Search results for: "DNS checks"

What are the best practices for retrieving and displaying user data such as IP address, DNS, and HTTP_REFERER in PHP scripts?

When retrieving and displaying user data such as IP address, DNS, and HTTP_REFERER in PHP scripts, it is important to validate and sanitize the input...

How can DNS entries and Hostheader values be adjusted to make a PHP site externally accessible on an ISS server?

To make a PHP site externally accessible on an IIS server, you need to adjust the DNS entries to point to the server's IP address and configure host h...

What are best practices for checking if a domain is valid and correctly configured in PHP?

When checking if a domain is valid and correctly configured in PHP, you can use the `checkdnsrr()` function to verify if the domain has valid DNS reco...

What are the advantages of using isset() over empty() in PHP server variable checks?

When checking server variables in PHP, it is important to differentiate between isset() and empty(). isset() checks if a variable is set and not null,...

What are the key considerations for accessing and configuring DNS, web server, POP3/IMAP server, and SMTP server settings in PHP scripts for managing email addresses and subdomains?

When managing email addresses and subdomains in PHP scripts, key considerations include properly configuring DNS records to point to the correct serve...