regex to check valid url either http or www
7336
What is the best regular expression to check if a string is a valid URL?
90617
Regular Expression to Extract the Url out of the Anchor Tag
87825
PHP / RegEx - Convert URLs to links by detecting .com/.net/.org/.edu etc
76108
"https://" refers to random site, "http://" is broken, but "http://www" works
8669
Regular Expression for password validation
75281
php - clean URL
121354
is URL valid or not
37
Regular Expression for alphanumeric and underscores
127525
Regular Expression for getting everything after last slash
2559
Is there a regular expression to detect a valid regular expression?
125696
Properly Matching a IDN URL
5769
Extract URLs from text in PHP
73550
Checking if a URL exists or not
99390
Regexp that matches valid regexps
83008
RegEx with multiple groups?
27647
How to check whether a string is a valid HTTP URL?
76864
What is the best way to check if a URL exists in PHP?