如何从php中的多维数组中获取随机元素

I have a multidimensional array composed originally from post variables that looks something like this:

我有一个多维数组，最初由post变量组成，看起来像这样：

$easys = array(
array($easy1min,$easy1max,$easy1enc),
array($easy2min,$easy2max,$easy2enc),
array($easy3min,$easy3max,$easy3enc),
array($easy4min,$easy4max,$easy4enc),
array($easy5min,$easy5max,$easy5enc),
array($easy6min,$easy6max,$easy6enc),
array($easy7min,$easy7max,$easy7enc),
array($easy8min,$easy8max,$easy8enc),
array($easy9min,$easy9max,$easy9enc),
array($easy10min,$easy10max,$easy10enc)
);

I'm attempting to return one randomized result from this.

我试图从中返回一个随机结果。

My function trying shuffle looks like this:

我的函数尝试shuffle看起来像这样：

$shuffle($easy_encounters);
$num = rand($easy_encounters[0][0],$easy_encounters[0][1]);
return "(".$num.") ".$easy_encounters[0][2];

gives

给

"shuffle expect parameter 1 to be array.."

“shuffle期望参数1为数组..”

I have also tried iterator_to_array:

我也试过iterator_to_array：

$easy_encounters = iterator_to_array($easy_encounters);

which returns error

返回错误

"Catchable fatal error: Argument 1 passed to iterator_to_array() must implement interface Traversable..."

“可捕获的致命错误：传递给iterator_to_array（）的参数1必须实现Traversable接口......”

then a couple attempts using various syntaxes for array_rand such as:

然后有几次尝试使用array_rand的各种语法，例如：

$easy_encounters = array_rand($easy_encounters);
$num = rand($easy_encounters [0][0],$easy_encounters [0][1]);
return "(".$num.") ".$easy_encounters [0][2];

and

和

$random_obj = $easy_encounters[array_rand($easy_encounters)];
$num = rand($random_obj[0][0],$random_obj[0][1]);
return "(".$num.") ".$random_obj[0][2];

I feel like I'm hitting all around this. I admit perhaps not fully understanding the useage of iterator_to_array after I got that Traversable error.

我觉得我正在打这个。我承认在得到Traversable错误后可能还没有完全理解iterator_to_array的用法。

Any help is appreciated. I've trudged around SO which is where I've gotten the examples i've used thusfar.

任何帮助表示赞赏。我已经在SO周围跋涉，这就是我已经得到了我用过的例子。

2 个解决方案

#1

$randomArray = array_rand($easy_encounters); 
echo $easy_encounters[$randomArray][array_rand($easy_encounters[$randomArray])];

First get a random array. Then get a random value from the array.

首先得到一个随机数组。然后从数组中获取一个随机值。

$randomArray is a random array inside of $easy_encounters. So the bottom line reads echo $easy_encounters[$randomArray][$randomElement inside $randomArray].

$ randomArray是$ easy_encounters中的随机数组。所以底线读取$ $ easy_encounters [$ randomArray] [$ randomElement里面$ randomArray]。

#2

First I don't think you can use $shuffle(argument) is it a function not a variable, remove the $, second you used $easys in the first part of code and then $easy_encounters to shuffle it. Use the same variable name in both of them.

首先我不认为你可以使用$ shuffle（参数）它是一个函数而不是一个变量，删除$，第二个你在代码的第一部分使用$ easys然后$ easy_encounters来改变它。在它们中使用相同的变量名称。

#1

$randomArray = array_rand($easy_encounters); 
echo $easy_encounters[$randomArray][array_rand($easy_encounters[$randomArray])];