What are some common pitfalls to avoid when implementing subdomains and server redirection in PHP applications?

One common pitfall to avoid when implementing subdomains and server redirection in PHP applications is not properly handling the redirection logic, which can lead to infinite loops or incorrect redirects. To solve this, ensure that you check the current domain before redirecting to a subdomain to prevent redirection loops. 

// Check if the current domain is not already a subdomain
if ($_SERVER['HTTP_HOST'] != 'subdomain.example.com') {
    // Redirect to the subdomain
    header("Location: http://subdomain.example.com");
    exit();
}

Keywords

subdomains server redirection PHP applications DNS configuration htaccess rules

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