为什么php函数str_word_count（）从js等效返回不同的计数？

Question

I have this JS code which I think is equivalent to the PHP str_word_count() function, but still they return different words counts.

My JS code:

//element f9 value  is:
"Yes, for all people asking ? ? ? their selfs Have you ever dreamed to 
visite World Travel Market 2015 ? we can confirm that now it is a great
 time to go to London for World Travel Market 2015Yes, for all people 
asking their selfs Have you ever dreamed to visite World Travel Market 2015 ? 
we can confirm that now it is a great time to go to London for World 
Travel Market 2015Yes, for all people asking their selfs Have you ever 
dreamed to visite World Travel Market 2015 ? we can confirm that now it is
 a great time to go to London for World 2015Yes, for all people asking
 their selfs Have you ever dreamed to visite World 2015 we can confirm that 
now it is a great time to go to London for World Travel Market 2015Yes, for 
all people asking their selfs Have you ever dreamed to visite World Travel 
Market 2015 ? we can confirm that now it is a great time to go to London 
for World 2015Yes, for all people asking their selfs Have you ever dreamed 
to visite World Travel Market 2015 ? we can confirm that now it is a great 
time to go to London for World Travel Market 2015Yes, for all people asking 
their selfs Have you ever dreamed to visite World 2015 we can confirm that 
now it is a great time to go to London for World 2015Yes, for all people 
asking their selfs Have you ever dreamed to visite World Travel Market 
2015 ? we can confirm that now it is a great time to go to London for World 
2015Yes, for all people asking their selfs Have you ever dreamed to visite 
World 2015 ? we can confirm that now it is a great time to go to London for 
World 2015"


var words = document.getElementById("f9").value.replace(/([(\\\.\+\*\?\[\^\]\$\(\)\{\}\=\!<>\|\:])/g, '');
words = words.replace(/(^\s*)|(\s*$)/gi,"");
words = words.replace(/[ ]{2,}/gi," ");
words = words.replace(/
 /,"
");
words = words.split(' ').length;

outputs: 300

My PHP code:

str_word_count("Yes, for all people asking ? ? ? their selfs Have you ever dreamed to 
visite World Travel Market 2015 ? we can confirm that now it is a great
 time to go to London for World Travel Market 2015Yes, for all people 
asking their selfs Have you ever dreamed to visite World Travel Market 2015 ? 
we can confirm that now it is a great time to go to London for World 
Travel Market 2015Yes, for all people asking their selfs Have you ever 
dreamed to visite World Travel Market 2015 ? we can confirm that now it is
 a great time to go to London for World 2015Yes, for all people asking
 their selfs Have you ever dreamed to visite World 2015 we can confirm that 
now it is a great time to go to London for World Travel Market 2015Yes, for 
all people asking their selfs Have you ever dreamed to visite World Travel 
Market 2015 ? we can confirm that now it is a great time to go to London 
for World 2015Yes, for all people asking their selfs Have you ever dreamed 
to visite World Travel Market 2015 ? we can confirm that now it is a great 
time to go to London for World Travel Market 2015Yes, for all people asking 
their selfs Have you ever dreamed to visite World 2015 we can confirm that 
now it is a great time to go to London for World 2015Yes, for all people 
asking their selfs Have you ever dreamed to visite World Travel Market 
2015 ? we can confirm that now it is a great time to go to London for World 
2015Yes, for all people asking their selfs Have you ever dreamed to visite 
World 2015 ? we can confirm that now it is a great time to go to London for 
World 2015") 

outputs: 290

What does the PHP str_word_count() doesn't count as word, which my JS code does? Also can you suggest what to change so I can get same count for JS and PHP code?

Answer 1

As PHP manual for str_word_count says:

For the purpose of this function, 'word' is defined as a locale dependent string containing alphabetic characters, which also may contain, but not start with ' and - characters.

So integers are not counted as words. You have ten occurances of 2015 surrounded by spaces. If it's instantly followed with letters, it will still count them, for example: 2015Yes.

You may want to read this question to also count numbers in PHP.

OR

remove numbers in JS.

words = words.replace(/[0-9]/gi,"");

As @Rizier123 pointed out, you can see all words with this:

print_r(str_word_count($string, 1));