protected static function _linkifyRegex($text)
{
$urlPattern = '/ # Rev:20100913_0900 github.com\\/jmrware\\/LinkifyURL
# Match http & ftp URL that is not already linkified
# Alternative 1: URL delimited by (parentheses).
(\\() # $1 "(" start delimiter.
((?:ht|f)tps?:\\/\\/[a-z0-9\\-._~!$&\'()*+,;=:\\/?#[\\]@%]+) # $2: URL.
(\\)) # $3: ")" end delimiter.
| # Alternative 2: URL delimited by [square brackets].
(\\[) # $4: "[" start delimiter.
((?:ht|f)tps?:\\/\\/[a-z0-9\\-._~!$&\'()*+,;=:\\/?#[\\]@%]+) # $5: URL.
(\\]) # $6: "]" end delimiter.
| # Alternative 3: URL delimited by {curly braces}.
(\\{) # $7: "{" start delimiter.
((?:ht|f)tps?:\\/\\/[a-z0-9\\-._~!$&\'()*+,;=:\\/?#[\\]@%]+) # $8: URL.
(\\}) # $9: "}" end delimiter.
| # Alternative 4: URL delimited by <angle brackets>.
(<|&(?:lt|\\#60|\\#x3c);) # $10: "<" start delimiter (or HTML entity).
((?:ht|f)tps?:\\/\\/[a-z0-9\\-._~!$&\'()*+,;=:\\/?#[\\]@%]+) # $11: URL.
(>|&(?:gt|\\#62|\\#x3e);) # $12: ">" end delimiter (or HTML entity).
| # Alt. 5: URL not delimited by (), [], {} or <>.
( # $13: Prefix proving URL not already linked.
(?: ^ # Can be a beginning of line or string, or
| [^=\\s\'"\\]] # a non-"=", non-quote, non-"]", followed by
) \\s*[\'"]? # optional whitespace and optional quote;
| [^=\\s]\\s+ # or... a non-equals sign followed by whitespace.
) # End $13. Non-prelinkified-proof prefix.
(\\b # $14: Other non-delimited URL.
(?:ht|f)tps?:\\/\\/ # Required literal http, https, ftp or ftps prefix.
[a-z0-9\\-._~!$\'()*+,;=:\\/?#[\\]@%]+ # All URI chars except "&" (normal*).
(?: # Either on a "&" or at the end of URI.
(?! # Allow a "&" char only if not start of an...
&(?:gt|\\#0*62|\\#x0*3e); # HTML ">" entity, or
| &(?:amp|apos|quot|\\#0*3[49]|\\#x0*2[27]); # a [&\'"] entity if
[.!&\',:?;]? # followed by optional punctuation then
(?:[^a-z0-9\\-._~!$&\'()*+,;=:\\/?#[\\]@%]|$) # a non-URI char or EOS.
) & # If neg-assertion true, match "&" (special).
[a-z0-9\\-._~!$\'()*+,;=:\\/?#[\\]@%]* # More non-& URI chars (normal*).
)* # Unroll-the-loop (special normal*)*.
[a-z0-9\\-_~$()*+=\\/#[\\]@%] # Last char can\'t be [.!&\',;:?]
) # End $14. Other non-delimited URL.
/imx';
$urlReplace = '$1$4$7$10$13<a href="$2$5$8$11$14">$2$5$8$11$14</a>$3$6$9$12';
return preg_replace($urlPattern, $urlReplace, $text);
}
