使用PHP编写程序的时候,我们常常想要获取当前页面的URL。下面提供一个用于获取当前页面URL的函数以及使用方法:
示例一:
<?php // 说明:获取完整URL function curPageURL() { $pageURL = 'http'; if ($_SERVER["HTTPS"] == "on") { $pageURL .= "s"; } $pageURL .= "://"; if ($_SERVER["SERVER_PORT"] != "80") { $pageURL .= $_SERVER["SERVER_NAME"] . ":" . $_SERVER["SERVER_PORT"] . $_SERVER["REQUEST_URI"]; } else { $pageURL .= $_SERVER["SERVER_NAME"] . $_SERVER["REQUEST_URI"]; } return $pageURL; } ?>
定义该函数之后就可以直接调用了:
<?php echo curPageURL(); ?>
上面的函数可以获取当前页面完整的URL,即你在浏览器地址栏看到的内容。但是,有时候我们不想要URL中的参数( ? 号后面的内容),如:http://www.ludou.org/hello.html?u=123,只想获取http://www.ludou.org/hello.html,你可以将以上函数按示例二修改。
示例二:
<?php // 说明:获取无参数URL function curPageURL() { $pageURL = 'http'; if ($_SERVER["HTTPS"] == "on") { $pageURL .= "s"; } $pageURL .= "://"; $this_page = $_SERVER["REQUEST_URI"]; // 只取 ? 前面的内容 if (strpos($this_page, "?") !== false) { $this_pages = explode("?", $this_page); $this_page = reset($this_pages); } if ($_SERVER["SERVER_PORT"] != "80") { $pageURL .= $_SERVER["SERVER_NAME"] . ":" . $_SERVER["SERVER_PORT"] . $this_page; } else { $pageURL .= $_SERVER["SERVER_NAME"] . $this_page; } return $pageURL; } ?>
当然也可以采用 $_SERVER['PHP_SELF'] (该变量不返回URL中的参数),
示例三:
<?php // 说明:获取无参数URL function curPageURL() { $pageURL = 'http'; if ($_SERVER["HTTPS"] == "on") { $pageURL .= "s"; } $pageURL .= "://"; if ($_SERVER["SERVER_PORT"] != "80") { $pageURL .= $_SERVER["SERVER_NAME"].":" . $_SERVER["SERVER_PORT"] . $_SERVER['PHP_SELF']; } else { $pageURL .= $_SERVER["SERVER_NAME"] . $_SERVER['PHP_SELF']; } return $pageURL; } ?>
另外,$_SERVER['REQUEST_URI'] 和 $_SERVER['REQUEST_URL'] 是有稍微区别的:
$_SERVER["REQUEST_URI"] 返回完整的路径,包含参数 ( /directory/file.ext?query=string )
$_SERVER['REQUEST_URL'] 只返回文件路径,不包括参数,( /directory/file.ext ),和 $_SERVER['PHP_SELF'] 差不多,只不过在有些服务器上$_SERVER['REQUEST_URL']不可用!
注意:URL使用rewrite规则的时候,$_SERVER['PHP_SELF'] 和 $_SERVER["REQUEST_URL"] 可能不会返回你想要的东西
最后提醒一点,$_SERVER["REQUEST_URI"] 只有 apache 才支持,想要获取$_SERVER['REQUEST_URI'] 值,可以使用以下方案:
<?php // 说明:获取 _SERVER['REQUEST_URI'] 值的通用解决方案 function request_uri() { if (isset($_SERVER['REQUEST_URI'])) { $uri = $_SERVER['REQUEST_URI']; } else { if (isset($_SERVER['argv'])) { $uri = $_SERVER['PHP_SELF'] .'?'. $_SERVER['argv'][0]; } else { $uri = $_SERVER['PHP_SELF'] .'?'. $_SERVER['QUERY_STRING']; } } return $uri; } ?>
再为大家分享两种解决方法:
第一种方法:
<?php /** * 获取当前页面完整URL地址 */ function get_url() { $sys_protocal = isset($_SERVER['SERVER_PORT']) && $_SERVER['SERVER_PORT'] == '443' ? 'https://' : 'http://'; $php_self = $_SERVER['PHP_SELF'] ? $_SERVER['PHP_SELF'] : $_SERVER['SCRIPT_NAME']; $path_info = isset($_SERVER['PATH_INFO']) ? $_SERVER['PATH_INFO'] : ''; $relate_url = isset($_SERVER['REQUEST_URI']) ? $_SERVER['REQUEST_URI'] : $php_self.(isset($_SERVER['QUERY_STRING']) ? '?'.$_SERVER['QUERY_STRING'] : $path_info); return $sys_protocal.(isset($_SERVER['HTTP_HOST']) ? $_SERVER['HTTP_HOST'] : '').$relate_url; } echo get_url(); ?>
第二种方法:
- javascript实现
top.location.href 顶级窗口的地址 this.location.href 当前窗口的地址
- PHP实现
#测试网址: http://localhost/blog/testurl.php?id=5 //获取域名或主机地址 echo $_SERVER['HTTP_HOST']."<br>"; #localhost //获取网页地址 echo $_SERVER['PHP_SELF']."<br>"; #/blog/testurl.php //获取网址参数 echo $_SERVER["QUERY_STRING"]."<br>"; #id=5 //获取用户代理 echo $_SERVER['HTTP_REFERER']."<br>"; //获取完整的url echo 'http://'.$_SERVER['HTTP_HOST'].$_SERVER['REQUEST_URI']; echo 'http://'.$_SERVER['HTTP_HOST'].$_SERVER['PHP_SELF'].'?'.$_SERVER['QUERY_STRING']; #http://localhost/blog/testurl.php?id=5 //包含端口号的完整url echo 'http://'.$_SERVER['SERVER_NAME'].':'.$_SERVER["SERVER_PORT"].$_SERVER["REQUEST_URI"]; #http://localhost:80/blog/testurl.php?id=5 //只取路径 $url='http://'.$_SERVER['SERVER_NAME'].$_SERVER["REQUEST_URI"]; echo dirname($url); #http://localhost/blog
希望本文所述对大家学习php程序设计有所帮助。

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