Description:
------------
PASSWORD_HASH does not function into object class.

When we declare one kind of class and these object works with a function that return a string HASHed using, inside this function, the PASSWORD_HASH function, become a wrong functionality when we check hash string with PASSWORD_VERIFY function.
So, using PASSWORD_VERIFY to validate a HASH string, using a object class, returns always FALSE. Only using PASSWORD_HASH directly in the line to generate a HASH works ok, in the objetct class doesn't work.
some type of microtime in the object's instantiation of memory is affecting the HASH generation with the PASSWORD_HASH function inside the LINUX / UNIX OS. This proceeds?


class HashController{
		/**
		* Definição de variáveis privadas - uso interno na classe
		*
		*/
		private $AlgoType = PASSWORD_DEFAULT;
		private $CostOfProcess = ['cost'=>10];
		private $InputString = null;
		private $TargetTimeToGo = 0.1;

		/**
		* fncGetHashString - Gera chave HASH
		*
		* @since 0.1
		* @access public
		* @return string - Criptografia de string do sistema
		*/		
		public function fncGetHashString ($InputString) : String {
			if (empty($InputString)){
				return null;
			} else{ 
				return password_hash($this->InputString, (int)$this->AlgoType, $this->CostOfProcess);
			}
		}
		
		/**
		* fncSetCostOfProcess - Configura a variável privada VCost -  custo de processamento da chave HASH
		*
		* @since 0.1
		* @access public
		* @
		*/		
		public function fncSetCostOfProcess ($Cost) {
			if ((isset($Cost)) && ($Cost > 0)){
				$this->CostOfProcess = ['cost'=>(int)$Cost];
			}			
		}

		/**
		* fncSetAlgoType - Configura a variável privada AlgoType -  tipo algoritmo para hash
		*
		* @since 0.1
		* @access public
		* @
		*/		
		public function fncSetAlgoType ($inAlgoType) {
			if (isset($inAlgoType)) {
				$this->AlgoType = $inAlgoType;
			}			
		}
		
		/**
		* fncBestCostProcess - Gera valor de melhor custo de processamento
		* da chave HASH
		*
		* @since 0.1
		* @access public
		* @return int - Valor do melhor custo encontrado
		*/		
		public function fncBestCostProcess ($InputUserPassword, $inTargetTimeToGo) : int {
			$VCost = 8;
						
			if ((!isset($inTargetTimeToGo)) || (is_null($inTargetTimeToGo))) {
				$inTargetTimeToGo 	= $this->TargetTimeToGo;
			}
			
			do{
				$VCost++;
				$StartTime			= microtime(true);
				password_hash($InputUserPassword, (int)$this->AlgoType, ['cost' => $VCost]);
				$EndTime			= microtime(true);
			} while (($EndTime - $StartTime) < $inTargetTimeToGo);
						
			return $VCost;			
		}
}

Test script:
---------------
class HashController{
		/**
		* Definição de variáveis privadas - uso interno na classe
		*
		*/
		private $AlgoType = PASSWORD_DEFAULT;
		private $CostOfProcess = ['cost'=>10];
		private $InputString = null;
		private $TargetTimeToGo = 0.1;

		/**
		* fncGetHashString - Gera chave HASH
		*
		* @since 0.1
		* @access public
		* @return string - Criptografia de string do sistema
		*/		
		public function fncGetHashString ($InputString) : String {
			if (empty($InputString)){
				return null;
			} else{ 
				return password_hash($this->InputString, (int)$this->AlgoType, $this->CostOfProcess);
			}
		}
		
		/**
		* fncSetCostOfProcess - Configura a variável privada VCost -  custo de processamento da chave HASH
		*
		* @since 0.1
		* @access public
		* @
		*/		
		public function fncSetCostOfProcess ($Cost) {
			if ((isset($Cost)) && ($Cost > 0)){
				$this->CostOfProcess = ['cost'=>(int)$Cost];
			}			
		}

		/**
		* fncSetAlgoType - Configura a variável privada AlgoType -  tipo algoritmo para hash
		*
		* @since 0.1
		* @access public
		* @
		*/		
		public function fncSetAlgoType ($inAlgoType) {
			if (isset($inAlgoType)) {
				$this->AlgoType = $inAlgoType;
			}			
		}
		
		/**
		* fncBestCostProcess - Gera valor de melhor custo de processamento
		* da chave HASH
		*
		* @since 0.1
		* @access public
		* @return int - Valor do melhor custo encontrado
		*/		
		public function fncBestCostProcess ($InputUserPassword, $inTargetTimeToGo) : int {
			$VCost = 8;
						
			if ((!isset($inTargetTimeToGo)) || (is_null($inTargetTimeToGo))) {
				$inTargetTimeToGo 	= $this->TargetTimeToGo;
			}
			
			do{
				$VCost++;
				$StartTime			= microtime(true);
				password_hash($InputUserPassword, (int)$this->AlgoType, ['cost' => $VCost]);
				$EndTime			= microtime(true);
			} while (($EndTime - $StartTime) < $inTargetTimeToGo);
						
			return $VCost;			
		}
}