syslog

<?

// open syslog, include the process ID and send the log to standard error, and use a user defined logging mechanism

$prefix = "myScriptLog";
$flags = LOG_PID | LOG_PERROR;
$facility = LOG_LOCAL0;

openlog($prefix, $flags, $facility);

    if(authorized_client())
    {
        echo "do something";
    }
    else
    {
        $priority = LOG_WARNING;
        $access = date("Y/m/d H:i:s");
        $message = "unauthorized client: $access {$_SERVER['REMOTE_ADDR']} ({$_SERVER['HTTP_USER_AGENT']})";
        $return = syslog($priority, $message);
        echo $return;
    }

closelog();

?>

<?
$facilities = array(
    LOG_AUTH,
    LOG_AUTHPRIV,
    LOG_CRON,
    LOG_DAEMON,
    LOG_KERN,
    LOG_LOCAL0,
    LOG_LPR,
    LOG_MAIL,
    LOG_NEWS,
    LOG_SYSLOG,
    LOG_USER,
    LOG_UUCP,
);

foreach($facilities as $facility)
{
    $prefix = "test";
    $flags = LOG_PID;
    openlog($prefix, $flags, $facility);
    
    $priority = LOG_ERR;
    $message = $flags . ": " . $facility;
    $return = syslog($priority, $message);

    echo $message . PHP_EOL;

    closelog();
}

?>

1: 32
1: 80
1: 72
1: 24
1: 0
1: 128
1: 48
1: 16
1: 56
1: 40
1: 8
1: 64