php - What are these mysterious things in defining methods? -


back development after spending years in management position, dealing php code, has definitions cannot understand (looks far beyond of php progress on these years). can let me know campaigndto , paramdto in definition?

what returned method? 

/**  * creates campaign  * @param campaigndto $campaign  * @param paramdto $param  * @throws \exception  * @return campaigndto  */ public function createcampaign(campaigndto $campaign, paramdto $param) { }

type declarations per docs:

type declarations allow functions require parameters of type @ call time. if given value of incorrect type, error generated: in php 5, recoverable fatal error, while php 7 throw typeerror exception.


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