如何在 SQL/PHP 中的用户输入末尾添加字符串

Question

I have a SQL query that is based on user input. However, in the table, theres a "-1" at the end of every word that you search for. For example if you want to get the sql result of car, it's actually named car-1 in the database, but the user should only be able to search for car. This is how its setup:

$sql = "SELECT * FROM that WHERE this = ?";
$stmt = $conn->prepare($sql);
$search_query = $_POST['this'];
$stmt->bind_param('s', $search_query);
$stmt->execute();
$result = $stmt->get_result();

What I want, is that the select query should be like:

$sql = "SELECT * FROM that WHERE this = ? + '-1'";

But ^^ doesn't work.

Answer 1

$sql = "SELECT * FROM test WHERE NAME='car' & -1";

test = that
NAME= table name
'car' = this

Answer 2

Why don't you just concat -1 to search_query :

$sql = "SELECT * FROM that WHERE this = ?";
$stmt = $conn->prepare($sql);
$search_query = $_POST['this'];
$stmt->bind_param('s', $search_query.'-1');
$stmt->execute();
$result = $stmt->get_result();

Answer 3

Using MySQL:

$sql = "SELECT * FROM that WHERE this = CONCAT(?, '-1')";

Using PHP:

$stmt->bind_param('s', $search_query . "-1");