想象一下包含UTF-8中几个单词的任何给定语言(英语,阿拉伯语,日语等)的页面标题字符串.例：

$stringRAW = "Blues & μπλουζ Bliss's ブルース Schön";

现在,这实际上需要转换为该页面的URL的有效部分：

$stringURL = "blues-μπλουζ-bliss-ブルース-schön"

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这也适用于我的服务器！

Q1. What characters are allowed as valid URL these days? I remember having seen whol arabic strings sitting on the browser and i tested it on my apache 2 and all worked fine.

我猜它必须成为：$stringURL =“blues-blows-bliss-black”

Q2. What existing PHP functions do you know that encode/convert these UTF-8 strings correctly for URL ripping them off of any invalid chars?

我至少猜到了：
1.空格应转换成破折号 –
2.删除无效字符？他们是谁？ @和’&’？
3.将所有字母转换为小写(或者是在网址中有效的capitcal字母？)

谢谢：非常感谢您的建议！

$stringURL = str_replace(' ','-',$stringURL); // Converts spaces to dashes
$stringURL = urlencode($stringURL);