php过滤文本字符串中的url链接地址$str ="http://4dn.net黑蜘蛛网的网址"; $str1 ="支付宝的网址是HTTPS://www.alipay.com你记住了吗";//https支持，大写支持 $str2 ="http://news.baidu.com百度新闻,过滤url链接"; function removeLinks($str){ if(empty($str))return ''; $str =preg_replace('/(http)(.)*([a-z0-9\-\.\_])+/i','',$str); $str =preg_replace('/(www)(.)*([a-z0-9\-\.\_])+/i','',$str); return $str; } echo removeLinks($str).''; echo removeLinks($str1).''; echo removeLinks($str2).'';

代码：<?php function teacher_curl($url, $paras = array()) { $ch = curl_init(); curl_setopt($ch, CURLOPT_URL, $url); curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false); curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false); if (@$paras['Header']) { $Header = $paras['Header']; } else { $Header[] = "Accept:*/*"; $Header[] = "Accept-Encoding:gzip,deflate,sdch"; $Header[] = "Accept-Language:zh-CN,zh;q=0.8"; $Header[] = "Connection:close"; } curl_setopt($ch, CURLOPT_HTTPHEADER, $Header); if (@$paras['ctime']) { // 连接超时 curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, $paras['ctime']); } else { curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 30); } if (@$paras['rtime']) { // 读取超时 curl_setopt($ch, CURLOPT_TIMEOUT, $paras['rtime']); } if (@$paras['post']) { curl_setopt($ch, CURLOPT_POST, 1); curl_setopt($ch, CURLOPT_POSTFIELDS, $paras['post']); } if (@$paras['header']) { curl_setopt($ch, CURLOPT_HEADER, true); } if (@$paras['cookie']) { curl_setopt($ch, CURLOPT_COOKIE, $paras['cookie']); } if (@$paras['refer']) { if ($paras['refer'] == 1) { curl_setopt($ch, CURLOPT_REFERER, 'http://m.qzone.com/infocenter?g_f='); } else { curl_setopt($ch, CURLOPT_REFERER, $paras['refer']); } } if (@$paras['ua']) { curl_setopt($ch, CURLOPT_USERAGENT, $paras['ua']); } else { curl_setopt($ch, CURLOPT_USERAGENT, "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/65.0.3325.181 Safari/537.36"); } if (@$paras['nobody']) { curl_setopt($ch, CURLOPT_NOBODY, 1); } curl_setopt($ch, CURLOPT_ENCODING, "gzip"); curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); if (@$paras['GetCookie']) { curl_setopt($ch, CURLOPT_HEADER, 1); $result = curl_exec($ch); preg_match_all("/Set-Cookie: (.*?);/m", $result, $matches); $headerSize = curl_getinfo($ch, CURLINFO_HEADER_SIZE); $header = substr($result, 0, $headerSize); //状态码 $body = substr($result, $headerSize); //响应内容 $ret = [ "Cookie" => $matches, "body" => $body, "code" => $header ]; curl_close($ch); return $ret; } $ret = curl_exec($ch); if (@$paras['loadurl']) { $Headers = curl_getinfo($ch); $ret = $Headers['redirect_url']; } curl_close($ch); return $ret; }使用方法文档GET访问echo teacher_curl("http://api.4dn.net/djyule/djyule.php?id=385545");POST访问echo teacher_curl("http://api.4dn.net/djyule/djyule.php",[ 'post'=>[ 'id'=>'385545' ] ]);或echo teacher_curl("http://api.4dn.net/djyule/djyule.php ",[ 'post'=>'id=385545' ]);携带Cookie访问echo teacher_curl("http://api.4dn.net/djyule/djyule.php?id=385545 ",[ 'cookie'=>'cookie内容' ]);模拟访问来源Referecho teacher_curl("http://api.4dn.net/djyule/djyule.php?id=385545 ",[ 'refer'=>'http://api.4dn.net' ]);模拟UseaAgentecho teacher_curl("http://api.4dn.net/djyule/djyule.php?id=385545",[ 'ua'=>'Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/65.0.3325.181 Safari/537.36' ]);文件上传echo teacher_curl("http://api.4dn.net/djyule/djyule.php?id=385545",[ 'post'=>[ 'file'=>new CURLFile(realpath("Curl.jpg")) ] ]);或echo teacher_curl("http://api.4dn.net/djyule/djyule.php?id=385545",[ 'post'=>new CURLFile(realpath("Curl.jpg")) ]);获取301跳转地址echo teacher_curl("https://mmbizurl.cn/s/RNHSo6Dek",[ 'loadurl'=>1 ]);查看返回Header信息echo teacher_curl("http://api.4dn.net/djyule/djyule.php?id=385545",[ 'header'=>1 ]);设置请求头信息echo teacher_curl("http://api.4dn.net/djyule/djyule.php?id=385545",[ 'Header'=>[ 'accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3 accept-encoding: gzip, deflate, br accept-language: zh-CN,zh;q=0.9 cache-control: max-age=0' ] ]);获取POST以后返回的Header、Body、Cookie内容echo teacher_curl("http://api.4dn.net/djyule/djyule.php?id=385545",[ 'post'=>[ 'user'=>123456, 'pwd'=>123 ], 'GetCookie'=>1 ]);

php代码//判断防盗链域名 function is_referer(){ //没有设置防盗链 if(REFERER_URL=='' || (empty($_SERVER['HTTP_REFERER']) && REFERER_ID==1)) return true; //获取来路域名 $uriarr = parse_url($_SERVER['HTTP_REFERER']); $host = $uriarr['host']; $ymarr = explode("|",REFERER_URL); if(in_array($host,$ymarr)){ return true; } return false; }使用方法//防盗链 if(!is_referer()){ echo '非法访问，403~!';exit; }