PHP 从两个字符串中选择一个随机字符串
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PHP Select a Random String from Two Strings
提问by TheBlackBenzKid
$apple="";
$banana="";
$apple="Red";
$banana="Blue";
$random(rand($apple, $banana);
echo $random;
How can I select a random string (fast) via PHP?
如何通过 PHP 选择随机字符串（快速）？
回答by Razvan Grigore
What about:
关于什么：
$random = rand(0, 1) ? 'Red' : 'Blue';
回答by Treffynnon
Issue with your code
你的代码有问题
The PHP rand()function takes two numbers as input to form the range to pick a random number from. You cannot feed it strings.
PHPrand()函数将两个数字作为输入以形成从中选择随机数的范围。你不能喂它字符串。
See the PHP manual page for rand().
Solutions
解决方案
You can use array_rand():
您可以使用array_rand()：
$strings = array(
'Red',
'Blue',
);
$key = array_rand($strings);
echo $strings[$key];
Another option is to use shuffle().
另一种选择是使用shuffle().
$strings = array(
'Red',
'Blue',
);
shuffle($strings);
echo reset($strings);
回答by Manse
Use an array :
使用数组：
$input = array("Red", "Blue", "Green");
echo $input[array_rand($input)];
回答by DaveRandom
array_rand()is probably the best way:
array_rand()可能是最好的方法：
$varNames = array('apple','banana');
$var = array_rand($varNames);
echo ${$varNames[$var]};
回答by OptimusCrime
The function rand()has two parameters: a lower-limit for a random number and an upper limit. You can not use variables like that because it is not the way the function works.
该函数rand()有两个参数：随机数的下限和上限。你不能使用这样的变量，因为它不是函数的工作方式。
Take a look at the documentation:
http://php.net/rand
看一下文档：http:
//php.net/rand
A simple way to achieve what you want is this:
实现您想要的一种简单方法是：
$array = array();
$array[0] = 'banana';
$array[1] = 'orange';
$randomSelected = $array[rand(0,(count($array)-1))];
As far as I've read, this solution is faster than array_rand(). I can see if I can find the source of that.
据我所知，这个解决方案比array_rand(). 我可以看看我能不能找到它的来源。
回答by Pete_1
Ran into this old question that tops google's results. You can have more than two options and still get it all on one line.
遇到了这个在谷歌搜索结果中排名第一的老问题。您可以有两个以上的选择，并且仍然可以在一行中获得所有选项。
echo ['green', 'blue', 'red'][rand(0,2)];
