PHP 从循环生成数组（）？
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PHP Generate Array() from loop?
提问by kr1zmo
I just wrote this up, is this the most efficient way to add arrays to a preexisting array.
我刚刚写了这个，这是将数组添加到预先存在的数组的最有效方法。
$c=4;
$i=1;
$myarray = array();
while($i <= $c):
array_push($myarray, array('key' => 'value'));
$i++;
endwhile;
echo '<pre><code>';
var_dump($myarray);
echo '</code></pre>';
Update:How would you push the key & value, without creating a new array.
so this array_push($myarray,'key' => 'value');
not this array_push($myarray, array('key' => 'value'));
更新：如何在不创建新数组的情况下推送键和值。
所以这array_push($myarray,'key' => 'value');
不是这个array_push($myarray, array('key' => 'value'));
回答by markus
Your code has a couple of things which can be improved:
您的代码有一些可以改进的地方：
Magic Numbers
幻数
It's a bad practice to assign magic numbers like 4 and 1, use constants instead. For this example it's of course overkill but still important to know and use.
分配像 4 和 1 这样的幻数是一种不好的做法，而是使用常量。对于这个例子，它当然是矫枉过正，但了解和使用仍然很重要。
Lack of braces
缺少大括号
Always use the curly braces, it makes the code more readable.
始终使用大括号，它使代码更具可读性。
Wrong use of while loop
错误使用while循环
This is not a case for a while loop, if you want to loop a certain number of times, always use a for loop!
这不是while循环的情况，如果要循环一定次数，请始终使用for循环！
Unnessesary use of array_push
不必要地使用 array_push
You don't need array push to add elements to an array, you can and should probably use the shorthand function.
您不需要数组推送来向数组添加元素，您可以并且应该使用速记函数。
Result:
结果：
define('START', 1);
define('END', 4);
$myArray = array();
for ($i = START; $i < END; $i++)
{
$myArray[] = array('item' => '1 items');
}
回答by Prisoner
回答by NikiC
If you really need to only put a certain value n times into an array starting from a certain index, you could just use array_fill:
如果您真的只需要将某个值 n 次放入从某个索引开始的数组中，您可以使用array_fill：
$myarray = array_fill($i, $c, array('item' => '1 items'));
回答by mhitza
Your example looks fine to me, although you would most probably replace your array_pushfunction call with:
您的示例对我来说看起来不错，尽管您很可能会将array_push函数调用替换为：
$myarray[] = array('item' => '1 items');
Which "is" a shorthand syntax for array_push.
其中“是”array_push 的简写语法。
Update:For an associative array you just do:
更新：对于关联数组，您只需执行以下操作：
$myarray["item"] = "1 items";
Although with your example you'll just overwrite the value on each iteration.
尽管在您的示例中，您只会覆盖每次迭代的值。
回答by omkar salunkhe
for($i=1; $i < 10; $i++) {
$option[$i] = $i;
}
