How can changing the domain name impact the functionality of PHP code?

Changing the domain name can impact the functionality of PHP code if the code relies on specific URLs or paths that are tied to the old domain. To solve this issue, you can use PHP's built-in functions like `str_replace` to dynamically update URLs and paths based on the new domain name. 

// Example code to update URLs with the new domain name
$old_domain = 'old-domain.com';
$new_domain = 'new-domain.com';

// Update URLs in a string
$content = 'Visit my website at http://old-domain.com';
$content = str_replace($old_domain, $new_domain, $content);

echo $content;

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domain name PHP code functionality impact change

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