrices[2], $justPrices[3]);

$justPrices 是一个多维数组，每个数组中包含 4 个价格波段".$justPrices 的数据例如:

$justPrices is a multidimensional array, containing 4 'bands' of prices within each array. The data for $justPrices being for example:

Array ( [0] => Array ( [0] => 40.95 [1] => 39.95 [2] => 39.45 [3] => 38.95 ) [1] => Array ( [0] => 45.80 [1] => 41.80 [2] => 41.50 [3] => 41.40 ) [2] => Array ( [0] => 45.95 [1] => 42.95 [2] => 41.95 [3] => 41.45 ) [3] => Array ( [0] => 50.00 [1] => 50.00 [2] => 50.00 [3] => 50.00 ) )

问题在于 $justPrices 中的数组数量至少会从 2 到 10+ 不等.所以我需要一种方法让 array_merge() 函数的参数根据 $justPrices 中的数组数量而变化.我打算使用这个简单的方法来获取 $justPrices 中数组的数量:

The issue is that the amount of arrays within $justPrices will vary from at least 2 to 10+. So I need a way for the parameters for the array_merge() function to vary dependent on the amount of arrays within $justPrices. I was going to use this simple method to get the amount of arrays within $justPrices:

$justPricesMax = count($justPrices);

我可以写一个 for 循环，我可能仍然如此，我只是想知道是否有更好的方法来处理表面上看起来相对简单的事情！

I could write a for loop, and I might still, I just wondered if there was a better method for what seems on the surface relatively simple!

推荐答案

如果你只是想扁平化数组，可以使用 call_user_func_array 以$justPrices 的元素为参数调用array_merge:

If you just want to flatten the array, you can use call_user_func_array to call array_merge with the elements of $justPrices as parameters:

$flat = call_user_func_array('array_merge', $justPrices);

这相当于一个函数调用:

This is equivalent to a the function call:

$flat = array_merge($justPrices[0], $justPrices[1], … , $justPrices[count($justPrices)-1]);

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