What are some strategies for troubleshooting URL redirection issues in PHP?

One common strategy for troubleshooting URL redirection issues in PHP is to check for any errors in the code that handles the redirection. This can include ensuring that the correct headers are being sent, the URL is properly formatted, and any conditions for redirection are met. Additionally, checking for any conflicting redirects or .htaccess rules that may be overriding the PHP redirection can also help resolve the issue.

// Check for any errors in the code that handles the redirection
if ($condition_for_redirection) {
    // Ensure correct headers are being sent
    header("Location: http://example.com/newpage.php");
    exit;
} else {
    // Handle redirection conditions not met
    echo "Redirection conditions not met.";
}