PHP：将数组中的所有值设置为某物
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PHP: set all values in an array to something
提问by Martin
Hi want to ask if there is a way to do this without foreach ($array as $k=>$v). I know it will work but I'm looking for a more elegant way if you know. So my array was like:
你好想问一下是否有办法在没有 foreach ($array as $k=>$v) 的情况下做到这一点。我知道它会起作用，但如果你知道，我正在寻找一种更优雅的方式。所以我的数组是这样的：
1 = 231
2 = 432
3 = 324
I flipped it and it became: 231 => 1, 432 =>2, 324 => 3. Now what I need to do is to set all values to '1'
我翻转它，它变成了：231 => 1, 432 =>2, 324 => 3。现在我需要做的是将所有值设置为'1'
回答by Rocket Hazmat
You can use array_fill_keys:
您可以使用array_fill_keys：
$array = array(
1 => 231,
2 => 432,
3 => 324
);
$array = array_flip($array);
$array = array_fill_keys(array_keys($array), 1);
回答by acme
array_fill_keys()should be what you need:
array_fill_keys()应该是你需要的：
$keys = array_keys($yourArray);
$filled = array_fill_keys($keys, 1);
回答by MortalViews
For PHP >5.3you can use anonymous functions.
对于PHP > 5.3，您可以使用匿名函数。
array_walk($array,function(&$value){$value=1;});
array_walk($array,function(&$value){$value=1;});
Note: value is passed by reference.
注意：值是通过引用传递的。
回答by Xunnamius
I believe you're looking for this function: array_fill()
我相信你正在寻找这个函数：array_fill()
From the above link:
从上面的链接：
"Fills an array with num entries of the value of the value parameter, keys starting at the start_index parameter."
“用 value 参数值的 num 个条目填充数组，键从 start_index 参数开始。”
Although if your indices are not numerical and/or are not enumerable (say, from 231 to 324 inclusive), then you may be better off with, as Rocket says, array_fill_keys()or your regular foreach.
尽管如果您的索引不是数字和/或不可枚举（例如，从 231 到 324 包括在内），那么正如 Rocket 所说，使用array_fill_keys()或您的常规 foreach可能会更好。
回答by Pere Hernández
I got at this post with the same question but I ended up getting another aproach.
我在这篇文章中提出了同样的问题，但我最终得到了另一种方法。
Why using array_flip + array_keys instead of simply use array_values?
为什么使用 array_flip + array_keys 而不是简单地使用 array_values？
$array = array(
1 => 231,
2 => 432,
3 => 324
);
$array = array_fill_keys(array_values($array), 1);
回答by user2573099
array_replace(array_flip($columns), array_fill_keys($columns, 0));
回答by Scotch
Any method that you call, such as array_map or fill_keys would still be using a loop to iterate over the array. It seems like you would want something such as array_map, which can be found here
您调用的任何方法（例如 array_map 或 fill_keys）仍将使用循环来迭代数组。似乎您想要诸如array_map之类的东西，可以在这里找到
If you consider that to be more elegant, to each his own:)
如果你认为这样更优雅，每个人都有自己的:)
