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full demo - top layer and main code file
Generating CSS through PHP example from a Well House Consultants training course
More on Generating CSS through PHP [link]
Source code: index.php Module: H118
<?php

$trace = "";

// PHP "reference card" and indexing system

/* Read in from $_REQUEST (POST, GET and COOKIE)
   Also in from $_SESSION to see how we're doing

   Write back out to $_SESSION
   Set up outputs for display in $fill */


require("stdsess.inc"); /* Web helpers */

/* next line sets up $fill for required look and feel */
require("style.inc"); /* Style sheet handlers */
$page = $fill[pagename] = $_REQUEST[pagename];

/* Some fallbacks that may get overridden */
////////////////////////////////////////////

$fill[lhtop] = "wiwb23";
$fill[rhtop] = "wiwb40";
$fill[mimage] = "tramm3";
$fill[stuff] = "<p>Hear the birds sing on the Marlbrough".
" Downs and the Wurzels sing at the Three Magpies</p>";
$fill[title] = "All Around Wiltshire";
$fill[linkon] = "";

/* Read in the main stuff here */
/////////////////////////////////

// Connect to the database

@mysql_connect("localhost","trainee","abc123");
@mysql_select_db("wellho");
/* Following line fails silently if the table
already exists! */

@mysql_query("create table refcards (".
        "pagename text, ".
        "lhtop text, ".
        "rhtop text, ".
        "mimage text, ".
        "title text, ".
        "body text, ".
        "id int primary key not null auto_increment)");

// Read in the current record to display

//////////////////////////////////////////////////
/* The updating and logging is stuff goes here */
//////////////////////////////////////////////////

/* Simple first scheme - hard code password and account */

$logname = "bourne";
$passcode = "enruob";
$fill[login] = "<p><form method=POST>".
        "To logout: ".
        "<input type=submit name=off value=logout></form></p>";

/* Right ... are we logged in, etc - what state are we in? */

session_start();
// Set up for a newcomer or find our where oldcomer is.
if (! $_SESSION[current]) {
   $current = 0;
} else {
   $current = $_SESSION[current];
}
if ($_REQUEST[off] == "logout") {
        $current = 0;
        session_destroy();
        }

######################### Handler responses from previous page

$error = 0;

$trace .= "current = $current";

switch ($current) {

case 0: // Finish up from initialisation with possible log in
        if ($_REQUEST[name] == $logname and
                $_REQUEST[pcode] == $passcode) {
                $current = 1;
        }
        break;
case 1: // Read back and store the edited text
        if ($_REQUEST[update_completed]) {
        mysql_query("delete from refcards where pagename = '$page'");
        $query = "insert into refcards ".
                "(pagename,body,title,lhtop,rhtop,mimage) values (".
                "\"$_REQUEST[pagename]\",".
                "\"$_REQUEST[body]\",".
                "\"$_REQUEST[title]\",".
                "\"$_REQUEST[lhtop]\",".
                "\"$_REQUEST[rhtop]\",".
                "\"$_REQUEST[mimage]\")";
        $trace .= "<br>$query";
        mysql_query($query);
        }
        break;
}

$_SESSION[current] = $current;

// Read in the page from the database for display
/////////////////////////////////////////////////

$rs = @mysql_query("select * from refcards where pagename = '$page'");
$info = @mysql_fetch_assoc($rs);
if ($info) {
        if ($info[lhtop]) $fill[lhtop] = $info[lhtop];
        if ($info[rhtop]) $fill[rhtop] = $info[rhtop];
        if ($info[mimage]) $fill[mimage] = $info[mimage];

// Take the body line by line ..
// .. deal with web special chars ..
        $paragraphs = explode("\n",htmlentities($info[body]));
// .. eliminate blank lines and join into <p> tags
        $live = preg_grep('/\S/',$paragraphs);
        $taggled = "<p>".implode("</p>\n<p>",$live)."</p>\n";

// .. Underlined, bold, italic support

        $taggled = preg_replace("/\[([u])\]/",'<\1>',$taggled);
        $taggled = preg_replace("!\[/([u])\]!",'</\1>',$taggled);

        $taggled = preg_replace("/\[([b])\]/",'<strong>',$taggled);
        $taggled = preg_replace("!\[/([b])\]!",'</strong>',$taggled);

        $taggled = preg_replace("/\[([i])\]/",'<em>',$taggled);
        $taggled = preg_replace("!\[/([i])\]!",'</em>',$taggled);

        $fill[stuff] = $taggled;
        $fill[title] = htmlentities($info[title]);
        }

// Read in all the other records in the system to make links

$rs = @mysql_query("select pagename,title from refcards where pagename != '$page'");
$fill[nlinks]=0;
while ($info = @mysql_fetch_assoc($rs)) {
        $fill[nlinks]++;
        $fill[linkon] .= "<p class=lynx>Link on to <a href=$info[pagename].html>".
                "$info[pagename]</a>$info[title]</p>";
        }

######################### Prepare for next form

switch ($current) {

case 0: // Not logged in. Just give them the page
        $fill[login] = "<p><form method=POST>".
        "To edit, give name <input name=name> and ".
        "password <input name=pcode type=password>".
        " and <input type=submit value=login></form></p>";
        $fill[form] = "";
    break;
case 1: // Logged in - offer the text for edit.
        $rs = @mysql_query("select * from refcards where pagename = '$page'");
        $info = @mysql_fetch_assoc($rs);
        if (! $info) $info = array();
        $fields = array (
           array("title","Page title",$info[title],$xttl),
           array("lhtop","Top left image",$info[lhtop],$xttl),
           array("rhtop","Top right image",$info[rhtop],$xttl),
           array("mimage","Main image",$info[mimage],$xttl),
           array("body","Page body",$info[body],$xbody,type=>"textarea")) ;
        $fill[form] = makeform($fields);
    break;
}
/* Ancilliary parameters */
///////////////////////////

$fill[year] = date("F Y");
$fill[trace] = "";
/* $fill[trace] = $trace; */ # Uncomment for analysis report

/* Complete the template */

$fh = fopen ("page.htp","r");
$html = fread($fh,filesize("page.htp"));
foreach (array_keys($fill) as $k) {
        $html = preg_replace("/%$k%/",$fill[$k],$html);
}
print $html;

?>
Learn about this subject
This module and example are covered on the following public courses:
 * Learning to program in PHP
 * PHP Programming
Also available on on site courses for larger groups

Books covering this topic
Yes. We have over 700 books in our library. Books covering PHP are listed here and when you've selected a relevant book we'll link you on to Amazon to order.

Other Examples
This example comes from our "Generating CSS through PHP" training module. You'll find a description of the topic and some other closely related examples on the "Generating CSS through PHP" module index page.

Full description of the source code
You can learn more about this example on the training courses listed on this page, on which you'll be given a full set of training notes.

Many other training modules are available for download (for limited use) from our download centre under an Open Training Notes License.

Other resources
• Our Solutions centre provides a number of longer technical articles.
• Our Opentalk forum archive provides a question and answer centre.
The Horse's mouth provides a daily tip or thought.
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• All of these resources can be searched through through our search engine
• And there's a global index here.

Web site author
This web site is written and maintained by Well House Consultants.

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This is a sample program, class demonstration or answer from a training course. It's main purpose is to provide an after-course service to customers who have attended our public private or on site courses, but the examples are made generally available under conditions described below.

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Past attendees on our training courses are welcome to use individual examples in the course of their programming, but must check the examples they use to ensure that they are suitable for their job. Remember that some of our examples show you how not to do things - check in your notes. Well House Consultants take no responsibility for the suitability of these example programs to customer's needs.

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