我在wordpress应用程序中尝试用php进行简单的str\\u替换时遇到了一个非常奇怪的问题。

我正在尝试使用wordpress函数创建图像路径，以获取站点路径和资源路径。下面是我尝试过的3种方法，都给出了我不理解的结果。

原始方法：（这在我自己的localhost上运行，但在prod中，管理端为前端提供了不同的$fullpath）

$site_url = get_site_url();
$homepath = get_home_path();
$filepath = str_replace($site_url.\'/\', \'\', $attachment->image_src_large[0]);
$fullpath = $homepath.$filepath;

前端的输出为$fullpath

string(114) "/usr/www/users/currentuser/wp-content/uploads/2017/10/image1-2962-1024x684.jpg"

但在Admin End was中时（请注意双正斜杠）

string(114) "/usr/www/users/currentuser//wp-content/uploads/2017/10/image1-2962-1024x684.jpg"

我注意到在生产服务器上$attachment->image_src_large[0] 没有像在dev服务器上那样包含域。因此，考虑到这一点，为了解决管理端的双斜杠问题，我尝试了许多方法，详情如下-这是事情开始变得有点奇怪的时候：

2.

$site_url = get_site_url();
$homepath = get_home_path();
$filepath = $attachment->image_src_large[0];
$fullpath = str_replace("//", "/", $homepath.$filepath);

//var_dumps Give
//FRONT END
//$attachment->image_src_large[0] - string(89) "/wp-content/uploads/2017/10/image1-2962-1024x684.jpg" 
//$filepath - string(114) "/usr/www/users/currentuser/https:/www.currentdomain.co.za/wp-content/uploads/2017/10/image1-2962-1024x684.jpg" 

//ADMIN (Gave http instead of https)
//$attachment->image_src_large[0] - string(84) "/wp-content/uploads/2017/10/image1-2962-1024x684.jpg" 
//$filepath - string(109) "/usr/www/users/currentuser/http:/currentdomain.co.za/wp-content/uploads/2017/10/image1-2962-1024x684.jpg"

$site_url = get_site_url();
$homepath = get_home_path();
$filepath = str_replace(\'/\', \'\', $attachment->image_src_large[0]);
$fullpath = $homepath.$filepath;

//var_dumps Give
//$attachment->image_src_large[0] - string(51) "/wp-content/uploads/2017/10/image1-1024x684.jpg"
//$filepath - NULL

3。

$site_url = get_site_url();
$homepath = get_home_path();
$filepath = $attachment->image_src_large[0];
$fullpath = $homepath.$filepath;
$finalpath = str_replace("//", "/", $fullpath);

$fullpath - string(115) "/usr/www/users/currentuser//wp-content/uploads/2017/10/image-1-1024x684.jpg" 
$finalpath - string(114) "/usr/www/users/currentuser/https:/www.currentdomain.co.za/wp-content/uploads/2017/10/image-1-1024x684.jpg"

奇怪的是$finalpath字符串与$fullpath sting的大小，看起来str\\u replace可以工作，但当php读取字符串时，它会替换/使用域

4、尝试转义要插入的正斜杠

...
$finalpath = str_replace("//", "\\/", $fullpath);

//$fullpath - string(110) "/usr/www/users/currentuser//wp-content/uploads/2017/10/image-1-1024x684.jpg" 
//$finalpath - string(110) "/usr/www/users/currentuser/http:\\/currentdomain.co.za/wp-content/uploads/2017/10/image-1-1024x684.jpg" 

我搞不懂这个！如果有人能帮忙，我将不胜感激！

$filepath = str_replace($site_url.\'/\', \'\', $attachment->image_src_large[0]);

$site_url = get_site_url();
  if (strpos($site_url, \'https\') !== false){
    $ssl_site_url = $site_url;
    $plain_site_url = str_replace("https", "http", $site_url);
    } else {
    $plain_site_url = $site_url;
    $ssl_site_url = str_replace("http", "https", $site_url);
    }