function.get_leptoken.php

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<?php
 
// include secure.php to protect this file and the whole CMS!
if(!defined("SEC_FILE")){define("SEC_FILE",'/framework/secure.php' );}
if (defined('LEPTON_PATH')) {   
    include LEPTON_PATH.SEC_FILE;
} else {
    $oneback = "../";
    $root = $oneback;
    $level = 1;
    while (($level < 10) && (!file_exists($root.SEC_FILE))) {
        $root .= $oneback;
        $level += 1;
    }
    if (file_exists($root.SEC_FILE)) { 
        include $root.SEC_FILE;  
    } else {
        trigger_error(sprintf("[ <b>%s</b> ] Can't include secure.php!", $_SERVER['SCRIPT_NAME']), E_USER_ERROR);
    }
}
// end include secure file
 
 
function get_leptoken(): string 
{
    //  [1] -- first $_GET
    $leptoken = filter_input(
        INPUT_GET,
        "leptoken",
        FILTER_VALIDATE_REGEXP,
        [
             "options" => [
                "regexp"    => "~^[a-zA-Z0-9\.]{32}$~",
                "default"   => NULL
             ]
        ]
    );
    //  [2] -- not found - look for the $_POST
    if( NULL === $leptoken )
    {
        $leptoken = filter_input(
            INPUT_POST,
            "leptoken",
            FILTER_VALIDATE_REGEXP,
            [
                 "options" => [
                    "regexp"    => "~^[a-zA-Z0-9\.]{32}$~",
                    "default"   => NULL
                 ]
            ]
        );
    }
    //  [3] --- not found -- look for a diff. name
    if( NULL === $leptoken )
    {
        $leptoken = filter_input(
            INPUT_GET,
            "amp;leptoken",
            FILTER_VALIDATE_REGEXP,
            [
                 "options" => [
                    "regexp"    => "~^[a-zA-Z0-9\.]{32}$~",
                    "default"   => NULL
                 ]
            ]
        );
    }
    
    return ( $leptoken ?? "" );
}