How can one troubleshoot the "Call to undefined function phpinfo()" error when testing PHP scripts on a Solaris 8 server?

The "Call to undefined function phpinfo()" error occurs when the phpinfo() function is not recognized by the PHP interpreter on the Solaris 8 server. To solve this issue, you need to ensure that the PHP installation on the server includes the phpinfo() function. This can be done by recompiling PHP with the --enable-info flag or by installing the phpinfo() function separately.

<?php
// Check if phpinfo() function is available
if (function_exists('phpinfo')) {
    phpinfo();
} else {
    echo "phpinfo() function is not available on this server.";
}
?>