面向PHP对象的“严格标准：仅变量应通过引用传递给”

Question

So I have read too many of this questions already, and have also read PHP: Passing by reference manual and still cannot figure out why I am seeing this.

So I have a PHP Class

class ProfileTranslator extends EntityTranslator {

    public function getProfile($identifier) {
        try {
            $stmt = $this->dbConn->prepare("CALL get_profile(?)");            
            $stmt->bindParam(1, $identifier, \PDO::PARAM_STR);
            $stmt->execute();
            $rows = $stmt->fetchAll(\PDO::FETCH_ASSOC);
            unset($stmt);
            $count = count($rows);
            if ($count == 1) {
                $row = $rows[0];
                $profile = new entity\Profile();
                $this->assignProfileData($row, $profile);

                // more stuff below...

    }


    private function assignProfileData($row, $profile) {
        $profile->setProfileId($row['profileid']);
        // do some more ->setXYZ's()
        $this->getAccount($profile); // GETTING ERROR HERE (THIS IS LINE 119)
    }

    private function getAccount($profile) {
        // get the account stuff here
    }
}

Error:

( ! ) Strict standards: Only variables should be passed by reference in ProfileTranslator.php on line 119

What is the problem with this code? Isn't $profile a variable?

Answer 1

$profile is a variable, but it countains an object , one that's accessed by $profile->setProfileId

$profile = new entity\Profile();

which by strict standard should not be passed by reference, as in a function:

$this->getAccount($profile);