PHP无法获取Referer有关问题排查
PHP无法获取Referer问题排查
测试结果:
同一个页面,2次打开,第一次能获取到Referer第二次获取不到,很好奇原因所在。
test1.php代码是:
<?phpecho <span class="str">'测试来源:直接载入页面<br/>'</span>;echo <span class="str">'<a href="test_cookie.php">进入页面</a><br/>'</span>;echo <span class="str">'测试来源:新窗口打开<br/>'</span>;echo <span class="str">'<a target="_blank" href="test_cookie.php">进入页面</a><br/>'</span>;
test_cookie.php的代码为:
<?phpdate_default_timezone_set(<span class="str">'Asia/Shanghai'</span>);<span class="rem">//设置默认时区</span>header(<span class="str">'content-type:text/html; charset=utf8'</span>);<span class="rem">//设置返回头信息</span>echo date(<span class="str">'Y-m-d H:i:s'</span>);echo <span class="str">"<br/>\r\n"</span>;echo <span class="str">'PHP获取Refer是:'</span>;$refer=isset($_SERVER[<span class="str">'HTTP_REFERER'</span>])?$_SERVER[<span class="str">'HTTP_REFERER'</span>]:<span class="str">'No refer found'</span>;echo $refer;echo <span class="str">"<br/>\r\n"</span>;echo <span class="str">'JS获取Refer是:'</span>; echo <span class="str">"<script>document.writeln(document.referrer);</script>"</span>;echo <span class="str">"<br/>\r\n"</span>;
极度好奇是什么原因造成的第一次能获取,第二次不能获取。
环境是LNMPA,官方是http://lnmp.org/lnmpa.html
Mac下用charles抓包
2次请求test1.php的header是一致的。
2次请求test_cookie.php的header是一致的。
那么问题来了,什么原因造成的2次完全一模一样的请求,PHP取不到refer。跪求解。
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