What potential issues can arise if using $REMOTEADDR instead of $_SERVER['REMOTE_ADDR'] to retrieve the IP address in PHP?

Using $REMOTEADDR instead of $_SERVER['REMOTE_ADDR'] can lead to security vulnerabilities as $REMOTEADDR is not a predefined server variable in PHP and could potentially be manipulated by a malicious user. To ensure the correct and secure retrieval of the IP address, it is recommended to use $_SERVER['REMOTE_ADDR']. 

$ip_address = $_SERVER['REMOTE_ADDR'];

Keywords

$REMOTEADDR $_SERVER['REMOTE_ADDR'] IP address security vulnerability PHP

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