Question

I am trying to search MySQL database with a search key entered by the user. My data contain upper case and lower case. My question is how to make my search function not case sensitive. ex:data in mysql is BOOK but if the user enters book in search input. The result is not found….Thanks..

My search code

$searchKey=$_POST['searchKey'];
$searchKey=mysql_real_escape_string($searchKey);

$result=mysql_query("SELECT *
            FROM product
            WHERE product_name like '%$searchKey%' ORDER BY product_id
                            ",$connection); 

Answer 1

Just uppercase the search string and compare it to the uppercase field.

$searchKey= strtoupper($_POST['searchKey']);
$searchKey=mysql_real_escape_string($searchKey);

$result=mysql_query("SELECT * FROM product
        WHERE UPPER(product_name) like '%$searchKey%' ORDER BY product_id
         ",$connection);