可能重复:
php: sort and count instances of words in a given string
我希望编写一个php函数,它将一个字符串作为输入,将其拆分为单词,然后返回按每个单词出现频率排序的单词数组。
实现此目的的算法效率最高的方法是什么?
答案 0 :(得分:24)
你最好的选择是:
str_word_count
— Return information about words used in a string array_count_values
— Counts all the values of an array 实施例
$words = 'A string with certain words occuring more often than other words.';
print_r( array_count_values(str_word_count($words, 1)) );
输出
Array
(
[A] => 1
[string] => 1
[with] => 1
[certain] => 1
[words] => 2
[occuring] => 1
[more] => 1
[often] => 1
[than] => 1
[other] => 1
)
标记CW,因为问题是至少包含相同答案的其他两个问题的重复