PHP str_replace 用数组中的随机替换来替换需要？

Question

我已经研究过并且需要找到用一系列随机可能性替换需求的最佳方法。

即:

$text = "Welcome to [city]. I want [city] to be a random version each time. [city] should not be the same [city] each time.";

$keyword = "[city]";
$values = array("Orlando", "Dallas", "Atlanta", "Detroit", "Tampa", "Miami");

$result = str_replace("[$keyword]", $values, $text);

结果是每个事件都有城市的“Array”。我需要用 $values 中的随机数替换所有出现的城市。我想以最干净的方式做到这一点。到目前为止，我的解决方案很糟糕(递归)。最好的解决方案是什么？谢谢!

Answer 1

您可以使用 preg_replace_callback为每个匹配项执行一个函数并返回替换字符串:

$text = "Welcome to [city]. I want [city] to be a random version each time. [city] should not be the same [city] each time.";

$keyword = "[city]";
$values = array("Orlando", "Dallas", "Atlanta", "Detroit", "Tampa", "Miami");

$result = preg_replace_callback('/' . preg_quote($keyword) . '/', 
  function() use ($values){ return $values[array_rand($values)]; }, $text);

示例$result:

Welcome to Atlanta. I want Dallas to be a random version each time. Miami should not be the same Atlanta each time.