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--- eg-259:lecture17 [2011/03/25 11:53] – eechris
+++ eg-259:lecture17 [2013/03/06 19:22] – [Introduction to PHP (Part 2)] eechris
@@ Line 4: / Line 4: @@
 ====== Introduction to PHP (Part 2) ======
-**Lecture 17**: To be given on Tuesday 24th November, 2008.
+**Contact Hour 22**: To be discussed on Wednesday 20th March, 2013.
 **Lecturer**: [[C.P.Jobling@Swansea.ac.uk|Dr Chris P. Jobling]].
@@ Line 280: / Line 280: @@
    * //Code//:
 <code php>
-<?php echo("<?xml version=\"1.0\" encoding=\"utf-8\"?>\n"); ?>
+<<!DOCTYPE html>
-<!DOCTYPE html PUBLIC "-//w3c//DTD XHTML 1.1//EN"
-         "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
 <!-- sorting.php - An example to illustrate several of the
      sorting functions -->
-<html xmlns = "http://www.w3.org/1999/xhtml" xml:lang="en">
+<html lang="en">
-  <head> <title> Sorting </title>
+  <head>
+    <meta charset="utf-8" />
+    <title> sorting.php - An example to illustrate several of the
+     sorting functions </title>
   </head>
   <body>
@@ Line 430: / Line 431: @@
   * //Code//:
 <code php>
-<?php echo("<?xml version=\"1.0\" encoding=\"utf-8\"?>\n"); ?>
+<!DOCTYPE html>
-<!DOCTYPE html PUBLIC "-//w3c//DTD XHTML 1.1 //EN"
- "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
 <!--    word_table.php
-        Uses a function to split a given string of text into
+Uses a function to split a given string of text into
-        its constituent words. It also determines the frequency of
+its constituent words. It also determines the frequency of
-        occurrence of each word. The words are separated by
+occurrence of each word. The words are separated by
-        whitespace or punctuation, possibly followed by whitespace.
+whitespace or punctuation, possibly followed by whitespace.
-        The punctuation can be a period, a comma, a semicolon, a
+The punctuation can be a period, a comma, a semicolon, a
-        colon, an exclamation point, or a question mark.
+colon, an exclamation point, or a question mark.
-        The main driver program calls the function and displays
+The main driver program calls the function and displays
-        the results.
+the results.
-        -->
+-->
-<html xmlns = "http://www.w3.org/1999/xhtml" xml:lang="en">
+<html lang="en">
-<head> <title> word_table.php </title>
+  <head>
-</head>
+    <meta charset="utf-8" />
-<body>
+    <title> Word Table </title>
-<?php
+  </head>
+  <body>
+    <?php
-// Function splitter
+    // Function splitter
-//  Parameter: a string of text containing words and punctuation
+    //  Parameter: a string of text containing words and punctuation
-//  Returns: an array in which the unique words of the string are
+    //  Returns: an array in which the unique words of the string are
-//           the keys and their frequencies are the values.
+    //           the keys and their frequencies are the values.
-function splitter($str) {
+    function splitter($str) {
-// Create the empty word frequency array
+      // Create the empty word frequency array
-  $freq = array();
+      $freq = array();
-// Split the parameter string into words
+      // Split the parameter string into words
-  $words = preg_split("/[ .,;:!?]\s*/", $str);
+      $words = preg_split("/[ .,;:!?]\s*/", $str);
-// Loop to count the words (either increment or initialize to 1)
+      // Loop to count the words (either increment or initialize to 1)
-  foreach ($words as $word) {
+      foreach ($words as $word) {
-    $keys = array_keys($freq);
+        $keys = array_keys($freq);
-    if(in_array($word, $keys))
+        if (in_array($word, $keys))
-      $freq[$word]++;
+          $freq[$word]++;
-    else
+        else
-      $freq[$word] = 1;
+          $freq[$word] = 1;
-  }
+      }
-  return $freq;
+      return $freq;
-} #** End of splitter
+    }#** End of splitter
-// Main test driver
+    // Main test driver
-  $str = "apples are good for you, or don't you like apples?
+    $str = "apples are good for you, or don't you like apples?
 or maybe you like oranges better than apples";
-// Call splitter
+    // Call splitter
-  $tbl = splitter($str);
+    $tbl = splitter($str);
-// Display the words and their frequencies
+    // Display the words and their frequencies
-  print "<br /> Word Frequency <br /><br />";
+    print "<br /> Word Frequency <br /><br />";
-  $sorted_keys = array_keys($tbl);
+    $sorted_keys = array_keys($tbl);
-  sort($sorted_keys);
+    sort($sorted_keys);
-  foreach ($sorted_keys as $word) {
+    foreach ($sorted_keys as $word) {
-    print "$word $tbl[$word] <br />";
+      print "$word $tbl[$word] <br />";
-  }
+    }
-?>
+  ?>
-</body>
+  </body>
 </html>
 </code>