Count word frequency in a text?

YD8877 picture YD8877 · Jan 12, 2011 · Viewed 19.8k times · Source

Possible Duplicate:
php: sort and count instances of words in a given string

I am looking to write a php function which takes a string as input, splits it into words and then returns an array of words sorted by the frequency of occurence of each word.

What's the most algorithmically efficient way of accomplishing this ?

Answer

Gordon picture Gordon · Jan 12, 2011

Your best bet are these:

Example

$words = 'A string with certain words occuring more often than other words.';
print_r( array_count_values(str_word_count($words, 1)) );

Output

Array
(
    [A] => 1
    [string] => 1
    [with] => 1
    [certain] => 1
    [words] => 2
    [occuring] => 1
    [more] => 1
    [often] => 1
    [than] => 1
    [other] => 1
)

marking CW because question is a duplicate of at least two other questions containing the same answer