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<?php function convert($url) { return preg_replace(':\/\/([^.]*\.)?mydomain\.tld', '://example.dev', $url); } var_dump(convert('http://haha.com/ferfe')); var_dump(convert('https://haha.com/ferfe')); var_dump(convert('http://foo.haha.com/ferfe')); var_dump(convert('https://foo.haha.com/ferfe'));

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