how can i configure/apply condition to my query to get the result?

How can i configure to my query.

$query_event ="SELECT * FROM event_lis开发者_如何学Got WHERE even_title='$EventTitle' AND even_loc='$EventLocation' ";

now suppose there is form which requires either put title or put location in the form or u can put both and for blank too so what will be the query?

Please help

thanks

Create a starting query, then add on where clauses

$query_event = "Select * from event_list where 1";

if ( $EventTitle ) {
    $query_event .= " and even_title='$EventTitle'";
}

if ( $event_loc ) {
    $query_event .= " and even_loc='$EventLocation'";
}

If you pass your queries this way, you're going to be very vulnerable to SQL injection.

For example, if someone type "'; DELETE FROM EVENT_LIST" as an Event title in a search screen, he can delete your whole table.

Use these advices to protect your datas : https://www.owasp.org/index.php/PHP_Top_5#P3:_SQL_Injection