$paymentProcessorList = CRM_Core_PseudoConstant::getPaymentProcessor();
$paymentProcessorList = CRM_Core_PseudoConstant::getPaymentProcessor('name', 'PayPal');This will return a list of all payment processors with the word "PayPal" in their name. Overall, the CRM_Core_PseudoConstant paymentProcessor library provides a convenient and easy-to-use way to manage payment processors in a CRM system, saving developers time and effort in the process.