URL from button in ACP

 
function myModule_init(){
    // Adds the Back Office Login tab
    jrCore_register_module_feature('jrCore','admin_tab','myModule','backoffice','Back Office Login');
    return true;
}

<?php

// Retrieve the value of the 'store_url' setting
$store_url = jrCore_get_setting('myModule', 'store_url');

// Check if the URL is valid before using it
if (filter_var($store_url, FILTER_VALIDATE_URL) === false) {
    // Handle invalid URL (e.g., display an error message)
    echo 'Invalid Back Office URL';
    exit();
}

// Redirect to the BackOffice URL
header('Location: ' . $store_url);
exit();

    $_tmp = array(
        'name'     => 'store_url',
        'default'  => '',
        'type'     => 'text',
        'validate' => 'url',
        'label'    => 'Store URL',
        'help'     => 'Enter the Store URL',
        'order'    => 1
    );
    jrCore_register_setting('myModule', $_tmp);

<?php
// Redirect to another website
$redirect_url = 'https://store.mysite.com/login?back=my-account';
header('Location: ' . $redirect_url);
exit(); // Make sure to exit after sending the header to ensure the script stops executing

<?php
// Redirect to another website
// $redirect_url = 'https://store.mysite.com/login?back=my-account';

$redirect_url = $_conf['myModule_store_url'] ;


header('Location: ' . $redirect_url);
exit(); // Make sure to exit after sending the header to ensure the script stops executing


and i also tried... 

$redirect_url = jrCore_get_setting('myModule', 'store_url');

<?php
function myModule_redirect() {
    // Retrieve the value of the 'store_url' setting
    $myModule_store_url = jrCore_get_setting('myModule', 'store_url');

    // Check if the URL is valid before using it
    if (filter_var($myModule_store_url, FILTER_VALIDATE_URL) === false) {
        // Handle invalid URL (e.g., display an error message)
        echo 'Invalid Store URL';
        exit();
    }

    // Redirect to the store URL
    header('Location: ' . $myModule_store_url);
    exit();
}

 $_temp = jrCore_db_get_item('xxFoo', $id);

jrCore_register_module_feature('jrCore', 'tool_view', 'jrDeveloper', jrCore_get_base_url() . "/modules/jrDeveloper/adminer.php", array('Database Admin', 'Browse your Database Tables - <b>carefully!</b>'));