如何从字符串中提取＃标签？

Question

我想从一个字符串中提取所有＃个单词，例如，如果我有这个字符串：

P

我需要一个PHP函数，将这些返回给我：

using FuncType = void(int);

// These two declarations are exactly the same
void doAThing(FuncType* callback);
void doAThing(void(*callback)(int));

Answer 1

这是我应用您的请求的示例

$string = "Hello #people how are you doing #today I am in #asia and weather is super #nice";
$regex = '~(#\w+)~';
if (preg_match_all($regex, $string, $matches, PREG_PATTERN_ORDER)) {
   foreach ($matches[1] as $word) {
      echo $word .'<br/>';
   }
}