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word_table.php

<!DOCTYPE html>


<!--	word_table.php

        Uses a function to split a given string of text into

        its constituant words. It also determines the frequency of

        occurrence of each word. The words are separated by whitespace

        or punctuation, possibly followed by whitespace. The

        punctuation can be a period, a comma, a semicolon, a colon,

        an exclamation point, or a questionmark.

        The main driver program calls the function and displays

        the results.

	-->

<html lang = "en">

  <head>
    <title> word_table.php </title>
    <meta charset = "utf-8" />

</head>

  <body>

  <?php


// Function splitter

//  Parameter: a string of text containing words and punctuation

//  Returns: an array in which the unique words of the string are

//           the keys and their frequencies are the values.


  function splitter($str) {


// Create the empty word frequency array


    $freq = array();


// Split the parameter string into words


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


// Loop to count the words (either increment or initialize to 1)


    foreach ($words as $word) {

      $keys = array_keys($freq);

      if(in_array($word, $keys))

        $freq[$word]++;

      else

        $freq[$word] = 1;

    }


    return $freq;

  } #** End of splitter


// Main test driver


  $str = "apples are good for you, or don't you like apples?

          or maybe you like oranges better than apples";


// Call splitter


  $tbl = splitter($str);


// Display the words and their frequencies


  print "<br /> Word Frequency <br /><br />";

  $sorted_keys = array_keys($tbl);

  sort($sorted_keys);

  foreach ($sorted_keys as $word)

    print "$word $tbl[$word] <br />";

  ?>

  </body>

</html>