Questions tagged [posix-ere]
The UNIX/Linux egrep command utilizes the POSIX Extended Regular Expression as its regex flavor of choice.
Forgive my ignorance but regex code is beyond my comprehension. I came across this function in a php module that was not authored by me: function isURL($url = NULL) { if($url == NULL) return false; $protocol = '(http://|https://)'; $allowed ...