[英]PHP text shuffling and all possible options
Say I have a text string: {a|b|c|d} {a|b|c|d} {a|b|c|d} {a|b|c|d}
. 假设我有一个文本字符串: {a|b|c|d} {a|b|c|d} {a|b|c|d} {a|b|c|d}
。
And simple PHP function to shuffle the text: 和简单的PHP函数可以将文本随机播放:
function fb_filter_shuffle($string)
{
if(empty($string))
{
return NULL;
}
return preg_replace_callback('/\{.*?\}/i', function($m)
{
$options = explode('|', mb_substr($m[0], 1, -1));
shuffle($options);
return current($options);
}, $string);
}
I need to get all possible variations of the output. 我需要获取所有可能的输出变化。 But how? 但是如何? the only option I came up so far, was to run the code nnn
times and pick the unique options. 到目前为止,我nnn
的唯一选择是运行代码nnn
次并选择唯一的选项。 Any more efficient suggestions? 还有更有效的建议吗?
30 seconds with Google and look what I came up with ;) 与Google一起30秒,看看我想出了什么;)
http://docstore.mik.ua/orelly/webprog/pcook/ch04_25.htm http://docstore.mik.ua/orelly/webprog/pcook/ch04_25.htm
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