一、查看邮件是否已被阅读
当你在发送邮件时,你或许很想知道该邮件是否被对方已阅读。这里有段非常有趣的代码片段能够显示对方IP地址记录阅读的实际日期和时间。
01.<?02.error_reporting(0);03.Header("Content-Type: image/jpeg");04. 05.//Get IP06.if (!emptyempty($_SERVER[‘HTTP_CLIENT_IP‘]))07.{08.$ip=$_SERVER[‘HTTP_CLIENT_IP‘];09.}10.elseif (!emptyempty($_SERVER[‘HTTP_X_FORWARDED_FOR‘]))11.{12.$ip=$_SERVER[‘HTTP_X_FORWARDED_FOR‘];13.}14.else15.{16.$ip=$_SERVER[‘REMOTE_ADDR‘];17.}18. 19.//Time20.$actual_time = time();21.$actual_day = date(‘Y.m.d‘, $actual_time);22.$actual_day_chart = date(‘d/m/y‘, $actual_time);23.$actual_hour = date(‘H:i:s‘, $actual_time);24. 25.//GET Browser26.$browser = $_SERVER[‘HTTP_USER_AGENT‘];27. 28.//LOG29.$myFile = "log.txt";30.$fh = fopen($myFile, ‘a+‘);31.$stringData = $actual_day . ‘ ‘ . $actual_hour . ‘ ‘ . $ip . ‘ ‘ . $browser . ‘ ‘ ."\r\n";32.fwrite($fh, $stringData);33.fclose($fh);34. 35.//Generate Image (Es. dimesion is 1x1)36.$newimage = ImageCreate(1,1);37.$grigio = ImageColorAllocate($newimage,255,255,255);38.ImageJPEG($newimage);39.ImageDestroy($newimage);40. 41.?>
二、从网页中提取关键字
一段伟大的代码片段能够轻松的从网页中提取关键字。
01.$meta = get_meta_tags(‘http://www.emoticode.net/‘);02.$keywords = $meta[‘keywords‘];03.// Split keywords04.$keywords = explode(‘,‘, $keywords );05.// Trim them06.$keywords = array_map( ‘trim‘, $keywords );07.// Remove empty values08.$keywords = array_filter( $keywords );09. 10.print_r( $keywords );
三、查找页面上的所有链接
使用DOM,你可以轻松从任何页面上抓取链接,代码示例如下:
01.$html = file_get_contents(‘http://www.php100.com‘);02. 03.$dom = new DOMDocument();04.@$dom->loadHTML($html);05. 06.// grab all the on the page07.$xpath = new DOMXPath($dom);08.$hrefs = $xpath->evaluate("/html/body//a");09. 10.for ($i = 0; $i < $hrefs->length; $i++) {11.$href = $hrefs->item($i);12.$url = $href->getAttribute(‘href‘);13.echo $url.‘<br />‘;14.}
四、自动转换URL,跳转至超链接
在WordPress中,如果你想自动转换URL,跳转至超链接页面,你可以利用内置的函数make_clickable()执行此操作。如果你想基于WordPress之外操作该程序,那么你可以参考wp-includes/formatting.php源代码。
01.function _make_url_clickable_cb($matches) {02.$ret = ‘‘;03.$url = $matches[2];04. 05.if ( emptyempty($url) )06.return $matches[0];07.// removed trailing [.,;:] from URL08.if ( in_array(substr($url, -1), array(‘.‘, ‘,‘, ‘;‘, ‘:‘)) === true ) {09.$ret = substr($url, -1);10.$url = substr($url, 0, strlen($url)-1);11.}12.return $matches[1] . "<a href=\"$url\" rel=\"nofollow\">$url</a>" . $ret;13.}14. 15.function _make_web_ftp_clickable_cb($matches) {16.$ret = ‘‘;17.$dest = $matches[2];18.$dest = ‘http://‘ . $dest;19. 20.if ( emptyempty($dest) )21.return $matches[0];22.// removed trailing [,;:] from URL23.if ( in_array(substr($dest, -1), array(‘.‘, ‘,‘, ‘;‘, ‘:‘)) === true ) {24.$ret = substr($dest, -1);25.$dest = substr($dest, 0, strlen($dest)-1);26.}27.return $matches[1] . "<a href=\"$dest\" rel=\"nofollow\">$dest</a>" . $ret;28.}29. 30.function _make_email_clickable_cb($matches) {31.$email = $matches[2] . ‘@‘ . $matches[3];32.return $matches[1] . "<a href=\"mailto:$email\">$email</a>";33.}34. 35.function make_clickable($ret) {36.$ret = ‘ ‘ . $ret;37.// in testing, using arrays here was found to be faster38.$ret = preg_replace_callback(‘#([\s>])([\w]+?://[\w\\x80-\\xff\#$%&~/.\-;:=,?@\[\]+]*)#is‘, ‘_make_url_clickable_cb‘, $ret);39.$ret = preg_replace_callback(‘#([\s>])((www|ftp)\.[\w\\x80-\\xff\#$%&~/.\-;:=,?@\[\]+]*)#is‘, ‘_make_web_ftp_clickable_cb‘, $ret);40.$ret = preg_replace_callback(‘#([\s>])([.0-9a-z_+-]+)@(([0-9a-z-]+\.)+[0-9a-z]{2,})#i‘, ‘_make_email_clickable_cb‘, $ret);41. 42.// this one is not in an array because we need it to run last, for cleanup of accidental links within links43.$ret = preg_replace("#(<a( [^>]+?>|>))<a [^>]+?>([^>]+?)</a></a>#i", "$1$3</a>",$ret);44.$ret = trim($ret);45.return $ret;46.}
五、创建数据URL
数据URL可以直接嵌入到HTML/CSS/JS中,以节省大量的 HTTP请求。 下面的这段代码可利用$file轻松创建数据URL。
1.function data_uri($file, $mime) {2.$contents=file_get_contents($file);3.$base64=base64_encode($contents);4.echo "data:$mime;base64,$base64";5.}
六、从服务器上下载&保存一个远程图片
当你在搭建网站时,从远程服务器下载某张图片并且将其保存在自己的服务器上,这一操作会经常用到。代码如下:
1.$image = file_get_contents(‘http://www.php100.com/image.jpg‘);2.file_put_contents(‘/images/image.jpg‘, $image);//Where to save the image
七、移除Remove Microsoft Word HTML Tag
当你使用Microsoft Word会创建许多Tag,比如font,span,style,class等。这些标签对于Word本身而言是非常有用的,但是当你从Word粘贴至网页时,你会发现很多无用的Tag。因此,下面的这段代码可帮助你删除所有无用的Word HTML Tag。
01.function cleanHTML($html) {02./// <summary>03./// Removes all FONT and SPAN tags, and all Class and Style attributes.04./// Designed to get rid of non-standard Microsoft Word HTML tags.05./// </summary>06.// start by completely removing all unwanted tags07. 08.$html = ereg_replace("<(/)?(font|span|del|ins)[^>]*>","",$html);09. 10.// then run another pass over the html (twice), removing unwanted attributes11. 12.$html = ereg_replace("<([^>]*)(class|lang|style|size|face)=("[^"]*"|‘[^‘]*‘|[^>]+)([^>]*)>","<\1>",$html);13.$html = ereg_replace("<([^>]*)(class|lang|style|size|face)=("[^"]*"|‘[^‘]*‘|[^>]+)([^>]*)>","<\1>",$html);14. 15.return $html16.}
八、检测浏览器语言
如果你的网站上有多种语言,那么可以使用这段代码作为默认的语言来检测浏览器语言。该段代码将返回浏览器客户端使用的初始语言。
01.function get_client_language($availableLanguages, $default=‘en‘){02.if (isset($_SERVER[‘HTTP_ACCEPT_LANGUAGE‘])) {03.$langs=explode(‘,‘,$_SERVER[‘HTTP_ACCEPT_LANGUAGE‘]);04. 05.foreach ($langs as $value){06.$choice=substr($value,0,2);07.if(in_array($choice, $availableLanguages)){08.return $choice;09.}10.}11.}12.return $default;13.}
九、显示Facebook 粉丝数量
如果你的网站或者博客上有内链的Facebook页面,你或许想知道拥有多少粉丝。这段代码将帮助你查看Facebook粉丝数,记住,别忘了在你的页面ID第二行添加该段代码。
1.<?php2.$page_id = "YOUR PAGE-ID";3.$xml = @simplexml_load_file("http://api.facebook.com/restserver.php?method=facebook.fql.query&;query=SELECT%20fan_count%20FROM%20page%20WHERE%20page_id=".$page_id."")or die ("a lot");4.$fans = $xml->page->fan_count;5.echo $fans;6.?>原文:http://www.cnblogs.com/redasurc/p/3564020.html