Use PHP+JavaScript to convert HTML pages into images-PHP Tutorial-php.cn

这篇文章主要介绍了使用PHP+JavaScript将HTML元素转换为图片的实例分享,文后结果的截图只能体现出替换的字体,也不能说将静态页面转为图片可以加快加载,只是这种做法比较interesting XD需要的朋友可以参考下

1，准备要素

1）替换字体的js文件

js代码：

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);//前两个参数需要修改 var testURL = "dynatext/loading.gif" ;//修改为对应的图片路径 var doNotPrintImages = false; var printerCSS = "replacement-print.css"; var hideFlicker = false; var hideFlickerCSS = "replacement-screen.css"; var hideFlickerTimeout = 100;//这里可以做相应的修改 /* --------------------------------------------------------------------------- For basic usage, you should not need to edit anything below this comment. If you need to 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(''); window.flickerCheck = function() { if(!imageLoaded) setStyleSheetState('hide-flicker',false); }; setTimeout('window.flickerCheck();',hideFlickerTimeout) } if(doNotPrintImages) document.write(''); 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 0) for(var j=0;j -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 -1); }; break; default : checkFunction = function(e) { return e.getAttribute(attrName); }; } currentContext = new Array; var currentContextIndex = 0; for(var k=0;k
        
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2）生成图片的php文件

[]{}-+_-=' ; $box = @ImageTTFBBox($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, #fff, fff */ function hex_to_rgb($hex) { // remove '#' if(substr($hex,0,1) == '#') $hex = substr($hex,1) ; // expand short form ('fff') 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) . 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 $rgb ; } /* convert embedded, javascript unicode characters into embedded HTML entities. (e.g. '%u2018' => '‘'). returns the converted string. */ function javascript_to_html($text) { $matches = null ; preg_match_all('/%u([0-9A-F]{4})/i',$text,$matches) ; if(!empty($matches)) for($i=0;$i

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3）需要的字体

这里将需要的自己放在与js和php文件同在的一个目录下（也可以修改，但是对应文件也要修改）

4）PHP的GD2库

2，实现的html代码

     Professional Search Engine Optimization with PHP: Table of Contents   
   Professional Search Engine Optimization with PHP: Table of Contents 
   You: Programmer and Search Engine Marketer
 A Primer in Basic SEO
 Provocative SE-Friendly URLs
 Content Relocation and HTTP Status Codes
 Duplicate Content
 SE-Friendly HTML and JavaScript
 Web Syndication and Social Bookmarking
 Black Hat SEO
 Sitemaps
 Link Bait
 IP Cloaking, Geo-Targeting, and IP Delivery
 Foreign Language SEO
 Coping with Technical Issues
 Site Clinic: So You Have a Web Site?
 WordPress: Creating a SE-Friendly Weblog?
 Introduction to Regular Expression