file_get_contents()失败，URL中带有特殊字符 [英] file_get_contents() fails with special characters in URL

问题描述

我需要从瑞典字母中获取一些包含某些字符的URL.

I have a need to fetch some URL's which have some characters from the Swedish alphabet.

如果您使用诸如https://en.wikipedia.org/wiki/Åland_Islands这样的字符串作为示例，则将其直接作为参数传递到file_get_contents调用中就可以了.但是，如果您首先通过urlencode运行该URL，则调用将失败，并显示以下消息:

If you take an example of such string as https://en.wikipedia.org/wiki/Åland_Islands, passing that straight into the file_get_contents call as a parameter works just fine. But if you run that URL through urlencode first, then the call fails with the message:

无法打开流:没有这样的文件或目录

failed to open stream: No such file or directory

尽管file_get_contents的文档说:

注意:如果您要打开带有特殊字符(例如空格)的URI， 您需要使用urlencode()对URI进行编码.

Note: If you're opening a URI with special characters, such as spaces, you need to encode the URI with urlencode().

例如，如果您运行以下代码:

So for example, if you run the following code:

error_reporting(E_ALL);
ini_set("display_errors", true);

$url = urlencode("https://en.wikipedia.org/wiki/Åland_Islands");

$response = file_get_contents($url);
if($response === false) {
    die('file get contents has failed');
}
echo $response;

您将收到错误.如果您只是从代码中删除"urlencode"，它将正常运行.

You will get the error. If you just remove the "urlencode" from the code, it will run just fine.

我面临的问题是我的URL中有一个参数是从提交的表单中获取的.而且由于PHP始终通过urlencode运行提交的值，所以在我构造的URL中的瑞典语字符将导致错误发生.

The problem I am facing is that there is a parameter in my URL that is taken from a submitted form. And since PHP always runs submitted values through the urlencode, the Swedish characters in my constructed URL will cause the error to happen.

我该如何解决?

推荐答案

该问题很可能是由于urlencode逃避了您的协议​​:

The problem is likely due to urlencode escaping your protocol:

https://en.wikipedia.org/wiki/Åland_Islands
https%3A%2F%2Fen.wikipedia.org%2Fwiki%2F%C3%85land_Islands

这也是我也遇到的问题，只能通过尝试将转义仅针对逃生所需的内容来解决:

This is a problem I have also faced, and could only fix by trying to target the escaping to only what is necessary for escape:

https://en.wikipedia.org/wiki/Åland_Islands
https://en.wikipedia.org/wiki/%C3%85land_Islands    

根据您的角色所在位置，可以想象这很棘手.我通常选择编码补丁程序​​解决方案，但是与我一起工作的某些人更喜欢仅对网址的动态段进行编码.

This is as can be imagined tricky depending on where your characters are located. I usually opt for an encode patch solution, but some people I have worked with prefer to only encode the dynamic segment of their urls.

这是我的方法:

https://en.wikipedia.org/wiki/Åland_Islands
https%3A%2F%2Fen.wikipedia.org%2Fwiki%2F%C3%85land_Islands
https://en.wikipedia.org/wiki/%C3%85land_Islands

代码:

$url = 'https://en.wikipedia.org/wiki/Åland_Islands';
$encodedUrl = urlencode($url);
$fixedEncodedUrl = str_replace(['%2F', '%3A'], ['/', ':'], $encodedUrl);

希望有帮助.

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