Domain Name Validation Regex Php. The domain name can be validated using the below code in PHP Example Live Demo. You could also change the minimum character and maximum character to any number you like.
Check host exist else path assign to host ifisseturlpartshost urlpartshost urlpartspath. Its the name validation regex built into your form that has failed them. However if match is set to false then validation will fail if the input string does match this pattern.
However you can go even further and specify a pattern that a username or email address has to follow in order to be considered valid.
Domain Name Regular Expression Pattern -A-Za-z0-9-163. Lets say you want to make sure that usernames are only alphanumeric. This is handy PHP regex to validate username consist of alpha-numeric a-z A-Z 0-9 underscores and has minimum 5 character and maximum 20 character. Domain dns validation provides free dns health check service which analyzes the dns parameters to check if it meets the quality standard.