BBCode::Internal_AutoDetectURLs( $string )

function Internal_AutoDetectURLs($string) {
$output = preg_split("/( (?:
(?:https?|ftp) : \\/*
(?:
(?: (?: [a-zA-Z0-9-]{2,} \\. )+
(?: arpa | com | org | net | edu | gov | mil | int | [a-z]{2}
| aero | biz | coop | info | museum | name | pro
| example | invalid | localhost | test | local | onion | swift ) )
| (?: [0-9]{1,3} \\. [0-9]{1,3} \\. [0-9]{1,3} \\. [0-9]{1,3} )
| (?: [0-9A-Fa-f:]+ : [0-9A-Fa-f]{1,4} )
)
(?: : [0-9]+ )?
(?! [a-zA-Z0-9.:-] )
(?:
\\/
[^&?#\\(\\)\\[\\]\\{\\}<>\\'\\\"\\x00-\\x20\\x7F-\\xFF]*
)?
(?:
[?#]
[^\\(\\)\\[\\]\\{\\}<>\\'\\\"\\x00-\\x20\\x7F-\\xFF]+
)?
) | (?:
(?:
(?: (?: [a-zA-Z0-9-]{2,} \\. )+
(?: arpa | com | org | net | edu | gov | mil | int | [a-z]{2}
| aero | biz | coop | info | museum | name | pro
| example | invalid | localhost | test | local | onion | swift ) )
| (?: [0-9]{1,3} \\. [0-9]{1,3} \\. [0-9]{1,3} \\. [0-9]{1,3} )
)
(?: : [0-9]+ )?
(?! [a-zA-Z0-9.:-] )
(?:
\\/
[^&?#\\(\\)\\[\\]\\{\\}<>\\'\\\"\\x00-\\x20\\x7F-\\xFF]*
)?
(?:
[?#]
[^\\(\\)\\[\\]\\{\\}<>\\'\\\"\\x00-\\x20\\x7F-\\xFF]+
)?
) | (?:
[a-zA-Z0-9._-]{2,} @
(?:
(?: (?: [a-zA-Z0-9-]{2,} \\. )+
(?: arpa | com | org | net | edu | gov | mil | int | [a-z]{2}
| aero | biz | coop | info | museum | name | pro
| example | invalid | localhost | test | local | onion | swift ) )
| (?: [0-9]{1,3} \\. [0-9]{1,3} \\. [0-9]{1,3} \\. [0-9]{1,3} )
)
) )/Dx", $string, -1, PREG_SPLIT_DELIM_CAPTURE);
if (count($output) > 1) {
$is_a_url = false;
foreach ($output as $index => $token) {
if ($is_a_url) {
if (preg_match("/^[a-zA-Z0-9._-]{2,}@/", $token)) {
$url = "mailto:" . $token;
}
else if (preg_match("/^(https?:|ftp:)\\/*([^\\/&?#]+)\\/*(.*)\$/", $token, $matches)) {
$url = $matches[1] . '/' . '/' . $matches[2] . "/" . $matches[3];
}
else {
preg_match("/^([^\\/&?#]+)\\/*(.*)\$/", $token, $matches);
$url = "http:/" . "/" . $matches[1] . "/" . $matches[2];
}
$params = @parse_url($url);
if (!is_array($params)) $params = Array();
$params['url'] = $url;
$params['link'] = $url;
$params['text'] = $token;
$output[$index] = $this->FillTemplate($this->url_pattern, $params);
}
$is_a_url = !$is_a_url;
}
}
return $output;
}