Usernames are used everywhere on the internet. They are what give users a unique identity on their favorite sites. You need to check all the usernames in a database. Here are some simple rules that users have to follow when creating their username. 1) The only numbers in the username have to be at...

\S\/(\/(download|getn|getnum|file)\.php)\?\S*

Finds valid phone numbers, including dashes Valid: 223-444-5555 Invalid:...

Validate the structure of the IP address with suffix of red

in the example, I'm matching all the #tags except *#thankyouburger *. very useful for when you want to strip out all but one tag

2017-06-29\s06:50:(\d+).?([A-Z]+).?(?:\[(.*?+))

Iranian cell phone number pattern to being used in regular expression this work for iranian operator (irancell , Taliya, MCI,RighTel) Irancell and Taliya : 093 , MCI : 091 , RighTel : 092 cheers

How to detect palindromes up to 12 characters in length. I chose 12 because currently, the longest palindrome that is an actual word is "tattarrattat". This was a fun exercise because someone said pcre can't detect palindromes. Check and mate, my good sir.

Matches strings that are formatted as arrays. The following will match: [ 3.4, -600, foo ] ["foo","bar"] [ bar, 1600 ]...