Updated files

11/02.php

@@ -5,8 +5,8 @@
   {
     $pdo = new PDO($attr, $user, $pass, $opts);
   }
-  catch (\PDOException $e)
+  catch (PDOException $e)
   {
-    throw new \PDOException($e->getMessage(), (int)$e->getCode());
+    throw new PDOException($e->getMessage(), (int)$e->getCode());
   }
 ?>

11/04.php

@@ -5,9 +5,9 @@
   {
     $pdo = new PDO($attr, $user, $pass, $opts);
   }
-  catch (\PDOException $e)
+  catch (PDOException $e)
   {
-    throw new \PDOException($e->getMessage(), (int)$e->getCode());
+    throw new PDOException($e->getMessage(), (int)$e->getCode());
   }
 
   $query  = "SELECT * FROM classics";

11/05.php

@@ -5,9 +5,9 @@
   {
     $pdo = new PDO($attr, $user, $pass, $opts);
   }
-  catch (\PDOException $e)
+  catch (PDOException $e)
   {
-    throw new \PDOException($e->getMessage(), (int)$e->getCode());
+    throw new PDOException($e->getMessage(), (int)$e->getCode());
   }
 
   $query  = "SELECT * FROM classics";

11/06.php

@@ -5,9 +5,9 @@
   {
     $pdo = new PDO($attr, $user, $pass, $opts);
   }
-  catch (\PDOException $e)
+  catch (PDOException $e)
   {
-    throw new \PDOException($e->getMessage(), (int)$e->getCode());
+    throw new PDOException($e->getMessage(), (int)$e->getCode());
   }
 
   if (isset($_POST['delete']) && isset($_POST['isbn']))

11/07.php

@@ -5,9 +5,9 @@
   {
     $pdo = new PDO($attr, $user, $pass, $opts);
   }
-  catch (\PDOException $e)
+  catch (PDOException $e)
   {
-    throw new \PDOException($e->getMessage(), (int)$e->getCode());
+    throw new PDOException($e->getMessage(), (int)$e->getCode());
   }
 
   $query = "CREATE TABLE cats (

11/08.php

@@ -5,9 +5,9 @@
   {
     $pdo = new PDO($attr, $user, $pass, $opts);
   }
-  catch (\PDOException $e)
+  catch (PDOException $e)
   {
-    throw new \PDOException($e->getMessage(), (int)$e->getCode());
+    throw new PDOException($e->getMessage(), (int)$e->getCode());
   }
 
   $query  = "DESCRIBE cats";

11/09.php

@@ -5,9 +5,9 @@
   {
     $pdo = new PDO($attr, $user, $pass, $opts);
   }
-  catch (\PDOException $e)
+  catch (PDOException $e)
   {
-    throw new \PDOException($e->getMessage(), (int)$e->getCode());
+    throw new PDOException($e->getMessage(), (int)$e->getCode());
   }
 
   $query  = "DROP TABLE cats";

11/10.php

@@ -5,9 +5,9 @@
   {
     $pdo = new PDO($attr, $user, $pass, $opts);
   }
-  catch (\PDOException $e)
+  catch (PDOException $e)
   {
-    throw new \PDOException($e->getMessage(), (int)$e->getCode());
+    throw new PDOException($e->getMessage(), (int)$e->getCode());
   }
 
   $query  = "INSERT INTO cats VALUES(NULL, 'Lion', 'Leo', 4)";

11/11.php

@@ -5,9 +5,9 @@
   {
     $pdo = new PDO($attr, $user, $pass, $opts);
   }
-  catch (\PDOException $e)
+  catch (PDOException $e)
   {
-    throw new \PDOException($e->getMessage(), (int)$e->getCode());
+    throw new PDOException($e->getMessage(), (int)$e->getCode());
   }
 
   $query  = "SELECT * FROM cats";

11/12.php

@@ -5,9 +5,9 @@
   {
     $pdo = new PDO($attr, $user, $pass, $opts);
   }
-  catch (\PDOException $e)
+  catch (PDOException $e)
   {
-    throw new \PDOException($e->getMessage(), (int)$e->getCode());
+    throw new PDOException($e->getMessage(), (int)$e->getCode());
   }
 
   $query  = "UPDATE cats SET name='Charlie' WHERE name='Charly'";

11/13.php

@@ -5,9 +5,9 @@
   {
     $pdo = new PDO($attr, $user, $pass, $opts);
   }
-  catch (\PDOException $e)
+  catch (PDOException $e)
   {
-    throw new \PDOException($e->getMessage(), (int)$e->getCode());
+    throw new PDOException($e->getMessage(), (int)$e->getCode());
   }
 
   $query  = "DELETE FROM cats WHERE name='Growler'";

11/14.php

@@ -5,9 +5,9 @@
   {
     $pdo = new PDO($attr, $user, $pass, $opts);
   }
-  catch (\PDOException $e)
+  catch (PDOException $e)
   {
-    throw new \PDOException($e->getMessage(), (int)$e->getCode());
+    throw new PDOException($e->getMessage(), (int)$e->getCode());
   }
   
   $query  = "INSERT INTO cats VALUES(NULL, 'Lynx', 'Stumpy', 5)";

11/15.php

@@ -5,9 +5,9 @@
   {
     $pdo = new PDO($attr, $user, $pass, $opts);
   }
-  catch (\PDOException $e)
+  catch (PDOException $e)
   {
-    throw new \PDOException($e->getMessage(), (int)$e->getCode());
+    throw new PDOException($e->getMessage(), (int)$e->getCode());
   }
 
   $query  = "SELECT * FROM customers";

11/17.php

@@ -5,9 +5,9 @@
   {
     $pdo = new PDO($attr, $user, $pass, $opts);
   }
-  catch (\PDOException $e)
+  catch (PDOException $e)
   {
-    throw new \PDOException($e->getMessage(), (int)$e->getCode());
+    throw new PDOException($e->getMessage(), (int)$e->getCode());
   }
 
   $user  = mysql_fix_string($pdo, $_POST['user']);

11/19.php

@@ -5,9 +5,9 @@
   {
     $pdo = new PDO($attr, $user, $pass, $opts);
   }
-  catch (\PDOException $e)
+  catch (PDOException $e)
   {
-    throw new \PDOException($e->getMessage(), (int)$e->getCode());
+    throw new PDOException($e->getMessage(), (int)$e->getCode());
   }
 
   $stmt = $pdo->prepare('INSERT INTO classics VALUES(?,?,?,?,?)');

11/21.php

@@ -5,9 +5,9 @@
   {
     $pdo = new PDO($attr, $user, $pass, $opts);
   }
-  catch (\PDOException $e)
+  catch (PDOException $e)
   {
-    throw new \PDOException($e->getMessage(), (int)$e->getCode());
+    throw new PDOException($e->getMessage(), (int)$e->getCode());
   }
 
   $user  = mysql_entities_fix_string($pdo, $_POST['user']);

11/sqltest.php

@@ -5,9 +5,9 @@
   {
     $pdo = new PDO($attr, $user, $pass, $opts);
   }
-  catch (\PDOException $e)
+  catch (PDOException $e)
   {
-    throw new \PDOException($e->getMessage(), (int)$e->getCode());
+    throw new PDOException($e->getMessage(), (int)$e->getCode());
   }
 
   if (isset($_POST['delete']) && isset($_POST['isbn']))

15/03.html

@@ -1,4 +1,6 @@
 <script>
-  days_to_new_year = 366 - day_number;
+  day_number       = 127  // For example
+  days_to_new_year = 366 - day_number
   if (days_to_new_year < 30) document.write("It's nearly New Year")
+  else                       document.write("It's a long time to go")
 </script>

16/02.html

@@ -1,4 +1,8 @@
 <script>
+  let c = "Car"
+
+  displayItems("Bananas", 32.3, c)
+
   function displayItems()
   {
     for (j = 0 ; j < displayItems.arguments.length ; ++j)

17/adduser.php

@@ -0,0 +1,203 @@
+<?php // adduser.php
+
+  // Start with the PHP code
+
+  $forename = $surname = $username = $password = $age = $email = "";
+
+  if (isset($_POST['forename']))
+    $forename = fix_string($_POST['forename']);
+  if (isset($_POST['surname']))
+    $surname  = fix_string($_POST['surname']);
+  if (isset($_POST['username']))
+    $username = fix_string($_POST['username']);
+  if (isset($_POST['password']))
+    $password = fix_string($_POST['password']);
+  if (isset($_POST['age']))
+    $age      = fix_string($_POST['age']);
+  if (isset($_POST['email']))
+    $email    = fix_string($_POST['email']);
+
+  $fail  = validate_forename($forename);
+  $fail .= validate_surname($surname);
+  $fail .= validate_username($username);
+  $fail .= validate_password($password);
+  $fail .= validate_age($age);
+  $fail .= validate_email($email);
+
+  echo "<!DOCTYPE html>\n<html><head><title>An Example Form</title>";
+
+  if ($fail == "")
+  {
+    echo "</head><body>Form data successfully validated:
+      $forename, $surname, $username, $password, $age, $email.</body></html>";
+
+    // This is where you would enter the posted fields into a database,
+    // preferably using hash encryption for the password.
+
+	exit;
+  }
+
+  echo <<<_END
+
+    <!-- The HTML/JavaScript section -->
+
+    <style>
+      .signup {
+        border: 1px solid #999999;
+      font:   normal 14px helvetica; color:#444444;
+      }
+    </style>
+
+    <script>
+      function validate(form)
+      {
+        fail  = validateForename(form.forename.value)
+        fail += validateSurname(form.surname.value)
+        fail += validateUsername(form.username.value)
+        fail += validatePassword(form.password.value)
+        fail += validateAge(form.age.value)
+        fail += validateEmail(form.email.value)
+      
+        if (fail == "")     return true
+        else { alert(fail); return false }
+      }
+
+      function validateForename(field)
+      {
+        return (field == "") ? "No Forename was entered.\\n" : ""
+      }
+
+      function validateSurname(field)
+      {
+        return (field == "") ? "No Surname was entered.\\n" : ""
+      }
+
+      function validateUsername(field)
+      {
+        if (field == "") return "No Username was entered.\\n"
+        else if (field.length < 5)
+          return "Usernames must be at least 5 characters.\\n"
+        else if (/[^a-zA-Z0-9_-]/.test(field))
+          return "Only a-z, A-Z, 0-9, - and _ allowed in Usernames.\\n"
+        return ""
+      }
+
+      function validatePassword(field)
+      {
+        if (field == "") return "No Password was entered.\\n"
+        else if (field.length < 6)
+          return "Passwords must be at least 6 characters.\\n"
+        else if (!/[a-z]/.test(field) || ! /[A-Z]/.test(field) ||
+                 !/[0-9]/.test(field))
+          return "Passwords require one each of a-z, A-Z and 0-9.\\n"
+        return ""
+      }
+
+      function validateAge(field)
+      {
+        if (isNaN(field)) return "No Age was entered.\\n"
+        else if (field < 18 || field > 110)
+          return "Age must be between 18 and 110.\\n"
+        return ""
+      }
+
+      function validateEmail(field)
+      {
+        if (field == "") return "No Email was entered.\\n"
+          else if (!((field.indexOf(".") > 0) &&
+                     (field.indexOf("@") > 0)) ||
+                    /[^a-zA-Z0-9.@_-]/.test(field))
+            return "The Email address is invalid.\\n"
+        return ""
+      }
+    </script>
+  </head>
+  <body>
+
+    <table border="0" cellpadding="2" cellspacing="5" bgcolor="#eeeeee">
+      <th colspan="2" align="center">Signup Form</th>
+
+        <tr><td colspan="2">Sorry, the following errors were found<br>
+          in your form: <p><font color=red size=1><i>$fail</i></font></p>
+        </td></tr>
+
+      <form method="post" action="adduser.php" onSubmit="return validate(this)">
+        <tr><td>Forename</td>
+          <td><input type="text" maxlength="32" name="forename" value="$forename">
+        </td></tr><tr><td>Surname</td>
+          <td><input type="text" maxlength="32" name="surname"  value="$surname">
+        </td></tr><tr><td>Username</td>
+          <td><input type="text" maxlength="16" name="username" value="$username">
+        </td></tr><tr><td>Password</td>
+          <td><input type="text" maxlength="12" name="password" value="$password">
+        </td></tr><tr><td>Age</td>
+          <td><input type="text" maxlength="3"  name="age"      value="$age">
+        </td></tr><tr><td>Email</td>
+          <td><input type="text" maxlength="64" name="email"    value="$email">
+        </td></tr><tr><td colspan="2" align="center"><input type="submit"
+          value="Signup"></td></tr>
+      </form>
+    </table>
+  </body>
+</html>
+
+_END;
+
+  // The PHP functions
+
+  function validate_forename($field)
+  {
+  	return ($field == "") ? "No Forename was entered<br>": "";
+  }
+  
+  function validate_surname($field)
+  {
+  	return($field == "") ? "No Surname was entered<br>" : "";
+  }
+  
+  function validate_username($field)
+  {
+    if ($field == "") return "No Username was entered<br>";
+    else if (strlen($field) < 5)
+      return "Usernames must be at least 5 characters<br>";
+    else if (preg_match("/[^a-zA-Z0-9_-]/", $field))
+      return "Only letters, numbers, - and _ in usernames<br>";
+    return "";		
+  }
+  
+  function validate_password($field)
+  {
+    if ($field == "") return "No Password was entered<br>";
+    else if (strlen($field) < 6)
+      return "Passwords must be at least 6 characters<br>";
+    else if (!preg_match("/[a-z]/", $field) ||
+             !preg_match("/[A-Z]/", $field) ||
+             !preg_match("/[0-9]/", $field))
+      return "Passwords require 1 each of a-z, A-Z and 0-9<br>";
+    return "";
+  }
+  
+  function validate_age($field)
+  {
+    if ($field == "") return "No Age was entered<br>";
+    else if ($field < 18 || $field > 110)
+      return "Age must be between 18 and 110<br>";
+    return "";
+  }
+  
+  function validate_email($field)
+  {
+    if ($field == "") return "No Email was entered<br>";
+      else if (!((strpos($field, ".") > 0) &&
+                 (strpos($field, "@") > 0)) ||
+                  preg_match("/[^a-zA-Z0-9.@_-]/", $field))
+        return "The Email address is invalid<br>";
+    return "";
+  }
+  
+  function fix_string($string)
+  {
+    if (get_magic_quotes_gpc()) $string = stripslashes($string);
+    return htmlentities ($string);
+  }
+?>

18/02.html

@@ -8,58 +8,19 @@
     <div id='info'>This sentence will be replaced</div>
 
     <script>
-      params  = "url=news.com"
-      request = new asyncRequest()
+      let XHR = new XMLHttpRequest()
 
-      request.open("POST", "urlpost.php", true)
-      request.setRequestHeader("Content-type",
-        "application/x-www-form-urlencoded")
+      XHR.open("POST", "http://127.0.0.1/18/urlpost.php", true)
+      XHR.setRequestHeader("Content-type", "application/x-www-form-urlencoded")
+      XHR.send("url=news.com")
 
-      request.onreadystatechange = function()
+      XHR.onreadystatechange = function()
       {
-        if (this.readyState == 4)
+        if (this.readyState == 4 && this.status == 200)
         {
-          if (this.status == 200)
-          {
-            if (this.responseText != null)
-            {
-              document.getElementById('info').innerHTML =
-                this.responseText
-            }
-            else alert("Communication error: No data received")
-          }
-          else alert( "Communication error: " + this.statusText)
+          document.getElementById("info").innerHTML = this.responseText
         }
-      }
-
-      request.send(params)
-
-      function asyncRequest()
-      {
-        try
-        {
-          var request = new XMLHttpRequest()
-        }
-        catch(e1)
-        {
-          try
-          {
-            request = new ActiveXObject("Msxml2.XMLHTTP")
-          }
-          catch(e2)
-          {
-            try
-            {
-              request = new ActiveXObject("Microsoft.XMLHTTP")
-            }
-            catch(e3)
-            {
-              request = false
-            }
-          }
-        }
-        return request
-      }
+      }      
     </script>
   </body>
 </html>

18/04.html

@@ -8,55 +8,20 @@
     <div id='info'>This sentence will be replaced</div>
 
     <script>
-      nocache = "&nocache=" + Math.random() * 1000000
-      request = new asyncRequest()
-      request.open("GET", "urlget.php?url=news.com" + nocache, true)
+      let nocache = "&nocache=" + Math.random() * 1000000
+      let XHR     = new XMLHttpRequest()
 
-      request.onreadystatechange = function()
+      XHR.open("POST", "http://127.0.0.1/18/urlget.php?url=news.com" + nocache, true)
+      XHR.setRequestHeader("Content-type", "application/x-www-form-urlencoded")
+      XHR.send()
+
+      XHR.onreadystatechange = function()
       {
-        if (this.readyState == 4)
+        if (this.readyState == 4 && this.status == 200)
         {
-          if (this.status == 200)
-          {
-            if (this.responseText != null)
-            {
-              document.getElementById('info').innerHTML =
-                this.responseText
-            }
-            else alert("Communication error: No data received")
-          }
-          else alert( "Communication error: " + this.statusText)
+          document.getElementById("info").innerHTML = this.responseText
         }
-      }
-
-      request.send(null)
-
-      function asyncRequest()
-      {
-        try
-        {
-          var request = new XMLHttpRequest()
-        }
-        catch(e1)
-        {
-          try
-          {
-            request = new ActiveXObject("Msxml2.XMLHTTP")
-          }
-          catch(e2)
-          {
-            try
-            {
-              request = new ActiveXObject("Microsoft.XMLHTTP")
-            }
-            catch(e3)
-            {
-              request = false
-            }
-          }
-        }
-        return request
-      }
+      }      
     </script>
   </body>
 </html>

18/07.html

@@ -8,63 +8,28 @@
     <div id='info'>This sentence will be replaced</div>
   
     <script>
-      nocache = "&nocache=" + Math.random() * 1000000
-      url     = "rss.news.yahoo.com/rss/topstories"
-      out     = "";
+      let out     = ''
+      let nocache = "&nocache=" + Math.random() * 1000000
+      let url     = "rss.news.yahoo.com/rss/topstories"
+      let XHR     = new XMLHttpRequest()
+    
+      XHR.open("POST", "http://127.0.0.1/18/xmlget.php?url=" + url + nocache, true)
+      XHR.setRequestHeader("Content-type", "application/x-www-form-urlencoded")
+      XHR.send()
 
-      request = new asyncRequest()
-      request.open("GET", "xmlget.php?url=" + url + nocache, true)
-        
-      request.onreadystatechange = function()
+      XHR.onreadystatechange = function()
       {
-        if (this.readyState == 4)
+        if (this.readyState == 4 && this.status == 200)
         {
-          if (this.status == 200)
-          {
-            if (this.responseText != null)
-            {
-              titles = this.responseXML.getElementsByTagName('title')
+           let titles = this.responseXML.getElementsByTagName('title')
 
-              for (j = 0 ; j < titles.length ; ++j)
-              {
-                out += titles[j].childNodes[0].nodeValue + '<br>'
-              }
-              document.getElementById('info').innerHTML = out  
-            }
-            else alert("Communication error: No data received")
-          }
-          else alert( "Communication error: " + this.statusText)
+           for (let j = 0 ; j < titles.length ; ++j)
+           {
+             out += titles[j].childNodes[0].nodeValue + '<br>'
+           }
+           document.getElementById('info').innerHTML = out  
         }
-      }
-      
-      request.send(null)
-      
-      function asyncRequest()
-      {
-        try
-        {
-          var request = new XMLHttpRequest()
-        }
-        catch(e1)
-        {
-          try
-          {
-            request = new ActiveXObject("Msxml2.XMLHTTP")
-          }
-          catch(e2)
-          {
-            try
-            {
-              request = new ActiveXObject("Microsoft.XMLHTTP")
-            }
-            catch(e3)
-            {
-              request = false
-            }
-          }
-        }
-        return request
-      }
+      }      
     </script>
   </body>
 </html>

18/urlget.html

@@ -0,0 +1,27 @@
+<!DOCTYPE html>
+<html> <!-- urlget.html -->
+  <head>
+    <title>Asynchronous Communication Example</title>
+  </head>
+  <body style='text-align:center'>
+    <h1>Loading a web page into a DIV</h1>
+    <div id='info'>This sentence will be replaced</div>
+
+    <script>
+      let nocache = "&nocache=" + Math.random() * 1000000
+      let XHR     = new XMLHttpRequest()
+
+      XHR.open("POST", "http://127.0.0.1/18/urlget.php?url=news.com" + nocache, true)
+      XHR.setRequestHeader("Content-type", "application/x-www-form-urlencoded")
+      XHR.send()
+
+      XHR.onreadystatechange = function()
+      {
+        if (this.readyState == 4 && this.status == 200)
+        {
+          document.getElementById("info").innerHTML = this.responseText
+        }
+      }      
+    </script>
+  </body>
+</html>

18/urlpost.html

@@ -0,0 +1,26 @@
+<!DOCTYPE html>
+<html> <!-- urlpost.html -->
+  <head>
+    <title>Asynchronous Communication Example</title>
+  </head>
+  <body style='text-align:center'>
+    <h1>Loading a web page into a DIV</h1>
+    <div id='info'>This sentence will be replaced</div>
+
+    <script>
+      let XHR = new XMLHttpRequest()
+
+      XHR.open("POST", "http://127.0.0.1/18/urlpost.php", true)
+      XHR.setRequestHeader("Content-type", "application/x-www-form-urlencoded")
+      XHR.send("url=news.com")
+
+      XHR.onreadystatechange = function()
+      {
+        if (this.readyState == 4 && this.status == 200)
+        {
+          document.getElementById("info").innerHTML = this.responseText
+        }
+      }      
+    </script>
+  </body>
+</html>

18/xmlget.html

@@ -0,0 +1,35 @@
+<!DOCTYPE html>
+<html> <!-- xmlget.html -->
+  <head>
+    <title>Asynchronous Communication Example</title>
+  </head>
+  <body>
+    <h1>Loading XML data into a DIV</h1>
+    <div id='info'>This sentence will be replaced</div>
+  
+    <script>
+      let out     = ''
+      let nocache = "&nocache=" + Math.random() * 1000000
+      let url     = "rss.news.yahoo.com/rss/topstories"
+      let XHR     = new XMLHttpRequest()
+    
+      XHR.open("POST", "http://127.0.0.1/18/xmlget.php?url=" + url + nocache, true)
+      XHR.setRequestHeader("Content-type", "application/x-www-form-urlencoded")
+      XHR.send()
+
+      XHR.onreadystatechange = function()
+      {
+        if (this.readyState == 4 && this.status == 200)
+        {
+           let titles = this.responseXML.getElementsByTagName('title')
+
+           for (let j = 0 ; j < titles.length ; ++j)
+           {
+             out += titles[j].childNodes[0].nodeValue + '<br>'
+           }
+           document.getElementById('info').innerHTML = out  
+        }
+      }      
+    </script>
+  </body>
+</html>

18/xmlget.php

@@ -0,0 +1,14 @@
+<?php // xmlget.php
+  if (isset($_GET['url']))
+  {
+    header('Content-Type: text/xml');
+    echo file_get_contents("http://".sanitizeString($_GET['url']));
+  }
+
+  function sanitizeString($var)
+  {
+    $var = strip_tags($var);
+    $var = htmlentities($var);
+    return stripslashes($var);
+  }
+?>

20/02.html

@@ -19,33 +19,15 @@
         border-radius        :40px;
       }
       .b2 {
-        -moz-border-radius   :40px 40px 20px 20px;
-        -webkit-border-radius:40px 40px 20px 20px;
         border-radius        :40px 40px 20px 20px;
       }
       .b3 {
-        -moz-border-radius-topleft        :20px;
-        -moz-border-radius-topright       :40px;
-        -moz-border-radius-bottomleft     :60px;
-        -moz-border-radius-bottomright    :80px;
-        -webkit-border-top-left-radius    :20px;
-        -webkit-border-top-right-radius   :40px;
-        -webkit-border-bottom-left-radius :60px;
-        -webkit-border-bottom-right-radius:80px;
         border-top-left-radius            :20px;
         border-top-right-radius           :40px;
         border-bottom-left-radius         :60px;
         border-bottom-right-radius        :80px;
       }
       .b4 {
-        -moz-border-radius-topleft        :40px 20px;
-        -moz-border-radius-topright       :40px 20px;
-        -moz-border-radius-bottomleft     :20px 40px;
-        -moz-border-radius-bottomright    :20px 40px;
-        -webkit-border-top-left-radius    :40px 20px;
-        -webkit-border-top-right-radius   :40px 20px;
-        -webkit-border-bottom-left-radius :20px 40px;
-        -webkit-border-bottom-right-radius:20px 40px;
         border-top-left-radius            :40px 20px;
         border-top-right-radius           :40px 20px;
         border-bottom-left-radius         :20px 40px;

20/03.html

@@ -6,12 +6,6 @@
       .columns {
         text-align          :justify;
         font-size           :16pt;
-        -moz-column-count   :3;
-        -moz-column-gap     :1em;
-        -moz-column-rule    :1px solid black;
-        -webkit-column-count:3;
-        -webkit-column-gap  :1em;
-        -webkit-column-rule :1px solid black;
         column-count        :3;
         column-gap          :1em;
         column-rule         :1px solid black;

20/04.html

@@ -15,17 +15,9 @@
         border-style      :solid;
         background        :orange;
         transition        :all .8s ease-in-out;
-        -moz-transition   :all .8s ease-in-out;
-        -webkit-transition:all .8s ease-in-out;
-        -o-transition     :all .8s ease-in-out;
-        -ms-transition    :all .8s ease-in-out;
       }
       #square:hover {
         background        :yellow;
-        -moz-transform    :rotate(180deg);
-        -webkit-transform :rotate(180deg);
-        -o-transform      :rotate(180deg);
-        -ms-transform     :rotate(180deg);
         transform         :rotate(180deg);
       }
     </style>

21/08.html

@@ -12,18 +12,19 @@
 
       newdiv    = document.createElement('div')
       newdiv.id = 'NewDiv'
-      document.body.appendChild(newdiv)
+      document.body.append(newdiv)
 
       S(newdiv).border = 'solid 1px red'
       S(newdiv).width  = '100px'
       S(newdiv).height = '100px'
       newdiv.innerHTML = "I'm a new object inserted in the DOM"
-      tmp              = newdiv.offsetTop
-
-      alert('Click OK to remove the element')
-      pnode = newdiv.parentNode
-      pnode.removeChild(newdiv)
-      tmp = pnode.offsetTop
+      
+      setTimeout(function()
+      {
+        alert('Click OK to remove the element')
+      
+        newdiv.parentNode.removeChild(newdiv)
+      }, 1000)
     </script>
   </body>
 </html>

26/16.html

@@ -19,26 +19,25 @@
         return degrees * Math.PI / 180
       }
 
-      // Following is the original example code
-      //
-      // arcs =
-      // [
-      //   Math.PI,
-      //   Math.PI * 2,
-      //   Math.PI / 2,
-      //   Math.PI / 180 * 59
-      // ]
-      //
-      // Below the code now uses degrees as arguments
-
       arcs =
       [
-        Math.degreesToRadians(180),
-        Math.degreesToRadians(360),
-        Math.degreesToRadians(90),
-        Math.degreesToRadians(59)
+        Math.PI,
+        Math.PI * 2,
+        Math.PI / 2,
+        Math.PI / 180 * 59
       ]
 
+      // This code below uses degrees as arguments as shown
+      // later in the chapter
+
+      // arcs =
+      // [
+      //   Math.degreesToRadians(180),
+      //   Math.degreesToRadians(360),
+      //   Math.degreesToRadians(90),
+      //   Math.degreesToRadians(59)
+      // ]
+
       for (j = 0 ; j < 4 ; ++j)
       {
         context.beginPath()

29/01.php

@@ -1,8 +1,8 @@
 <?php // Example 01: functions.php
   $host = 'localhost';    // Change as necessary
-  $data = 'publications'; // Change as necessary
-  $user = 'root';         // Change as necessary
-  $pass = 'mysql';        // Change as necessary
+  $data = 'robinsnest';   // Change as necessary
+  $user = 'robinsnest';   // Change as necessary
+  $pass = 'password';     // Change as necessary
   $chrs = 'utf8mb4';
   $attr = "mysql:host=$host;dbname=$data;charset=$chrs";
   $opts =
@@ -16,9 +16,9 @@
   {
     $pdo = new PDO($attr, $user, $pass, $opts);
   }
-  catch (\PDOException $e)
+  catch (PDOException $e)
   {
-    throw new \PDOException($e->getMessage(), (int)$e->getCode());
+    throw new PDOException($e->getMessage(), (int)$e->getCode());
   }
 
   function createTable($name, $query)
@@ -59,13 +59,13 @@
     if (file_exists("$user.jpg"))
       echo "<img src='$user.jpg' style='float:left;'>";
 
-    $result = queryMysql("SELECT * FROM profiles WHERE user='$user'");
+    $result = $pdo->query("SELECT * FROM profiles WHERE user='$user'");
 
-    if ($result->rowCount())
+    while ($row = $result->fetch())
     {
-      $row = $result->fetch();
-      echo stripslashes($row['text']) . "<br style='clear:left;'><br>";
+      die(stripslashes($row['text']) . "<br style='clear:left;'><br>");
     }
-    else echo "<p>Nothing to see here, yet</p><br>";
+    
+    echo "<p>Nothing to see here, yet</p><br>";
   }
 ?>

3/01.php

@@ -0,0 +1,4 @@
+<?php
+  echo "Hello world";
+?>
+

3/02.php

@@ -0,0 +1,6 @@
+<?php
+/* This is a section
+   of multi-line comments
+   which will not be
+   interpreted */
+?>

3/03.php

@@ -0,0 +1,5 @@
+<?php
+  $mycounter = 1;
+  $mystring  = "Hello";
+  $myarray   = array("One", "Two", "Three");
+?>

3/04.php

@@ -0,0 +1,7 @@
+<?php // test1.php
+  $username = "Fred Smith";
+  echo $username;
+  echo "<br>";
+  $current_user = $username;
+  echo $current_user;
+?>

3/05.php

@@ -0,0 +1,7 @@
+<?php
+  $oxo = array(array('x', ' ', 'o'),
+               array('o', 'o', 'x'),
+               array('x', 'o', ' '));
+  
+  echo $oxo[1][2];
+?>

3/06.php

@@ -0,0 +1,8 @@
+<?php
+  $author = "Steve Ballmer";
+
+  echo "Developers, Developers, developers, developers, developers,
+  developers, developers, developers, developers!
+
+  - $author.";
+?>

3/07.php

@@ -0,0 +1,10 @@
+<?php
+  $author = "Bill Gates";
+
+  $text = "Measuring programming progress by lines of code is like
+  Measuring aircraft building progress by weight.
+
+  - $author.";
+
+  echo $text;
+?>

3/08.php

@@ -0,0 +1,11 @@
+<?php
+  $author = "Brian W. Kernighan";
+
+  echo <<<_END
+  Debugging is twice as hard as writing the code in the first place.
+  Therefore, if you write the code as cleverly as possible, you are,
+  by definition, not smart enough to debug it.
+  
+  - $author.
+_END;
+?>

3/09.php

@@ -0,0 +1,11 @@
+<?php
+  $author = "Scott Adams";
+
+  $out = <<<_END
+  Normal people believe that if it ain’t broke, don’t fix it.
+  Engineers believe that if it ain’t broke, it doesn’t have enough
+  features yet.
+
+  - $author.
+_END;
+?>

3/10.php

@@ -0,0 +1,4 @@
+<?php
+  $number = 12345 * 67890;
+  echo substr($number, 3, 1);
+?>

3/11.php

@@ -0,0 +1,5 @@
+<?php
+  $pi     = "3.1415927";
+  $radius = 5;
+  echo $pi * ($radius * $radius);
+?>

3/12.php

@@ -0,0 +1,6 @@
+<?php
+  function longdate($timestamp)
+  {
+    return date("l F jS Y", $timestamp);
+  }
+?>

3/13.php

@@ -0,0 +1,7 @@
+<?php
+  function longdate($timestamp)
+  {
+    $temp = date("l F jS Y", $timestamp);
+    return "The date is $temp";
+  }
+?>

3/14.php

@@ -0,0 +1,9 @@
+<?php
+  $temp = "The date is ";
+  echo longdate(time());
+
+  function longdate($timestamp)
+  {
+    return $temp . date("l F jS Y", $timestamp);
+  }
+?>

3/15.php

@@ -0,0 +1,9 @@
+<?php
+  $temp = "The date is ";
+  echo $temp . longdate(time());
+
+  function longdate($timestamp)
+  {
+    return date("l F jS Y", $timestamp);
+  }
+?>

3/16.php

@@ -0,0 +1,9 @@
+<?php
+  $temp = "The date is ";
+  echo longdate($temp, time());
+
+  function longdate($text, $timestamp)
+  {
+    return $text . date("l F jS Y", $timestamp);
+  }
+?>

3/17.php

@@ -0,0 +1,13 @@
+<?php
+
+  echo test();
+  echo "<br><br>";
+  echo test();
+    
+  function test()
+  {
+    static $count = 0;
+    echo $count;
+    $count++;
+  }
+?>

3/18.php

@@ -0,0 +1,5 @@
+<?php
+  static $int = 0;         // Allowed 
+  static $int = 1+2;       // Disallowed (will produce a Parse error)
+  static $int = sqrt(144); // Disallowed
+?>

4/01.php

@@ -0,0 +1,6 @@
+<?php
+  echo "a: [" . (20 > 9) . "]<br>";
+  echo "b: [" . (5 == 6) . "]<br>";
+  echo "c: [" . (1 == 0) . "]<br>";
+  echo "d: [" . (1 == 1) . "]<br>";
+?>

4/02.php

@@ -0,0 +1,4 @@
+<?php // test2.php
+  echo "a: [" . TRUE  . "]<br>";
+  echo "b: [" . FALSE . "]<br>";
+?>

4/03.php

@@ -0,0 +1,10 @@
+<?php
+  $myname = "Brian";
+  $myage  = 37;
+
+  echo "a: " . 73      . "<br>"; // Numeric literal
+  echo "b: " . "Hello" . "<br>"; // String literal
+  echo "c: " . FALSE   . "<br>"; // Constant literal
+  echo "d: " . $myname . "<br>"; // String variable
+  echo "e: " . $myage  . "<br>"; // Numeric variable
+?>

4/04.php

@@ -0,0 +1,9 @@
+<?php
+  $day_number       = 340;                // Assignment by Value
+  $days_to_new_year = 366 - $day_number;  // Assignment by Expression
+
+  if ($days_to_new_year < 30)             // Condition
+  {
+    echo "Not long now till new year";    // Statement
+  }
+?>

4/11.php

@@ -0,0 +1,3 @@
+<?php
+  $level = $score = $time = 0;
+?>

4/12.php

@@ -0,0 +1,5 @@
+<?php
+  $month = "March";
+
+  if ($month == "March") echo "It's springtime";
+?>

4/13.php

@@ -0,0 +1,7 @@
+<?php
+  $a = "1000";
+  $b = "+1000";
+
+  if ($a == $b)  echo "1";
+  if ($a === $b) echo "2";
+?>

4/14.php

@@ -0,0 +1,7 @@
+<?php
+  $a = "1000";
+  $b = "+1000";
+
+  if ($a != $b)  echo "1";
+  if ($a !== $b) echo "2";
+?>

4/15.php

@@ -0,0 +1,7 @@
+<?php
+  $a = 2; $b = 3;
+  if ($a > $b)  echo "$a is greater than $b<br>";
+  if ($a < $b)  echo "$a is less than $b<br>";
+  if ($a >= $b) echo "$a is greater than or equal to $b<br>";
+  if ($a <= $b) echo "$a is less than or equal to $b<br>";
+?>

4/16.php

@@ -0,0 +1,8 @@
+<?php
+  $a = 1; $b = 0;
+
+  echo ($a AND $b) . "<br>";
+  echo ($a or $b)  . "<br>";
+  echo ($a XOR $b) . "<br>";
+  echo !$a         . "<br>";
+?>

4/17.php

@@ -0,0 +1,3 @@
+<?php
+  if ($finished == 1 or getnext() == 1) exit;
+?>

4/18.php

@@ -0,0 +1,5 @@
+<?php
+  $gn = getnext();
+
+  if ($finished == 1 or $gn == 1) exit;
+?>

4/19.php

@@ -0,0 +1,7 @@
+<?php
+  if ($bank_balance < 100)
+  {
+    $money         = 1000;
+    $bank_balance += $money;
+  }
+?>

4/20.php

@@ -0,0 +1,12 @@
+<?php
+  if ($bank_balance < 100)
+  {
+    $money         = 1000;
+    $bank_balance += $money;
+  }
+  else
+  {
+    $savings      += 50;
+    $bank_balance -= 50;
+  }
+?>

4/21.php

@@ -0,0 +1,17 @@
+<?php
+  if ($bank_balance < 100)
+  {
+  	$money         = 1000;
+  	$bank_balance += $money;
+  }
+  elseif ($bank_balance > 200)
+  {
+  	$savings      += 100;
+  	$bank_balance -= 100;
+  }
+  else
+  {
+  	$savings      += 50;
+  	$bank_balance -= 50;
+  }
+?>

4/22.php

@@ -0,0 +1,10 @@
+<?php
+  $page = "test";
+
+  if     ($page == "Home")  echo "You selected Home";
+  elseif ($page == "About") echo "You selected About";
+  elseif ($page == "News")  echo "You selected News";
+  elseif ($page == "Login") echo "You selected Login";
+  elseif ($page == "Links") echo "You selected Links";
+  else                      echo "Unrecognized selection";
+?>

4/23.php

@@ -0,0 +1,15 @@
+<?php
+  switch ($page)
+  {
+  	case "Home":  echo "You selected Home";
+  		break;
+  	case "About": echo "You selected About";
+  		break;
+  	case "News":  echo "You selected News";
+  		break;
+  	case "Login": echo "You selected Login";
+  		break;
+  	case "Links": echo "You selected Links";
+  		break;
+  }
+?>

4/24.php

@@ -0,0 +1,23 @@
+<?php
+switch ($page)
+{
+	case "Home":
+	    echo "You selected Home";
+		break;
+	case "About":
+	    echo "You selected About";
+		break;
+	case "News":
+	    echo "You selected News";
+		break;
+	case "Login":
+	    echo "You selected Login";
+		break;
+	case "Links":
+	    echo "You selected Links";
+		break;
+	default:
+	    echo "Unrecognized selection";
+		break;
+}
+?>

4/25.php

@@ -0,0 +1,13 @@
+<?php
+  switch ($page):
+  	case "Home":
+  		echo "You selected Home";
+  		break;
+  
+  	// etc...
+  
+  	case "Links":
+  		echo "You selected Links";
+  		break;
+  endswitch;
+?>

4/26.php

@@ -0,0 +1,3 @@
+<?php
+  echo $fuel <= 1 ? "Fill tank now" : "There's enough fuel";
+?>

4/27.php

@@ -0,0 +1,3 @@
+<?php
+  $enough = $fuel <= 1 ? FALSE : TRUE;
+?>

4/28.php

@@ -0,0 +1,9 @@
+<?php
+  $fuel = 10;
+
+  while ($fuel > 1)
+  {
+	// Keep driving …
+	echo "There's enough fuel";
+  }
+?>

4/29.php

@@ -0,0 +1,9 @@
+<?php
+  $count = 1;
+
+  while ($count <= 12)
+  {
+	echo "$count times 12 is " . $count * 12 . "<br>";
+	++$count;
+  }
+?>

4/30.php

@@ -0,0 +1,6 @@
+<?php
+  $count = 0;
+
+  while (++$count <= 12)
+	echo "$count times 12 is " . $count * 12 . "<br>";
+?>

4/31.php

@@ -0,0 +1,7 @@
+<?php
+  $count = 1;
+
+  do
+	echo "$count times 12 is " . $count * 12 . "<br>";
+  while (++$count <= 12);
+?>

4/32.php

@@ -0,0 +1,8 @@
+<?php
+  $count = 1;
+  
+  do {
+	echo "$count times 12 is " . $count * 12;
+	echo "<br>";
+  } while (++$count <= 12);
+?>

4/33.php

@@ -0,0 +1,4 @@
+<?php
+  for ($count = 1 ; $count <= 12 ; ++$count)
+	echo "$count times 12 is " . $count * 12 . "<br>";
+?>

4/34.php

@@ -0,0 +1,7 @@
+<?php
+  for ($count = 1 ; $count <= 12 ; ++$count)
+  {
+	echo "$count times 12 is " . $count * 12;
+	echo "<br>";
+  }
+?>

4/35.php

@@ -0,0 +1,12 @@
+<?php
+  $fp = fopen("text.txt", 'wb');
+
+  for ($j = 0 ; $j < 100 ; ++$j)
+  {
+	$written = fwrite($fp, "data");
+
+	if ($written == FALSE) break;
+  }
+
+  fclose($fp);
+?>

4/36.php

@@ -0,0 +1,12 @@
+<?php
+  $j = 10;
+
+  while ($j > -10)
+  {
+    $j--;
+
+    if ($j == 0) continue;
+
+    echo (10 / $j) . "<br>";
+  }
+?>

4/37.php

@@ -0,0 +1,7 @@
+<?php
+  $a = 56;
+  $b = 12;
+  $c = $a / $b;
+
+  echo $c;
+?>

5/01.php

@@ -0,0 +1,5 @@
+<?php
+  echo strrev(" .dlrow olleH"); // Reverse string
+  echo str_repeat("Hip ", 2);   // Repeat string
+  echo strtoupper("hooray!");   // String to upper case
+?>

5/02.php

@@ -0,0 +1,12 @@
+<?php
+  echo fix_names("WILLIAM", "henry", "gatES");
+
+  function fix_names($n1, $n2, $n3)
+  {
+    $n1 = ucfirst(strtolower($n1));
+    $n2 = ucfirst(strtolower($n2));
+    $n3 = ucfirst(strtolower($n3));
+
+    return $n1 . " " . $n2 . " " . $n3;
+  }
+?>

5/03.php

@@ -0,0 +1,13 @@
+<?php
+  $names = fix_names("WILLIAM", "henry", "gatES");
+  echo $names[0] . " " . $names[1] . " " . $names[2];
+
+  function fix_names($n1, $n2, $n3)
+  {
+    $n1 = ucfirst(strtolower($n1));
+    $n2 = ucfirst(strtolower($n2));
+    $n3 = ucfirst(strtolower($n3));
+
+    return array($n1, $n2, $n3);
+  }
+?>

5/04.php

@@ -0,0 +1,16 @@
+<?php
+  $a1 = "WILLIAM";
+  $a2 = "henry";
+  $a3 = "gatES";
+
+  echo $a1 . " " . $a2 . " " . $a3 . "<br>";
+  fix_names($a1, $a2, $a3);
+  echo $a1 . " " . $a2 . " " . $a3;
+
+  function fix_names(&$n1, &$n2, &$n3)
+  {
+    $n1 = ucfirst(strtolower($n1));
+    $n2 = ucfirst(strtolower($n2));
+    $n3 = ucfirst(strtolower($n3));
+  }
+?>

5/05.php

@@ -0,0 +1,16 @@
+<?php
+  $a1 = "WILLIAM";
+  $a2 = "henry";
+  $a3 = "gatES";
+
+  echo $a1 . " " . $a2 . " " . $a3 . "<br>";
+  fix_names();
+  echo $a1 . " " . $a2 . " " . $a3;
+
+  function fix_names()
+  {
+    global $a1; $a1 = ucfirst(strtolower($a1));
+    global $a2; $a2 = ucfirst(strtolower($a2));
+    global $a3; $a3 = ucfirst(strtolower($a3));
+  }
+?>

5/06.php

@@ -0,0 +1,6 @@
+<?php
+  include("library.php");
+
+  // Your code goes here
+?>
+

5/07.php

@@ -0,0 +1,7 @@
+<?php
+  include_once("library.php");
+
+  // Your code goes here
+?>
+
+

5/08.php

@@ -0,0 +1,5 @@
+<?php
+  require_once("library.php");
+
+  // Your code goes here
+?>

5/09.php

@@ -0,0 +1,10 @@
+<?php
+  if (function_exists("array_combine"))
+  {
+    echo "Function exists";
+  }
+  else
+  {
+    echo "Function does not exist - better write our own";
+  }
+?>

5/10.php

@@ -0,0 +1,14 @@
+<?php
+  $object = new User;
+  print_r($object);
+
+  class User
+  {
+    public $name, $password;
+
+    function save_user()
+    {
+  	  echo "Save User code goes here";
+    }
+  }
+?>

5/11.php

@@ -0,0 +1,20 @@
+<?php
+  $object = new User;
+  print_r($object); echo "<br>";
+
+  $object->name = "Joe";
+  $object->password = "mypass";
+  print_r($object); echo "<br>";
+
+  $object->save_user();
+
+  class User
+  {
+    public $name, $password;
+
+    function save_user()
+    {
+  	  echo "Save User code goes here";
+    }
+  }
+?>

5/12.php

@@ -0,0 +1,14 @@
+<?php
+  $object1 = new User();
+  $object1->name = "Alice";
+  $object2 = $object1;
+  $object2->name = "Amy";
+
+  echo "object1 name = " . $object1->name . "<br>";
+  echo "object2 name = " . $object2->name;
+  
+  class User
+  {
+    public $name;
+  }
+?>

5/13.php

@@ -0,0 +1,14 @@
+<?php
+  $object1 = new User();
+  $object1->name = "Alice";
+  $object2 = clone $object1;
+  $object2->name = "Amy";
+
+  echo "object1 name = " . $object1->name . "<br>";
+  echo "object2 name = " . $object2->name;
+  
+  class User
+  {
+    public $name;
+  }
+?>

5/14.php

@@ -0,0 +1,9 @@
+<?php
+  class User
+  {
+      function __construct($param1, $param2)
+    {
+      // Constructor statements go here
+    }
+  }
+?>

5/15.php

@@ -0,0 +1,9 @@
+<?php
+  class Test
+  {
+    public $name = "Paul Smith"; // Valid
+    public $age = 42; // Valid
+    public $time = time(); // Invalid - calls a function
+    public $score = $level * 2; // Invalid - uses an expression
+  }
+?>

5/16.php

@@ -0,0 +1,10 @@
+<?php
+  class User
+  {
+    public $name, $password;
+
+    function get_password()
+  {
+    return $this->password;
+  }
+?>

5/17.php

@@ -0,0 +1,8 @@
+<?php
+  $object1       = new User();
+  $object1->name = "Alice";
+
+  echo $object1->name;
+
+  class User {}
+?>

5/18.php

@@ -0,0 +1,9 @@
+<?php
+  class Test
+  {
+    public $name  = "Paul Smith"; // Valid
+    public $age   = 42;           // Valid
+    public $time  = time();       // Invalid - calls a function
+    public $score = $level * 2;   // Invalid - uses an expression
+  }
+?>