解析错误：语法错误，在li [duplicate]上的C：\ xampp \ htdocs \ sms \ include esult.php中出现意外的'$ this'（T_VARIABLE）

Question

This question already has an answer here:

• PHP parse/syntax errors; and how to solve them? 17 answers

<?php
    class Result{

        protected $db_table        =  "result";
        protected $db_table_fields =  array();

        public $english;
        public $urdu;
        public $math;
        public $physics;
        public $chemistry;
        public $biology;

        public $english_grade;
        public $urdu_grade;
        public $math_grade;
        public $physics_grade;
        public $chemistry_grade;
        public $biology_grade;

        public function grading(){

            if($this->english >= 90 && $this->english <= 100)
                $this->english_grade = "A";
            else if($this->english >= 80 && $this->english < 90)
                $this->english_grade = "B";
            else if($this->english >= 70 && $this->english < 80)
                $this->english_grade = "C";
            else if($this->english >= 50 && $this->english < 70)
                $his->english_grade  = "D";
            else ($this->english >= 0 && $this->english <  50)
                $this->english_grade = "Fail";

        }

    }//class ends here
?>

</div>

Answer 1

else ($this->english >= 0 && $this->english <  50)
     $this->english_grade = "Fail";

Else doesn't expect a condition which is why $this is unexpected.

$his->english_grade  = "D";

This also looks like another error that will affect functionality.