Regular expression for validating web site url
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Now let’s jump into the fun part which is discussing the regular expression First we have the starting and ending slashes “/” , the expression then starts with a “^” sign to match with the beginning of the string.
Notice the [-\s\.] this part matches a hyphen(-) space or a dot (.).[0-9] means 3 digits.
Since I’m mentioning the site, I definitely suggest browsing over to it if you are looking for further reading about regular expressions including sample code and reference material.
Also, have a look at a free online regular expression tool by Derek Slager. $ For starters, you’ll want to make sure that you set your expression to ignore the case, or capital letters in a URL will cause it to fail.