User Agents: OPAWG regexes unicode usage must be adjusted

[eteubert]

Some regexes contain unicode characters, like this one: "^Podcast\u2019ler\/.*\\(.*\\)"

That results in an error:

php > echo preg_match("/^Podcast\u2019ler\/.*\\(.*\\)/", "Podcast’ler/1 (2)");

Warning: preg_match(): Compilation failed: PCRE2 does not support \F, \L, \l, \N{name}, \U, or \u at offset 10 in php shell code on line 1

The regexes must be converted to be PCRE2 compatible:

php > echo preg_match("/^Podcast\x{2019}ler\/.*\\(.*\\)/u", "Podcast’ler/1 (2)");
1

1. convert \u2019 to \x{2019} (or any other unicode reference)
2. append the u modifier at the end

Fix should probably be applied around here

podlove-publisher/lib/model/user_agent.php

Lines 43 to 48 in 353fbcc

	foreach ($item->user_agents as $regex) {
	$compiled_regex = str_replace('/', '\/', $regex);
	if (preg_match("/{$compiled_regex}/", $user_agent_string) === 1) {
	return $item;
	}
	}

where the regexes are "compiled".