src/OaiPmh/StateManager.php
public function loadDate()
    {
        return (file_exists($this->lastHarvestFile))
            ? trim(current(file($this->lastHarvestFile))) : null;
    }
public function loadDate()
    {
        return (file_exists($this->lastHarvestFile))
            ? trim(current(file($this->lastHarvestFile))) : null;
    }
public function loadDate ( ) { return ( file_exists ( $ this -> lastHarvestFile ) ) ? trim ( current ( file ( $ this -> lastHarvestFile ) ) ) : null ; }
Retrieve the date from the "last harvested" file and use it as our start
date if it is available.

@return string
Retrieve the date from the last harvested file and use it as our start date if it is available .