使用 PHP 将所有域（包括子域名）替换为正则表达式

Question

我在 PHP 中使用preg_replace或str_replace替换所有域名，包括www

$string = ' https://example.com, https://www.example.com, https://subdomain.example.com ';
$olddomain= "example.com";
$newdomain = "stackoverflow.com";

$output = str_replace($olddomain, $newdomain, $string);
$output = preg_replace('#(www[.])?[.]' . $olddomain. '#', $newdomain, $body);

echo $output;

我的期望：

https://example.com -> https://stackoverflow.com

https://www.example.com -> https://stackoverflow.com

https://subdomain.example.com -> https://subdomain.example.com

Answer 1

preg_replace 为正则表达式。

$string = ' https://example.com, https://www.example.com, https://subdomain.example.com ';
$olddomain= "example.com";
$newdomain = "stackoverflow.com";

$output = preg_replace('#(https://(www\.)?)' . $olddomain. '#', '$1' . $newdomain, $string);

echo $output;

Output：

https://stackoverflow.com, https://www.stackoverflow.com, https://subdomain.example.com 

Answer 2

不需要正则表达式，只需传递www. 将另一个更改为str_replace() 。 请记住str_replace()接受一组要“更改自”和“更改为”的内容。

$string = ' https://example.com, https://www.example.com, https://subdomain.example.com ';
$olddomain = ["example.com",'www.'];
$newdomain = ["stackoverflow.com", ''];

$output = str_replace($olddomain, $newdomain, $string);
echo $output;

结果

 https://stackoverflow.com, https://stackoverflow.com, https://subdomain.stackoverflow.com 

Answer 3

不使用Regex

$string = ' https://example.com, https://www.example.com, https://subdomain.example.com ';
$olddomain= "example.com";
$newdomain = "stackoverflow.com";

$parts = explode(",", $string);
$new_parts = [];

foreach ($parts as $part) {
    $new_parts[] = str_replace(['https://', 'http://', $olddomain], ['https://', 'http://', $newdomain], $part);
}

$output = implode(",", $new_parts);

echo $output;

返回

https://stackoverflow.com, https://www.stackoverflow.com, https://subdomain.example.com 

Answer 4

使用数组和正则表达式

$string = ' https://example.com, https://www.example.com, https://subdomain.example.com ';
$olddomain = ["example.com", 'www\.'];
$newdomain = ["stackoverflow.com", ''];

$output = preg_replace('#https://(' . implode('|', $olddomain) . ')#', 'https://' . $newdomain[0], $string);
$output = preg_replace('#(' . $olddomain[1] . ')#', $newdomain[1], $output);

echo $output;