Usage of Zend_Json involves using the two public static methods available: Zend_Json::encode() and Zend_Json::decode().
Zend_Json
Zend_Json::encode()
Zend_Json::decode()
<?php// Retrieve a value:$phpNative = Zend_Json::decode($encodedValue);// Encode it to return to the client:$json = Zend_Json::encode($phpNative);
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Varien