如何在php的段落中查找具有相同长度的单词？

Question

这是我的段落：

$string = "A country is a region legally identified as a distinct entity in political geography.

我尝试过

$word = str_word_count($string); but it returns number of words only.     

现在我想计算长度为2的字母数。在给定的字符串中，它们是3个单词，其字母数为2。

在PHP中怎么可能？ 请帮我找出解决方案？

Answer 1

你可以这样

<?php
$string = "A country is a region legally identified as a distinct entity in political geography.";
$arr = explode(' ',$string);
foreach($arr as $val)
{
    if(strlen($val)==2)
    {
        echo "$val has a length of 2.<br>";
    }
}

OUTPUT :

is has a length of 2.
as has a length of 2.
in has a length of 2.