计算所有单词,包括php字符串中的数字

为了计算php字符串中的单词,通常我们可以使用str_word_count,但我认为并不总是一个好的解决方案

好例子：

$var ="Hello world!";
echo str_word_count($str);
print_r(str_word_count($str,1));

– >输出

2
   Array ( [0] => Hello [1] => world )

坏例子：

$var ="The example number 2 is a bad example it will not 
count numbers  and punctuations !!";

– >输出：

14
  Array ( [0] => The [1] => example [2] => number [3] => is [4] => a
  [5] => bad [6] => example [7] => it [8] => will [9] => not 
  [10] => count [11] => numbers [12] => and [13] => punctuations )

是否有一个很好的预定义函数来正确执行此操作,还是必须使用preg_match()？

$res = preg_split('/\s+/',$input);
$count = count($res);

"The example number 2 is a bad example it will not 
count numbers  and punctuations !!"