How to create table in magento installation script

$installer = $this;

$installer->startSetup();

$table = $installer->getConnection()
    ->newTable($installer->getTable('wmpayment/webmoney_response'))
    ->addColumn('id', Varien_Db_Ddl_Table::TYPE_INTEGER, null, array(
        'identity' => true,
        'unsigned' => true,
        'nullable' => false,
        'primary'  => true,
    ), 'Id')
    ->addColumn('id_order', Varien_Db_Ddl_Table::TYPE_INTEGER, null, array(
        'unsigned' => true,
        'nullable' => false
    ), 'Id order')
    ->addColumn('response', Varien_Db_Ddl_Table::TYPE_TEXT, null, array(
        'nullable' => false,
    ), 'Response in json format')
    ->addIndex('id_order', 'id_order');
$installer->getConnection()->createTable($table);

How to get magento config value

$value = Mage::getStoreConfig('path/to/config');

Change magento configuration programmatically

$configModel = Mage::getModel('core/config');
$configModel->saveConfig('path/to/config', 'new value');

How to use regex route rewrite in zf1

Just add construction like this to your config file:

resources.router.routes.exhange.type = "Zend_Controller_Router_Route_Regex"
resources.router.routes.exhange.route = "([a-zA-Z0-9]+)-to-([a-zA-Z0-9]+).html"
resources.router.routes.exhange.defaults.module = default
resources.router.routes.exhange.defaults.controller = index
resources.router.routes.exhange.defaults.action = exchange
resources.router.routes.exhange.map.1 = "from"
resources.router.routes.exhange.map.2 = "to"

Then you will be able to use links like: /one-to-two.html, where $_GET['from'] will be "one" and $_GET['to'] - "two".

How to compare float numbers in php

/**
 * Return true if $a equals to $b
 *
 * @param float $a
 * @param float $b
 *
 * @return bool
 */
function isEqualFloat($a, $b)
{
    $epsilon = 0.00001;

    if (abs($a - $b) < $epsilon) {
        return true;
    }

    return false;
}

How to create table in bootstrap

Add this code:

$this->bootstrap('db');
$db = $this->getResource('db');
Zend_Registry::set('db', $db);

after

parent::__construct($application);

in your bootstrap constructor.
And then you can create table:

$tableAuthSession = new Application_Model_DbTable_AuthSession();

How to group WHERE clause in zf1

$db = $this->getAdapter();
$select = $db->select();
$select->from($this->_name);

$select->where('ip = ?', '120.0.0.1');
$select->orWhere('login = ?', 'test');

$subQuery = $select->getPart(Zend_Db_Select::WHERE);
$select->reset(Zend_Db_Select::WHERE);
$select->where(implode(' ', $subQuery));
$select->where('created_at = ?', date('Y-m-d'));

$res = $select->query()->fetchAll();

This will create sql with WHERE clause like as: "((ip = '127.0.0.1') OR (login = 'test')) AND (created_at = '2015-03-24')"