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How to validate domain name in PHP?
The domain name can be validated using the below code in PHP −
Example
<?php
function is_valid_domain_name($domain_name) {
return (preg_match("/^([a-zd](-*[a-zd])*)(.([a-zd](-*[a-zd])*))*$/i", $domain_name) //valid characters check
&& preg_match("/^.{1,253}$/", $domain_name) //overall length check
&& preg_match("/^[^.]{1,63}(.[^.]{1,63})*$/", $domain_name) ); //length of every label
}
?>
$domain_name = 'https://tutorialspoint.com'
is_valid_domain_name($domain_name)Output
This will produce the following output −
$domain_name = 'https://tutorialspoint.com' is_valid_domain_name($domain_name)
In the above code, the ‘preg_match’ function is used to match the domain_name passed as an argument to the user-defined function ‘is_valid_domain_name’.
Updated on: 07-Apr-2020
1K+ Views
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