How to get output from one observer file to another observer file?

Question

I have two observer file. One event is called for salesrule_validator_process and other observer file is called for sales_quote_collect_totals_after. How to get the result of salesrule_validator_process in sales_quote_collect_totals_after.

Answer 1

If the observers are in the same class, you can save the result in a property, because by default observers are instantiated as singleton. That means, the same object is used in both events:

class Stack_Example_Model_Observer
{
    protected $_result;

    public function validatorProcess($observer)
    {
        $this->_result = ...;
    }

    public function afterTotalsCollect($observer)
    {
        // here you can use $this->_result;
    }
}

Otherwise, you can always use a third class as singleton. Simple example:

class Stack_Example_Model_Result extends Varien_Object
{

}

Usage:

// first observer:
Mage::getSingleton('stack_example/result')->setData('result', $result);

// second observer:
$result = Mage::getSingleton('stack_example/result')->getData('result');

This example result singleton is just a dumb data object, but you could add more meaningful methods or actually process the result there instead of in the observer classes.

Answer 2

Solution 1: If values in different class

You can use magento registry for that

for storing registry you can do as below

Mage::register('my_need', $myvalue);

and getting value

Mage::registry('my_need');

after that unregister registry like below

Mage::unregister('my_need');

Solution 2: if it is in the same class

class1{
protected $_myvariable;
function 1(){
   //set value
  $this->_myvariable  = $myvalue;
}
function 2(){
//fetch Value 
  print_r($this->_myvariable); 

} 
}