在PHP中使用Gruber的正则表达式进行URL匹配

Question

how do I get the regex mentioned in this article working with preg_match in php?

<?php
preg_match("\b(([\w-]+://?|www[.])[^\s()<>]+(?:\([\w\d]+\)|([^[:punct:]\s]|/)))/i", $text, $matches);
print_r($matches);
?>

Using the code above I get the following error:

Warning: preg_match() [function.preg-match]: Delimiter must not be alphanumeric or backslash...

Answer 1

Try this:

preg_match("#\b(([\w-]+://?|www[.])[^\s()<>]+(?:\([\w\d]+\)|([^[:punct:]\s]|/)))#i", $text, $matches);

You were missing the regex delimiters (usually / , but using # here because it's more convenient for URLs)