$Page_Content = addslashes($Page_Content);
$query = "UPDATE site_content SET Page_Title='$Page_Title', Page_Content='$Page_Content' WHERE id_f='$id_f'";
query_db($query);

$query = "SELECT DISTINCT Client_Name FROM Portfolio ORDER BY Client_Name ASC";
$result = query_db($query);

while ($myrow = mysql_fetch_array($result))
{
echo $myrow[Client_Name].", ";
}

Order by Two Columns

Sort the display by Ascending or Descending Order

Numeric Data Types

• TINYINT: very small numbers; suitable for ages. Actually, we should have used this data type for employee ages and number of children. Can store numbers between 0 to 255 if UNSIGNED clause is applied, else the range is between -128 to 127.
• SMALLINT: Suitable for numbers between 0 to 65535 (UNSIGNED) or -32768 to 32767.
• MEDIUMINT: 0 to 16777215 with UNSIGNED clause or -8388608 to 8388607.
• INT: UNSIGNED integers fall between 0 to 4294967295 or -2147683648 to 2147683647.
• BIGINT: Huge numbers. (-9223372036854775808 to 9223372036854775807)
• FLOAT: Floating point numbers (single precision)
• DOUBLE: Floating point numbers (double precision)
• DECIMAL:Floating point numbers represented as strings.

Date and Time Data types

Text Data Type

• CHAR(x): where x can range from 1 to 255.
• VARCHAR(x): x ranges from 1 - 255
• TINYTEXT: small text, case insensitive
• TEXT: slightly longer text, case insensitive
• MEDIUMTEXT: medium size text, case insensitive
• LONGTEXT: really long text, case insensitive
• TINYBLOB: Blob means a Binary Large OBject. You should use blobs for case sensitive searches.
• BLOB: slightly larger blob, case sensitive.
• MEDIUMBLOB: medium sized blobs, case sensitive.
• LONGBLOB: really huge blobs, case sensitive.
• ENUM: Enumeration data type have fixed values and the column can take only one value from the given set. The values are placed in parenthesis following ENUM declaration. An example, is the marital status column we encountered in employee_per table.

  m_status ENUM("Y", "N")

  Thus, m_status column will take only Y or N as values. If you specify any other value with the INSERT statement, MYSQL will not return an error, it just inserts a NULL value in the column.
• SET: An extension of ENUM. Values are fixed and placed after the SET declaration; however, SET columns can take multiple values from the values provided. Consider a column with the SET data type as

  foods SET ("Apples", "Cookies", "Pies", "Chicken")

  You can have 0 or all the four values in the column.

  INSERT tablename (foods) values ("Apple", "Cookies");

PHP & database connection code in a lib file for inclusion

function dbconnect() { global $dbhost, $dbuser, $dbpass, $dbname; mysql_pconnect($dbhost, $dbuser, $dbpass); @mysql_select_db($dbname) or die ("Unable to select database"); }

function query_db($query) { dbconnect(); return @mysql_query($query); } ?>

Database Manager (PhpMyAdmin) to create a new table

CREATE TABLE car_table (

car_make varchar(250) default NULL, car_model varchar(250) default NULL, car_year varchar(250) default NULL, id_field int(11) NOT NULL auto_increment, PRIMARY KEY (id_field) ) TYPE=MyISAM;

PHP code for managing your table fields

Third PHP file for visitors without the edit or delete functions.

SELECT * FROM table ORDER BY (field1 / field2) DESC

SELECT * FROM table ORDER BY (field1 / field2) DESC, field3 DESC

1. Looking for an exact match in field1: SELECT * FROM table WHERE field1 = '$name'
2. Looking if the field1 contains the search word anywhere using LIKE and both '%%' SELECT * FROM table WHERE field1 LIKE '%$word%'
3. Looking if the field1 contains the value that begins with our word using LIKE and the last ' %' SELECT * FROM table WHERE field1 LIKE '$word%'
4. Looking if the field1 contains the value that ends with our word using LIKE and the first '% ' SELECT * FROM table WHERE field1 LIKE '%$word'
5. Looking if our search word appears in both fields using AND SELECT * FROM table WHERE field1 LIKE '%$word%' AND field2 LIKE '%$word%'
6. Looking if our search word appears in any of the two fields using OR SELECT * FROM table WHERE field1 LIKE '%$word%' OR field2 LIKE '%$word%'
7. Looking if our word is in field1 OR in field2 AND field3 using Parentheses SELECT * FROM table WHERE field1 LIKE '%$word%' OR (field2 LIKE '%$word%' AND field2 LIK

What do you need:

• PHP - obviously you know this from the title Get it from PHP's website, available in source or binary for free.
• MySQL - here we store the data. You should probably be able to use some other database also with a few modifications. Download from your nearest MySQL mirror. It is available through a GPL license in source or binary.
• Apache or some other web server to test it all, and a hosting service for permanent storage. You can get Apache for free too. Source and binaries are available.

What are you expected to already know:

• XHTML/HTML of course, after all this is what PHP sends the browser.
• CSS - basic knowledge, if you like to control the way things look.
• JavaScript - for client-side validation, not needed if you want to only check on the server-side, which is a lot slower and higher network load.
• PHP - this is not a PHP tutorial, just an example. At least basic knowledge is needed.
• MySQL - you have to create the database and tables or let someone else do it for you.

A word about the configurations

php_value arg_separator.output "&"
php_value arg_separator.input "&"
php_flag register_globals off
php_flag short_open_tag off
php_flag magic_quotes_gpc off

Getting started

Globally included code

function connect_db() {
   global $link;

   $db_host = "localhost";
   $db_username = 'username';
   $db_pass = 'password';
   $db_name = 'database_name';

   $link = @mysql_connect($db_host, $db_username, $db_pass)
      or die ("Could not connect to database");
   @mysql_select_db ($db_name)
      or die ("Could not select database");
}

<?php
   if ( !isset($link) )
      connect_db();
   $res = @mysql_query("select count from poll where id=0")
      or die("Query cm p0 failed");
   $result = mysql_fetch_object($res);

   $poll = (int) $HTTP_GET_VARS['poll'];
   if ( ($poll < 1) or ($poll > $result->count) ) {
      mt_srand ((double) microtime() * 1000000);
      $poll = mt_rand(1,$result->count);
   }
?>

<form method="get" action="poll.php"
   onsubmit="return validateVote(this.vote)">
<table border="0" summary="poll inputs">

<?php
   $res = @mysql_query("select title, count, last from poll where id=$poll")
      or die("Query poll failed");
   $result = mysql_fetch_object($res);
?>
   <tr><td><?php echo $result->title?></td></tr>
<?php
   $total = $result->count;
   $date = $result->last;

   $res = @mysql_query("select text, vote from poll_data where id=$poll")
      or die("Query poll_data failed");
   while ($row = mysql_fetch_object ($res)) {
      $input ='<input type="radio" name="vote" value="' .
         $row->vote . '" />';
      echo "<tr><td>$input $row->text</td></tr>";
   }
?>

   <tr><td>Total&#160;votes:&#160;<?php echo $total?></td></tr>
   <tr><td>Last&#160;vote:&#160;<?php echo $date?></td></tr>

   <tr><td><input type="submit" value="Vote" />
      <a href="poll.php?poll=<?php echo $poll?>"
         title="View the current poll results">Results</a></td></tr>
</table>
   <div>

   <input type="hidden" id="poll" name="poll" value="<?php echo $poll?>" />
   </div>
</form>

function validateVote(vote) {
   valid = false;

   // Opera 5.05 Linux does not support for/in on this object
   for ( var i = 0; i <  vote.length; i   ) {
      if ( vote[i].checked ) {
         valid = true;
         break;
      }
   }
   if ( ! valid ) {
      alert("You must choose one");
   }
   return valid;
}

<Files "my_db_password_in_here.php">
    Order deny,allow
    Deny from all
</Files>

The Poll Handling Code

<?php
   require "global_includes_file.php";
   if ( !isset($link) )
      connect_db();

   $res = @mysql_query("select count from poll where id=0")
      or die("Query polls failed");
   $result = mysql_fetch_row($res);
   $polls = $result[0];

   $poll = (int) $HTTP_GET_VARS['poll'];
   if ( $poll > $polls or $poll < 1 )
      $poll = 1;

$poll_voted = (int) $HTTP_COOKIE_VARS['voted'];
$poll_bit = ( 1 << $poll );
if ( !($poll_voted & $poll_bit) ) {
	$poll_ok = true;
} else {
	$poll_ok = false;
}

$vote = (int) $HTTP_GET_VARS['vote'];
if ( $poll_ok and $vote > 0 and $vote < 6 ) { // count the vote
	$cookie_voted = $poll_voted | $poll_bit;
	setcookie('voted', $cookie_voted, time() 2592000); // one month time

	$sql = "update poll set count=count 1, last=now() where id=$poll";
	@mysql_query($sql) or die('Query p2 failed');

	$sql = "update poll_data set count=count 1 " .
		"where id=$poll and vote=$vote";
	@mysql_query($sql) or die('Query p3 failed');
}

function my_esc($input) {
	return mysql_escape_string(htmlspecialchars($input) );
}

if ( $HTTP_SERVER_VARS['REQUEST_METHOD'] == 'POST' ) {
	$comment = my_esc($HTTP_POST_VARS['fComments']);
	$subject = my_esc($HTTP_POST_VARS['fSubject']);
	$name = my_esc($HTTP_POST_VARS['fName']);
	if ( $name == '' )
		$name = 'anonymous';
	$email = my_esc($HTTP_POST_VARS['fEmail']);
	$poll = (int) $HTTP_POST_VARS['poll'];

	if ( $comment != '' )
		$sql = "insert into comments " .
			"(name, subject, email, comment, date, poll)" .
			"values('$name', '$subject', '$email', " .
			"'$comment', now(), $poll)"

		@mysql_query($sql)
			or die('Query add comments failed');
}

	begin_head();
?>
<meta name="description" content="Poll results and comments" />
<title>Think up one</title>
<?php
	begin_body()
?>

<h1>Poll results and comments</h1>
<?php
   if ( !$poll_ok and $vote )
      echo "<p>You are not allowed to vote again</p>";

   $sql = "select title, count, last from poll where id=$poll";
   $res = @mysql_query($sql)
      or die("Query c2 failed");
   $result = mysql_fetch_object($res);
   echo "<h2>$result->title</h2>";
   $total = $result->count;
   $date = $result->last;

?>

<table border="0" cellspacing="5" summary="votes statistics">
<?php
   $sql = "select text, count from poll_data where id=$poll";
   $res = @mysql_query($sql)
      or die("Query c3 failed");
   if ( mysql_num_rows($res) == 0 ) {
      echo "<tr><td><p>Sorry still nothing in here</p></td><
;/tr>";
   } else {
      while ($row = mysql_fetch_object ($res)) {
         $share = round(100 * $row->count / $total, 2);
            echo "<tr><td>$row->text</td>

            <td>$share% ($row->count)</td></tr>";
      }
   }
?>
</table>
<p>
Total votes: <?php echo $total?><br />

Last vote: <?php echo $date?>
</p>

<h2>Other polls</h2>
<?php
   $res = @mysql_query("select * from poll where id!=$poll and id!=0")
      or die("Query c4 failed");
?>

<table border="0" cellspacing="5" summary="other polls">
<tr><th>Poll</th>
     <th>Votes</th>
     <th>Comments</th>

</tr>
<?php
   while ($row = mysql_fetch_object ($res)) {
?>
      <tr><td><a
href="poll.php?poll=<?php echo "$row->id" .'">' .
$row->title?></a></td>
      <td><?php echo $row->count?></td>

      <td><?php echo $row->comments?></td>
      </tr>
<?php
   }
?>
</table>

<h2>Comments</h2>
<div>
<?php
   $sql = "select name, subject, email, comment, date " .
      "from comments where poll=$poll&q
uot;;
   $res = @mysql_query($sql)
      or die("Query poll comments failed");
   if ( mysql_num_rows($res) == 0 ) {
      echo "<p>Sorry still nothing in here</p>";
   } else {
      while ($row = mysql_fetch_object ($res)) {
?>
         <div class="commenthead">

            <div class="subject"><?php echo $row->subject ?></div>
            <div class="info">by <a href="mailto:<?php echo $row->email ?>">
               <?php echo $row->name ?></a> on
               <?php echo gmdate('d M Y g:ia', strtotime($row->date)) ?> GMT
            </div>

         </div>

         <div class="comment">
         <?php echo $row->comment ?>
         </div>
<?php
      }
   }
?>
</div>

<h2>Say your mind</h2>

<form method="post" action="<?php echo $HTTP_SERVER_VARS['PHP_SELF']?>"
   onsubmit="return validateString(this.comment)">

<div><input type="hidden" name="poll" value="<?php echo $poll?>" /></div>
<div class="formwrapper">

<div class="row">
   <label for="fName"
      title="Write down your name here (optional)">Name:</label>
   <span><input type="text" name="fName" id="fName" size="25"
      title="Write down your name here (optional)" tabindex="1" /></span>

</div>

<div class="row">
   <label for="fEmail"
      title="Write down your e-mail here (optional)">E-mail:</label>
   <span><input type="text" name="fEmail" id="fEmail" size="25"
      title="Write down your e-mail here (optional)" tabindex="2" /></span>
</div>

<div class="row">
   <label for="fSubject"
      title="Write down a short subject, maximum 60 chars">Subject:</label>
   <span><input type="text" name="fSubject" id="fSubject" size="25"
      title="Write down a short subject, maximum 60 chars" tabindex="3" />
   </span>
</div>

<div class="row">
   <textarea cols="40" rows="6" name="fComments" id="fComments"
      title="Just write the message here" tabindex="4"></textarea>
</div>

<div class="row" style="padding-bottom : 10px;">
   <input type="submit" value="Submit comment"
      title="Submit the comment" tabindex="5" />

   <input type="reset" value="Clear form"
      title="Clears the text box" tabindex="6" />
</div>

</div>
</form>

<p>Note: All fields except the comments are optional.</p>

function validateString(str) {
   if ( str.value && str.value.length > 0 ) return true
   else {
      alert("You don't think I can read your mind do you?");
      str.focus();
      return false;
   }
}

Database stuff

CREATE TABLE poll (
   id int NOT NULL auto_increment,
   title varchar(100) NOT NULL default '',
   count int NOT NULL default '1',
   last date,
   PRIMARY KEY  (id)
);

CREATE TABLE poll_data (
   id int NOT NULL default '0',
   text char(50) NOT NULL default '',
   count int NOT NULL default '1',
   vote tinyint NOT NULL default '0'
);

create table comments(
   name varchar(30) not null default '',
   subject varchar(50) not null default '',
   email varchar(30) not null default '',
   comment text not null default '',
   date datetime not null default '',
   poll int not null default '0',
);

Stylesheet

• div.formwrapper
• div.row
• div.row label
• div.row span, you can make it div.row input if you clear up the code
• div.commenthead
• div.subject
• div .comment

To finish up