<?php
/*
Checking if the script was called directly
*/
if(!isset($_SERVER['REDIRECT_STATUS'])) {
    exit;
}

/*
Output buffering for silent behaviour
*/
ob_start();

/*
Cleaning after mod_rewrite
*/
$LPV_VAR_MAPPING = array(
    'LPV_FILENAME' => 'SCRIPT_FILENAME',
    'LPV_PATH' => 'PATH_INFO',
);
foreach($LPV_VAR_MAPPING as $from=>$into) {
    if(isset($_SERVER['REDIRECT_'.$from])) {
        $_SERVER[$into] = $_SERVER['REDIRECT_'.$from];
        if(isset($$into)) {
            $$into = $_SERVER[$into];
        }
        unset($_SERVER['REDIRECT_'.$from]);
        if(isset(${'REDIRECT_'.$from})) {
            unset(${'REDIRECT_'.$from});
        }
        unset($_SERVER[$from]);
        if(isset(${$from})) {
            unset(${$from});
        }
    }
}
if(empty($_SERVER['PATH_INFO'])) {
    $_SERVER['PATH_TRANSLATED'] = $_SERVER['SCRIPT_FILENAME'];
} else {
    $_SERVER['PATH_TRANSLATED'] = $_SERVER['DOCUMENT_ROOT'].$_SERVER['PATH_INFO'];
}
if(isset($PATH_TRANSLATED)) {
    $PATH_TRANSLATED = $_SERVER['PATH_TRANSLATED'];
}
$_SERVER['SCRIPT_NAME'] = substr($_SERVER['REDIRECT_URL'], 0, strlen($_SERVER['REDIRECT_URL'])-strlen($_SERVER['PATH_INFO']));
$_SERVER['PHP_SELF'] = $_SERVER['SCRIPT_NAME'].$_SERVER['PATH_INFO'];
if(isset($SCRIPT_NAME)) {
    $SCRIPT_NAME = $_SERVER['SCRIPT_NAME'];
}
if(isset($PHP_SELF)) {
    $PHP_SELF = $_SERVER['PHP_SELF'];
}
foreach($_SERVER as $key=>$value) {
    if(strpos($key,'REDIRECT_')===0) {
        if(isset(${$key})) {
            unset(${$key});
        }
        unset($_SERVER[$key]);
    }
}

/*
Setting proper include_path (reusing $LPV_VAR_MAPPING variable)
*/
$LPV_VAR_MAPPING = PATH_SEPARATOR.ini_get('include_path').PATH_SEPARATOR;
$LPV_VAR_MAPPING = str_replace(
    PATH_SEPARATOR.'.'.PATH_SEPARATOR,
    PATH_SEPARATOR.dirname($_SERVER['SCRIPT_FILENAME']).PATH_SEPARATOR,
    $LPV_VAR_MAPPING
);
ini_set('include_path', substr($LPV_VAR_MAPPING, 1, strlen($LPV_VAR_MAPPING)-2));
chdir(dirname($_SERVER['SCRIPT_FILENAME']));

/*
Logging and/or processing the suspisious request (I don't recommend using e-mail for this, it's just an example)
*/
mail(
    'you@example.com',
    'LPV at '.$_SERVER['SERVER_NAME'].' ('.date('Y-m-d H:i:s').')',
    $_SERVER['REQUEST_URI']."\r\n"
        .'requested from '.$_SERVER['REMOTE_ADDR']."\r\n"
        .date('Y-m-d H:i:s')."\r\n"
        ."\r\n--==[ DUMP ]==--\r\n\r\n"
        .(function_exists('apache_request_headers')?('Headers '.var_export(apache_request_headers(), true)."\r\n"):'')
        .'POST '.var_export($_POST, true)."\r\n"
        .'SERVER '.var_export($_SERVER, true)."\r\n"
    ,
    'From: lpv@'.$_SERVER['SERVER_NAME']
);

/*
Cleaning after self
*/
unset($LPV_VAR_MAPPING);

/*
Cleaning output buffer
*/
ob_end_clean();

/*
Including requested file (this mess should be rewritten...)
*/
function LPV_IsPHPFile($file) {
    $pinfo = pathinfo($file);
    if($pinfo['extension']=='php') {
        return true;
    }
    return false;
}

if(
    strtolower($_SERVER['SCRIPT_FILENAME'])!=strtolower(__FILE__)
    && strpos($_SERVER['SCRIPT_FILENAME'],'..')===false
) {
    if(is_file($_SERVER['SCRIPT_FILENAME'])) {
        if(LPV_IsPHPFile($_SERVER['SCRIPT_FILENAME'])) {
            include($_SERVER['SCRIPT_FILENAME']);
        } else {
            readfile($_SERVER['SCRIPT_FILENAME']);
        }
    } elseif(is_dir($_SERVER['SCRIPT_FILENAME']) && is_file($_SERVER['SCRIPT_FILENAME'].'/index.php')) {
        include($_SERVER['SCRIPT_FILENAME'].'/index.php');
    } elseif(is_dir($_SERVER['SCRIPT_FILENAME']) && is_file($_SERVER['SCRIPT_FILENAME'].'/index.html')) {
        readfile($_SERVER['SCRIPT_FILENAME'].'/index.html');
    }
}
exit;
?>