更好的 php array_merge
我正在寻找一种更好的方法，而不需要对 $justPrices[$i] 的整数进行硬编码：
$pricesResult = array_merge($justPrices[0], $justPrices[1], $justPrices[2], $justPrices[3]);
$justPrices 是一个多维数组，包含 4 个“bands”每个数组中的价格。例如，$justPrices 的数据如下：
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 ) )
问题是 $justPrices 中的数组数量至少会在 2 到 10+ 之间变化。因此，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 中的数组数量：
$justPricesMax = count($justPrices);
我可以编写一个 for 循环，而且我仍然可以，我只是想知道是否有一个更好的方法，表面上看起来相对简单！
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 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 ) )
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);
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!
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如果你只是想展平数组，可以使用
call_user_func_array来调用array_merge以$justPrices的元素作为参数：这相当于函数调用：
If you just want to flatten the array, you can use
call_user_func_arrayto callarray_mergewith the elements of$justPricesas parameters:This is equivalent to a the function call: