我找不到这个问题的最佳解决方案。这个想法是更改包含特定域的文本的所有 url,并使用preg_replace_callback()
base 64 编码。网址属于这种类型:http://www.domain.com/?fsdf76sf8sf6fds
另一种方式分别是:http://www.otherdomain.com/file/CA60D10F8ACF7CAA
正则表达式的任何想法?
您正在寻找的是类似的东西
$s = preg_replace_callback('#(([a-z]+://)|([a-z]+://)?[a-z0-9.-]+\.|\b)domain.com[^\s]+#i', function($match) {
return base64_encode($match[0]);
}, $string);
这个正则表达式可能有点混乱,所以让我们分解一下:
( -- domain.com must be preceeded by either
([a-z]+://) -- a protocol such as http://
|
([a-z]+://)?[a-z0-9.-]+\. -- possibly a protocol and definitely a subdomain
|
\b -- word-break (prevents otherdomain.com from matching!)
)
domain.com -- the actual domain you're looking for
[^\s]+ -- everything up to the next space (to include path, query string, fragment)
一个非常简单的系统来测试这样的东西:
<?php
$strings = array(
// positives
'a http://www.domain.com/?fsdf76sf8sf6fds z' => 'a xxx z',
'a www.domain.com/?fsdf76sf8sf6fds z' => 'a xxx z',
'a http://domain.com/?fsdf76sf8sf6fds z' => 'a xxx z',
'a domain.com/?fsdf76sf8sf6fds z' => 'a xxx z',
// negatives
'a http://www.otherdomain.com/file/CA60D10F8ACF7CAA z' => null,
'a www.otherdomain.com/file/CA60D10F8ACF7CAA z' => null,
'a http://otherdomain.com/file/CA60D10F8ACF7CAA z' => null,
'a otherdomain.com/file/CA60D10F8ACF7CAA z' => null,
);
foreach ($strings as $string => $result) {
$s = preg_replace_callback('#(([a-z]+://)|([a-z]+://)?[a-z0-9.-]+\.|\b)domain.com[^\s]+#i', function($match) {
return 'xxx';
}, $string);
if (!$result) {
$result = $string;
}
if ($s != $result) {
echo "FAILED: '$string' got '$s'\n";
} else {
echo "OK: '$string'\n";
}
}
(如果您已经在进行单元测试,那么显然可以使用它来代替……)
此答案仅适用于以“http://www.domain.com/”或“https://www.domain.com/”开头的 URL,但更精简:
$in = 'before http://www.domain.com/?fsdf76sf8sf6fds after';
$domain = 'www.domain.com';
echo preg_replace_callback('/\b(https?:\/\/'.preg_quote($domain).'\/)\?(\w+)/i', function($m) {
return 'http://www.otherdomain.com/file/'.base64_encode($m[2]);
}, $in);
// outputs "before http://www.otherdomain.com/file/ZnNkZjc2c2Y4c2Y2ZmRz after"
仍有待解决的一个问题是,您的“CA60D10F8ACF7CAA”示例输出显示的 base64 编码输出与 PHP 的 base64_encode() 返回的输出不同:
echo base64_encode('fsdf76sf8sf6fds'); // outputs ZnNkZjc2c2Y4c2Y2ZmRz