到PHP数组动态访问 [英] Dynamic access to a PHP array

问题描述

我试着用 $这个 - ＆GT访问; $ arrDataName [$关键] 的关键元素上 $键从数组 $这个 - ＆GT; $ arrDataName 。但是PHP间preTES那个做错了。

I tried to access with $this->$arrDataName[$key] on the element with the key $key from the array $this->$arrDataName. But PHP interpretes that wrong.

我试了一下 {} 围绕 $ arrDataName 到 $这个 - ＆GT ; {$ arrDataName} [$键] ，但它不能正常工作

I tried it with { } around the $arrDataName to $this->{$arrDataName}[$key], but it doesn't work.

在php.net我发现了一个建议，但我没有意识到这一点。

On php.net I found an advice, but I can't realize it.

为了使用可变变量与数组，必须解决一个模棱两可的问题。也就是说，如果你写$$ a [1]，解析器需要知道，如果你想用一个$ [1]作为一个变量，或者如果你想$$ a作为变量，然后在[1]从指数该变量。解决这种模棱两可的语法为：$ {$ a [1]}对于第一种情况和$ {$ A} [1]第二个

In order to use variable variables with arrays, you have to resolve an ambiguity problem. That is, if you write $$a[1] then the parser needs to know if you meant to use $a[1] as a variable, or if you wanted $$a as the variable and then the [1] index from that variable. The syntax for resolving this ambiguity is: ${$a[1]} for the first case and ${$a}[1] for the second.

也许有人能帮助我。

谢谢！

编辑：

我认为这是行不通的，但我忘了，填补了数组。结果
最后，它的工作原理。 :)结果
这是解决方案： $这个 - ＆GT; {$ arrDataName} [$键]

I think it doesn't work, but I forgot to fill the array.
Finally it works. :)
This is the solution: $this->{$arrDataName}[$key]

推荐答案

您的语法是正确的：

$this->{$varName}[$key]

您也可以使用一个额外的变量此：

You can also use an extra variable for this:

$myTempArr = $this->$arrDataName;

$myTempArr[ $key ];

恕我直言，可读性更好的这样...

IMHO, readability is better that way...

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