可变变量不好用吗? [英] variable variables bad practice to use?

问题描述

我刚刚阅读了

I have just read the post is it bad practice to use variable variables in php in the following fashion? explaining why they are bad to use in with classes however, i have to create dynamic variables to be sorted

例如:

$array =
array(
 array("Line 1","Line 2","Line 3"),
 array("Line 1","Line 2","Line 3"),
 array("Line 1","Line 2","Line 3"),
)
$i = 1;
foreach($array as $item){
 $string = "Item".$i;
 $$string = $item[0]."some code".$item[1]."some code".$item[2]."some code";
}

我知道每个辅助数组中将永远只有3个数组值，并且只有3个数组.

i know that there will only ever be 3 array values in each secondary array and there will only ever be 3 arrays.

有没有一种方法可以使用更好的实践"代码来实现?还是我忽略的更简单的方法?

is there a way to achieve this using "better practice" code? or a simpler way which i have overlooked?

提前感谢您的时间

推荐答案

这应该很好:

$newArray = array_map(function (array $item) {
    return $item[0]."some code".$item[1]."some code".$item[2]."some code";
}, $array);

var_dump($newArray);

我根本看不到需要单独的变量的地方.

I don't see where separate variables are needed at all.

如果您只是连续动态地对变量编号($item1，$item2等)，则您试图保留动态数量的元素.这正是数组的用途:$items[0]，$items[1]等.

If you just continuously number variables dynamically ($item1, $item2 etc.), you're trying to hold a dynamic number of elements. That's exactly what arrays are for: $items[0], $items[1] etc.

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