MySQL update queryis not working for varable table name, column, row for inserting a value at that particular position?

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Here is my php code. This update query is not working. I'm naïve in php, can anyone help??

 <?php
 include "connect.php";

 $table_name="CO208#";
 $date = "3-11-2017";
 $faculty = "15PEB203";
 $value = "0";

 $sql = "UPDATE $table_name SET $faculty = '$value' WHERE Date = '$date.'";

 $result = mysqli_query($con,$sql);
 if($result)
 echo "1";
 
 else
 echo "0";
 ?>

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لینک منبع