PHP: 3 Most Common Words

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This is a class assignment that I am working on and not understanding completely. Just would like some help in the right direction.

Directons:
Parameter: A string containing words that are delimited on the left with spaces and on the right with spaces, commas, periods, or question marks
Return value: The three most common words in the string that have more than

PHP

<?php
          function splitter($str) {
                $freq = array();

                $words = preg_split("/[\.,;:!\/]\s*/", $str);

                foreach ($words as $word) {
                    $keys = array_keys($freq);
                    if(in_array($word, $keys))
                    $freq[$word]++;
                    else
                    $freq[$word] = 1;
                }
                return $freq;
            }

            $str = "I like to run or jog for exercise. Then, I like to drink plenty of fluids.";

            $result = splitter($str);
            sort($result);
            foreach ($result as $word) {
                $len = strlen($word);
                if ($len > 3)
                print $word;
                else
                return false;
            }

        ?>

This code returns nothing. I have tried a few variations and just lost at this point.

Posted 25-Jul-13 9:47am

tristarterror

Updated 25-Jul-13 10:37am

Matt T Heffron

v2

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Sergey Alexandrovich Kryukov 25-Jul-13 15:57pm

Don't you think you just need to pay a bit more effort? Do you have an opportunity to run the code under the debugger? Do you have any particular concern?
—SA

Member 12070401 19-Oct-15 10:34am

Can you please post final program for this question??

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This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Sergey Alexandrovich Kryukov · Accepted Answer · 2013-07-25T10:16:00

I would advise to use Regular expressions instead: http://webcheatsheet.com/php/regular_expressions.php[^].

Find all matches each representing a word, and rewrite all the words in a frequency dictionary, so each word would be represented only once, and the value represents the frequency. The keys should be the strings, each representing a word. In PHP, this is easily done with array, because a PHP array is actually an associative container. You should index array with your words and elements should represent frequencies:
http://php.net/manual/en/language.types.array.php[^].

Now, you scan all Regex matches, get all the words one by one and add to array. If the key does not yet exist, you just add new word with the frequency value of 1, if it does exist, you access existing array element and increment the frequency. At the end, you will have the array with all the words and their frequencies. I hope the search for top 3 you can design by yourself.

—SA

PHP: 3 Most Common Words

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PHP: 3 Most Common Words

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