1. Preparation elements
1) Replace the font js file
js code:
function com_stewartspeak_replacement() {/* Dynamic Heading Generator By Stewart Rosenberger http://www.stewartspeak.com/headings/ This script searches through a web page for specific or general elements and replaces them with dynamically generated images, in conjunction with a server-side script.*/replaceSelector("h1","dynatext/heading.php",true);//The first two parameters need to be modified var testURL = "dynatext/loading.gif" ;//Modify to the corresponding image path var doNotPrintImages = false;var printerCSS = "replacement-print.css"; var hideFlicker = false;var hideFlickerCSS = "replacement-screen.css";var hideFlickerTimeout = 100;//Responsible modifications can be made here/* -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- further customize this script's abilities, make sure you're familiar with Javascript. And grab a soda or something.*/ var items;var imageLoaded = false;var documentLoaded = false; function replaceSelector(selector,url,wordwrap){ if(typeof items == "undefined") items = new Array(); items[items.length] = {selector: selector, url: url, wordwrap: wordwrap};} if(hideFlicker){ document.write('<link id="hide-flicker" rel="stylesheet" media="screen" href="' + hideFlickerCSS + '" />'); window.flickerCheck = function() { if(!imageLoaded) setStyleSheetState('hide-flicker',false); }; setTimeout('window.flickerCheck();',hideFlickerTimeout)} if(doNotPrintImages) document.write('<link id="print-text" rel="stylesheet" media="print" href="' + printerCSS + '" />'); var test = new Image();test.onload = function() { imageLoaded = true; if(documentLoaded) replacement(); };test.src = testURL + "?date=" + (new Date()).getTime(); addLoadHandler(function(){ documentLoaded = true; if(imageLoaded) replacement(); }); function documentLoad(){ documentLoaded = true; if(imageLoaded) replacement();} function replacement(){ for(var i=0;i<items.length;i++) { var elements = getElementsBySelector(items[i].selector); if(elements.length > 0) for(var j=0;j<elements.length;j++) { if(!elements[j]) continue ; var text = extractText(elements[j]); while(elements[j].hasChildNodes()) elements[j].removeChild(elements[j].firstChild); var tokens = items[i].wordwrap ? text.split(' ') : [text] ; for(var k=0;k<tokens.length;k++) { var url = items[i].url + "?text="+escape(tokens[k]+' ')+"&selector="+escape(items[i].selector); var image = document.createElement("img"); image.className = "replacement"; image.alt = tokens[k] ; image.src = url; elements[j].appendChild(image); } if(doNotPrintImages) { var span = document.createElement("span"); span.style.display = 'none'; span.className = "print-text"; span.appendChild(document.createTextNode(text)); elements[j].appendChild(span); } } } if(hideFlicker) setStyleSheetState('hide-flicker',false);} function addLoadHandler(handler){ if(window.addEventListener) { window.addEventListener("load",handler,false); } else if(window.attachEvent) { window.attachEvent("onload",handler); } else if(window.onload) { var oldHandler = window.onload; window.onload = function piggyback() { oldHandler(); handler(); }; } else { window.onload = handler; }} function setStyleSheetState(id,enabled) { var sheet = document.getElementById(id); if(sheet) sheet.disabled = (!enabled);} function extractText(element){ if(typeof element == "string") return element; else if(typeof element == "undefined") return element; else if(element.innerText) return element.innerText; var text = ""; var kids = element.childNodes; for(var i=0;i<kids.length;i++) { if(kids[i].nodeType == 1) text += extractText(kids[i]); else if(kids[i].nodeType == 3) text += kids[i].nodeValue; } return text;} /* Finds elements on page that match a given CSS selector rule. Some complicated rules are not compatible. Based on Simon Willison's excellent "getElementsBySelector" function. Original code (with comments and description): http://simon.incutio.com/archive/2003/03/25/getElementsBySelector*/function getElementsBySelector(selector){ var tokens = selector.split(' '); var currentContext = new Array(document); for(var i=0;i<tokens.length;i++) { token = tokens[i].replace(/^/s+/,'').replace(//s+$/,''); if(token.indexOf('#') > -1) { var bits = token.split('#'); var tagName = bits[0]; var id = bits[1]; var element = document.getElementById(id); if(tagName && element.nodeName.toLowerCase() != tagName) return new Array(); currentContext = new Array(element); continue; } if(token.indexOf('.') > -1) { var bits = token.split('.'); var tagName = bits[0]; var className = bits[1]; if(!tagName) tagName = '*'; var found = new Array; var foundCount = 0; for(var h=0;h<currentContext.length;h++) { var elements; if(tagName == '*') elements = currentContext[h].all ? currentContext[h].all : currentContext[h].getElementsByTagName('*'); else elements = currentContext[h].getElementsByTagName(tagName); for(var j=0;j<elements.length;j++) found[foundCount++] = elements[j]; } currentContext = new Array; var currentContextIndex = 0; for(var k=0;k<found.length;k++) { if(found[k].className && found[k].className.match(new RegExp('//b'+className+'//b'))) currentContext[currentContextIndex++] = found[k]; } continue; } if(token.match(/^(/w*)/[(/w+)([=~/|/^/$/*]?)=?"?([^/]"]*)"?/]$/)) { var tagName = RegExp.$1; var attrName = RegExp.$2; var attrOperator = RegExp.$3; var attrValue = RegExp.$4; if(!tagName) tagName = '*'; var found = new Array; var foundCount = 0; for(var h=0;h<currentContext.length;h++) { var elements; if(tagName == '*') elements = currentContext[h].all ? currentContext[h].all : currentContext[h].getElementsByTagName('*'); else elements = currentContext[h].getElementsByTagName(tagName); for(var j=0;j<elements.length;j++) found[foundCount++] = elements[j]; } currentContext = new Array; var currentContextIndex = 0; var checkFunction; switch(attrOperator) { case '=': checkFunction = function(e) { return (e.getAttribute(attrName) == attrValue); }; break; case '~': checkFunction = function(e) { return (e.getAttribute(attrName).match(new RegExp('//b'+attrValue+'//b'))); }; break; case '|': checkFunction = function(e) { return (e.getAttribute(attrName).match(new RegExp('^'+attrValue+'-?'))); }; break; case '^': checkFunction = function(e) { return (e.getAttribute(attrName).indexOf(attrValue) == 0); }; break; case '$': checkFunction = function(e) { return (e.getAttribute(attrName).indexOf(attrValue) == 0); }; break; case '$': checkFunction = function(e) { return (e.getAttribute(attrName).lastIndexOf(attrValue) == e.getAttribute(attrName).length - attrValue.length); }; break; case '*': checkFunction = function(e) { return (e.getAttribute(attrName).indexOf(attrValue) > -1); }; break; default : checkFunction = function(e) { return e.getAttribute(attrName); }; } currentContext = new Array; var currentContextIndex = 0; for(var k=0;k<found.length;k++) { if(checkFunction(found[k])) currentContext[currentContextIndex++] = found[k]; } continue; } tagName = token; var found = new Array; var foundCount = 0; for(var h=0;h<currentContext.length;h++) { var elements = currentContext[h].getElementsByTagName(tagName); for(var j=0;j<elements.length; j++) found[foundCount++] = elements[j]; } currentContext = found; } return currentContext;} }// end of scope, execute codeif(document.createElement && document.getElementsByTagName && !navigator.userAgent.match(/opera//?6/i)) com_stewartspeak_replacement();2) Generate the php file of the picture
<?php/* Dynamic Heading Generator By Stewart Rosenberger http://www.stewartspeak.com/headings/ This script generates PNG images of text, written in the font/size that you specify. These PNG images are passed back to the browser. Optionally, they can be cached for later use. If a cached image is found, a new image will not be generated, and the existing copy will be sent to the browser. Additional documentation on PHP's image handling capabilities can be found at http://www.php.net/image/ */$font_file = 'trebuc.ttf' ;//The corresponding xiuga$font_size = 23 ;//The corresponding modifications can be made $font_color = '#000000' ;$background_color = '#ffffff' ;$transparent_background = true ;$cache_images = true ;$cache_folder = 'cache' ;/* -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- ;$send_buffer_size = 4096 ; // check for GD supportif(!function_exists('ImageCreate')) fatal_error('Error: Server does not support PHP image generation') ; // clean up textif(empty($_GET['text'])) fatal_error('Error: No text specified.') ; $text = $_GET['text'] ; if(get_magic_quotes_gpc()) $text = stripslashes($text) ;$text = javascript_to_html($text) ; // look for cached copy, send if it exists$hash = md5(basename($font_file) . $font_size . $font_color . $background_color . $transparent_background . $text) ;$cache_filename = $cache_folder . '/' . $hash . $extension ;if($cache_images && ($file = @fopen($cache_filename,'rb'))){ header('Content-type: ' . $mime_type) ; while(!feof($file)) print(($buffer = fread($file,$send_buffer_size))) ; fclose($file) ; exit ;} // check font availability$font_found = is_readable($font_file) ;if(!$font_found){ fatal_error('Error: The server is missing the specified font.') ;} // create image$background_rgb = hex_to_rgb($background_color) ;$font_rgb = hex_to_rgb($font_color) ;$dip = get_dip($font_file,$font_size) ;$box = @ImageTTFBBox($font_size,0,$font_file,$text) ;$image = @ImageCreate(abs($box[2]-$box[0]),abs($box[5]-$dip)) ;if(!$image || !$box){ fatal_error('Error: The server could not create this heading image.') ;} // allocate colors and draw text$background_color = @ImageColorAllocate($image,$background_rgb['red'], $background_rgb['green'],$background_rgb['blue']) ;$font_color = ImageColorAllocate($image,$font_rgb['red'],$font_rgb['green'],$font_rgb['blue']) ; ImageTTFText($image,$font_size,0,-$box[0],abs($box[5]-$box[3])-$box[1],$font_color,$font_file,$text) ; // set transparentif($transparent_background) ImageColorTransparent($image,$background_color) ; header('Content-type: ' . $mime_type) ;ImagePNG($image) ; // save copy of image for cacheif($cache_images){ @ImagePNG($image,$cache_filename) ;} ImageDestroy($image) ; exit ; /* try to determine the "dip" (pixels dropped below baseline) of this font for this size.*/function get_dip($font,$size){ $test_chars = 'abcdefghijklmnopqrstuvwxyz' . 'ABCDEFGHIJKLMNOPQRSTUVWXYZ' . '1234567890' . '!@#$%^&*()/'"///;.,`~<>[]{}-+_-=' ; $box = @ImageTTFBBox($size,0,$font,$test_chars) ; return $box[3] ;} /* attempt to create an image containing the error message given. if this works, the image is sent to the browser. if not, an error is logged, and passed back to the browser as a 500 code instead.*/function fatal_error($message){ // send an image if(function_exists('ImageCreate')) { $width = ImageFontWidth(5) * strlen($message) + 10 ; $height = ImageFontHeight(5) + 10 ; if($image = ImageCreate($width,$height)) { $background = ImageColorAllocate($image,255,255,255) ; $text_color = ImageColorAllocate($image,0,0,0) ; ImageString($image,5,5,5,$message,$text_color) ; header('Content-type: image/png') ; ImagePNG($image) ; ImageDestroy($image) ; exit ; } } // send 500 code header("HTTP/1.0 500 Internal Server Error") ; print($message) ; exit ;} /* decode an HTML hex-code into an array of R,G, and B values. accepts these formats: (case insensitive) #ffffff, ffffff, #ffff, ffff */ function hex_to_rgb($hex){ // remove '#' if(substr($hex,0,1) == '#') $hex = substr($hex,1) ; // expand short form ('ffff') color if(strlen($hex) == 3) { $hex = substr($hex,0,1) . substr($hex,0,1) . substr($hex,1,1) . substr($hex,1,1) . substr($hex,2,1) ; } if(strlen($hex) != 6) fatal_error('Error: Invalid color "'.$hex.'"') ; // convert $rgb['red'] = hexdec(substr($hex,0,2)) ; $rgb['green'] = hexdec(substr($hex,2,2)) ; $rgb['blue'] = hexdec(substr($hex,4,2)) ; return $rgb ;} /* convert embedded, javascript unicode characters into embedded HTML entities. (eg '%u2018' => '''). returns the converted string.*/function javascript_to_html($text){ $matches = null ; preg_match_all('/%u([0-9A-F]{4})/i',$text,$matches) ; if(!empty($matches)) for($i=0;$i<sizeof($matches[0]);$i++) $text = str_replace($matches[0][$i], '&#'.hexdec($matches[1][$i]).';',$text) ; return $text ;} ?>3) Required fonts
Here you put the required self in the same directory as the js and php files (you can also modify it, but the corresponding file needs to be modified as well)
4) PHP's GD2 library
2. Implemented html code
<?php//load the popup utils library//require_once 'include/popup_utils.inc.php';?><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN""http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd"><html> <head> <title> Professional Search Engine Optimization with PHP: Table of Contents </title> <script type="text/javascript" language="javascript" src="dynatext/replacement.js"></script> </head> <body onload="window.resizeTo(800,600);" onresize='setTimeout("window.resizeTo(800,600);", 100)'> <h1> Professional Search Engine Optimization with PHP: Table of Contents </h1> <?php //display popup navigation only when visitor comes from a SERP // display_navigation(); //display_popup_navigation(); ?> <ol> <li>You: Programmer and Search Engine Marketer</li> <li>A Primer in Basic SEO</li> <li>Provocative SE-Friendly URLs</li> <li>Content Relocation and HTTP Status Codes</li> <li>Duplicate Content</li> <li>SE-Friendly HTML and JavaScript</li> <li>Web Syndication and Social Bookmarking</li> <li>Black Hat SEO</li> <li>Sitemaps</li> <li>Link Bait</li> <li>IP Cloaking, Geo-Targeting, and IP Delivery</li> <li>Foreign Language SEO</li> <li>Coping with Technical Issues</li> <li>Site Clinic: So You Have a Web Site?</li> <li>WordPress: Creating a SE-Friendly Weblog?</li> <li>Introduction to Regular Expression</li> </ol> </body></html>3. Comparison before and after use
Before use
After use