代码：<?php /** * 检测文件的真实类型 * @param string $srcPath 文件路径 * @return string $realType 文件真实类型 */ $imgurl = 'https://ae01.alicdn.com/kf/HTB1w5xdS4TpK1RjSZR0762EwXXa7.png'; echo file_type_detect($imgurl); function file_type_detect($srcPath){ $types = array( 6677 => 'bmp', 7173 => 'gif', 7368 => 'mp3', 13780 => 'png', 255216 => 'jpg', ); $binary = curl_get($srcPath); $bytes = substr($binary, 0, 2); $head = @unpack('C2char', $bytes); $typeCode = intval($head['char1'].$head['char2']); $realType = isset($types[$typeCode]) ? $types[$typeCode] : $typeCode; return $realType; } function curl_get($url){ $ch=curl_init($url); curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false); curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false); curl_setopt($ch, CURLOPT_RETURNTRANSFER, true); curl_setopt($ch, CURLOPT_USERAGENT, 'Mozilla/5.0 (Linux; U; Android 4.4.1; zh-cn; R815T Build/JOP40D) AppleWebKit/533.1 (KHTML, like Gecko)Version/4.0 MQQBrowser/4.5 Mobile Safari/533.1'); curl_setopt($ch, CURLOPT_TIMEOUT, 10); $content=curl_exec($ch); curl_close($ch); return($content); } ?>

HTTP 消息包括客户机向服务器的请求消息和服务器向客户机的响应消息。这两种类型的消息由一个起始行，一个或者多个头域，一个只是头域结束的空行和可选的消息体组成。HTTP 的头域包括通用头，请求头，响应头和实体头四个部分。每个头域由一个域名，冒号（:）和域值三部分组成。一些基本常用的 php 设置 http 请求头定义。可以通过自定义请求头来实现。代码：header('HTTP/1.1 200 OK'); // ok 正常访问 header('HTTP/1.1 404 Not Found'); //通知浏览器 页面不存在 header('HTTP/1.1 301 Moved Permanently'); //设置地址被永久的重定向 301 header('Location: http://4dn.net/'); //跳转到一个新的地址 header('Refresh: 10; url=http://4dn.net/'); //延迟转向 也就是隔几秒跳转 header('X-Powered-By: PHP/6.0.0'); //修改 X-Powered-By信息 header('Content-language: en'); //文档语言 header('Content-Length: 1234'); //设置内容长度 header('Last-Modified: '.gmdate('D, d M Y H:i:s', $time).' GMT'); //告诉浏览器最后一次修改时间 header('HTTP/1.1 304 Not Modified'); //告诉浏览器文档内容没有发生改变 ###内容类型### header('Content-Type: text/html; charset=utf-8'); //网页编码 header('Content-Type: text/plain'); //纯文本格式 header('Content-Type: image/jpeg'); //JPG、JPEG header('Content-Type: application/zip'); // ZIP文件 header('Content-Type: application/pdf'); // PDF文件 header('Content-Type: audio/mpeg'); // 音频文件 header('Content-type: text/css'); //css文件 header('Content-type: text/javascript'); //js文件 header('Content-type: application/json'); //json header('Content-type: application/pdf'); //pdf header('Content-type: text/xml'); //xml header('Content-Type: application/x-shockw**e-flash'); //Flash动画 ###### ###声明一个下载的文件### header('Content-Type: application/octet-stream'); header('Content-Disposition: attachment; filename="ITblog.zip"'); header('Content-Transfer-Encoding: binary'); readfile('test.zip'); ###### ###对当前文档禁用缓存### header('Cache-Control: no-cache, no-store, max-age=0, must-revalidate'); header('Expires: Mon, 26 Jul 1997 05:00:00 GMT'); ###### ###显示一个需要验证的登陆对话框### header('HTTP/1.1 401 Unauthorized'); header('WWW-Authenticate: Basic realm="Top Secret"'); ###### ###声明一个需要下载的xls文件### header('Content-Disposition: attachment; filename=ithhc.xlsx'); header('Content-Type: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet'); header('Content-Length: '.filesize('./test.xls')); header('Content-Transfer-Encoding: binary'); header('Cache-Control: must-revalidate'); header('Pragma: public'); readfile('./test.xls'); ######

为你的网站加上Loading等待加载效果吧 | Loading页面加载添加教程效果图 :教程开始新建一个loading样式css将以下代码放进去 然后引用这个文件#Loadanimation{ background-color:#fff; height:100%; width:100%; position:fixed; z-index:1; margin-top:0px;top:0px; } #Loadanimation-center{ width:100%; height:100%; position:relative; } #Loadanimation-center-absolute{ position:absolute; left:50%; top:50%; height:200px; width:200px; margin-top:-100px; margin-left:-100px; } .xccx_object{ -moz-border-radius:50% 50% 50% 50%; -webkit-border-radius:50% 50% 50% 50%; border-radius:50% 50% 50% 50%; position:absolute; border-left:5px solid #87CEFA; border-right:5px solid #FFC0CB; border-top:5px solid transparent; border-bottom:5px solid transparent; -webkit-animation:animate 2.5s infinite; animation:animate 2.5s infinite; } #xccx_one{ left:75px; top:75px; width:50px; height:50px; } #xccx_two{ left:65px; top:65px; width:70px; height:70px; -webkit-animation-delay:0.1s; animation-delay:0.1s; } #xccx_three{ left:55px; top:55px; width:90px; height:90px; -webkit-animation-delay:0.2s;animation-delay:0.2s; } #xccx_four{ left:45px; top:45px; width:110px; height:110px; -webkit-animation-delay:0.3s; animation-delay:0.3s; } @-webkit-keyframes animate{50%{ -ms-transform:rotate(180deg); -webkit-transform:rotate(180deg); transform:rotate(180deg); } 100%{-ms-transform:rotate(0deg); -webkit-transform:rotate(0deg); transform:rotate(0deg); } } @keyframes animate{50%{ -ms-transform:rotate(180deg); -webkit-transform:rotate(180deg); transform:rotate(180deg); } 100%{ -ms-transform:rotate(0deg); -webkit-transform:rotate(0deg); transform:rotate(0deg); } }第二步：将以下代码填写入头部文件 一般都为 header.php<div id="Loadanimation" style="z-index:999999;"> <div id="Loadanimation-center"> <div id="Loadanimation-center-absolute"> <div class="xccx_object" id="xccx_four"></div> <div class="xccx_object" id="xccx_three"></div> <div class="xccx_object" id="xccx_two"></div> <div class="xccx_object" id="xccx_one"></div> </div> </div> </div> <script> $(function(){ $("#Loadanimation").fadeOut(540); }); </script>注意 注意 fadeOut 里面填写的是毫秒数 本loading可以自定义 网上也有很多css的 只要替换第二步的代码都可以成功(JS代码别替换)