php 将未知符号转换为 url 中的已知符号

Question

正在转换 url 中的未知符号，

像这样

https://r4---sn-hgn7zn7r.c.docs.google.com/videoplayback?requiressl\u003dyes\u0026id\u003d376b916e4a3c65b1\u0026itag\u003d22\u0026source\u003dwebdrive\u0026app\u003dtexmex\u0026ip\u003d109.110.116.1\u0026ipbits\u003d8\u0026expire\u003d1456065477\u0026sparams\u003drequiressl%2Cid%2Citag%2Csource%2Cip%2Cipbits%2Cexpire\u0026signature\u003d5C06093099C3B4A7DE28AF323E2E15AC7DE5BEEE.758E1110B23CD41EA7E246DE2564ABE5368431FE\u0026key\u003dck2\u0026mm\u003d30\u0026mn\u003dsn-hgn7zn7r\u0026ms\u003dnxu\u0026mt\u003d1456050981\u0026mv\u003dm\u0026nh\u003dIgpwcjAyLm1yczAyKgkxMjcuMC4wLjE\u0026pl\u003d22

真实link, 像这样

https://r4---sn-hgn7zn7r.c.docs.google.com/videoplayback?requiressl=yes&id=376b916e4a3c65b1&itag=22&source=webdrive&app=texmex&ip=109.110.116.1&ipbits=8&expire=1456065477&sparams=requiressl,id,itag,source,ip,ipbits,expire&signature=5C06093099C3B4A7DE28AF323E2E15AC7DE5BEEE.758E1110B23CD41EA7E246DE2564ABE5368431FE&key=ck2&mm=30&mn=sn-hgn7zn7r&ms=nxu&mt=1456050981&mv=m&nh=IgpwcjAyLm1yczAyKgkxMjcuMC4wLjE&pl=22

我不知道如何转换它，

我用这个网站来转换 link DDecode - Hex,Octal,HTML Decode

Answer 1

似乎是 "Unicode Escape Sequences for Latin 1 Characters"（参见 http://archive.oreilly.com/pub/a/actionscript/excerpts/as3-cookbook/appendix.html）。

快速搜索未在 PHP 中找到任何用于对此进行解码的本机库，但解码您最有可能遇到的需要解码的字符（特别是 & 和 =）应该很简单.

这是 5 年前的 SO 解决方案：How to decode Unicode escape sequences like "\u00ed" to proper UTF-8 encoded characters?

Answer 2

在您的情况下，您必须将 "\uxxxx" 等 unicode 转义序列转换为 utf8 字符。
使用 preg_repalce_callback 函数将所有匹配的转义序列替换为相应的 utf8 字符。
在我们使用的回调函数中 pack function which will pack the initial HEX string to binary string, then it will convert that binary order('UCS-2BE') into UTF-8 equivalent with mb-convert-encoding.

$str = "https://r4---sn-hgn7zn7r.c.docs.google.com/videoplayback?requiressl\u003dyes\u0026id\u003d376b916e4a3c65b1\u0026itag\u003d22\u0026source\u003dwebdrive\u0026app\u003dtexmex\u0026ip\u003d109.110.116.1\u0026ipbits\u003d8\u0026expire\u003d1456065477\u0026sparams\u003drequiressl%2Cid%2Citag%2Csource%2Cip%2Cipbits%2Cexpire\u0026signature\u003d5C06093099C3B4A7DE28AF323E2E15AC7DE5BEEE.758E1110B23CD41EA7E246DE2564ABE5368431FE\u0026key\u003dck2\u0026mm\u003d30\u0026mn\u003dsn-hgn7zn7r\u0026ms\u003dnxu\u0026mt\u003d1456050981\u0026mv\u003dm\u0026nh\u003dIgpwcjAyLm1yczAyKgkxMjcuMC4wLjE\u0026pl\u003d22";

$str = preg_replace_callback('/\\u([0-9a-fA-F]{4})/', function ($match) {
    return mb_convert_encoding(pack('H*', $match[1]), 'UTF-8', 'UCS-2BE');
}, rawurldecode($str));

echo $str;
// the output:
https://r4---sn-hgn7zn7r.c.docs.google.com/videoplayback?requiressl=yes&id=376b916e4a3c65b1&itag=22&source=webdrive&app=texmex&ip=109.110.116.1&ipbits=8&expire=1456065477&sparams=requiressl,id,itag,source,ip,ipbits,expire&signature=5C06093099C3B4A7DE28AF323E2E15AC7DE5BEEE.758E1110B23CD41EA7E246DE2564ABE5368431FE&key=ck2&mm=30&mn=sn-hgn7zn7r&ms=nxu&mt=1456050981&mv=m&nh=IgpwcjAyLm1yczAyKgkxMjcuMC4wLjE&pl=22

http://php.net/manual/en/function.preg-replace-callback.php

php 将未知符号转换为 url 中的已知符号

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