如果常用微博的话可以发现有个长微博工具，可以将一段文字转成图片，然后发在微博上，比如锤子，长微博工具 www.changweibo.com
这里以 PHP 为例，使用 PHP 来对页面截图。
一个 demo
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error_reporting(7);
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define('ROOT', getcwd());
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define('BASEDIR', parse_url($_SERVER['REQUEST_URI'], PHP_URL_PATH));
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if ($_POST['text']) {
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$ret = array();
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$text = $_POST['text'];
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try {
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$ret['imgurl'] = text2img($text, (array) $_REQUEST['config']);
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}
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catch (Exception $e) {
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$ret['imgurl'] = print_r($e, true);
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}
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echo str_replace('\\/', '/', json_encode($ret));
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exit(0);
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}
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function text2img($text, $options = array())
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{
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//http://yuncode.net/code/c_51dd01a4d547f26
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$rows = substr_count($text, "\n") + 1;
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$font_path = $options['fontfile'] ? $options['fontfile'] : ROOT . '/simhei.ttf';//cp /c/Windows/Fonts/simhei.ttf .
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if (!file_exists($font_path))
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throw new Exception(" 找不到字体文件：$font_path ");
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$font_size = $options['fontsize'] ? $options['fontsize'] : 12;
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$padding = $options['padding'] ? $options['padding'] : 30;
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$row_plus_height = $options['row_plus_height'] ? $options['row_plus_height'] : 4;
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$border = 1;
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$im_width = 430;
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$im_height = ($row_plus_height + ($font_size * 4) / 3) * $rows + ($padding + $border) * 2;
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$im = @imagecreatetruecolor($im_width, $im_height);
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if (!$im)
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throw new Exception("初始化图片失败，请检查 GD 配置");
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imagefilledrectangle($im, $border, $border, ($im_width - 2 * $border), ($im_height - 2 * $border), imagecolorallocate($im, 255, 255, 255));
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imagettftext($im, $font_size, 0, ($border + $padding), (($font_size * 4) / 3 + $border + $padding), imagecolorallocate($im, 0, 0, 0), $font_path, $text);
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$base_path = '/files';
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$base_filename = date("Y-m-d,H-i-s") . '.png';
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$short_filename = $base_path . '/' . $base_filename;
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$short_url = rtrim(BASEDIR, '/') . $short_filename;
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@mkdir(ROOT . $base_path, 0777, true);
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$filename = ROOT . $short_filename;
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if (!imagepng($im, $filename)) {
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throw new Exception("创建图片时出错。");
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}
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@imagedestroy($im);
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return $short_url;
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}
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?>
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<!DOCTYPE HTML><html><head>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
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<title>长微博工具</title>
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<script type="text/javascript" src="http://lib.sinaapp.com/js/jquery/1.6.2/jquery.min.js"></script>
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</head>
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<body>
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<h1>长微博工具</h1>
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<p><textarea name="text" id="text" rows="20" cols="60"></textarea></p>
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<pre id="pre"></pre>
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<p><a target="_blank" href="" id="url"></a></p>
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<p><input type="button" id="format" value="格式化" /><input type="button" id="button" value="生成长微博" /> <br/><br/><br/><br/> <a href="http://changweibo.debake.com/" style="font-size:9px; color:#666; text-decoration:none">长微博</a></p>
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<script type="text/javascript">
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BIG_FONT_WIDTH = 44;
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function f(v,w,c){
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c = 0;
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w = w || BIG_FONT_WIDTH;
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return v.replace(/[\S\s]/g,function(a){
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if(/[\r\n]/.test(a)) {
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c = -2;
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return "\r\n";
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}
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c += /[\x00-\xFF]/.test(a) ? 1 : 2;
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if(c>=w){
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c = 0;
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return "\r\n"+a;
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}
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return a;
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});
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}
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$(function(){
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$("#format").click(function(){$("#text").val(f($("#text").val()));});
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$("#button").click(function(){
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if($("#text").val().length<1){
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alert("无内容");
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} else {
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$.ajax({
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type:"POST",
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url:location.pathname,
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data:"text="+$("#text").val(),
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dataType:"json",
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success:function(m){
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if(m.message)$("#pre").innerHTML(m.message);
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if(m.imgurl)$("#url").attr("href", m.imgurl).text(m.imgurl);
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}
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});
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}
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});
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});
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</script>
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</body>
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</html>
text2pic
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composer require dsgygb/text2pic
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touch test.php
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<?php
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require 'vendor/autoload.php';
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$transform = new Text2pic\Transform('by text2pic');
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$result = $transform->generate("hello world");
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print_r($result);
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#中文字体路径 /c/windows/fonts/sihei.ttf
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$transform=new Text2pic\Transform($by,$uploadsPath,$uploadsUrl,$fontPath);
wkhtmltopdf
地址 https://wkhtmltopdf.org/downloads.html 下载后有 2 个工具 wkhtmltoimage 和 wkhtmltopdf 分别是将网页转图片和pdf 的,具体使用参考 http://blog.csdn.net/qq_14873105/article/details/51394026
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#生成图片 https://gist.github.com/vibbow/5702882
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wkhtmltoimage http://www.baidu.com/ baidu.jpg
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#php 调用 使用绝对路径
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$r=shell_exec("/user/bin/wkhtmltoimage http://www.baidu.com/ baidu.jpg");
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$r=shell_exec("/user/bin/wkhtmltoimage -q {$filename}.html {$filename}.jpg");
phpwkhtmltopdf
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composer require mikehaertl/phpwkhtmltopdf
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require './vendor/autoload.php';
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use mikehaertl\wkhtmlto\Image;
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// You can pass a filename, a HTML string, an URL or an options array to the constructor
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$image = new Image('/path/to/page.html');
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$image->saveAs('/path/to/page.png');//保存
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// ... or send to client for inline display
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$image->send();//浏览器显示
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// ... or send to client as file download
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$image->send('page.png');//浏览器显示并下载
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#另外一个库https://github.com/knplabs/snappy
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use Knp\Snappy\Pdf as newpdf;
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$snappy = new newpdf('wkhtmltopdf');
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header('Content-Type: application/pdf');
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header('Content-Disposition: attachment; filename="file.pdf"');
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// echo $snappy->getOutput('http://www.github.com');
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$snappy->generateFromHtml('<h1>Bill</h1><p>You owe me money, dude.</p>', 'bill-123.pdf');
more
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小人举牌图片生成 https://github.com/jokin1999/HoldUpSign
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网页保存为图片及高清截图的优化https://segmentfault.com/a/1190000011425316
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https://*.com/questions/5663814/how-do-i-get-wkhtmltopdf-to-execute-via-php http://www.jianshu.com/p/4d65857ffe5e