Question

I need to get a left join with a $var! Without variable the code works:

$query->select('d.value AS department');
$query->join('LEFT', '#__jea_departments AS d ON d.id = p.department_id');

I tried all the syntax for entering a variable, but it does not work!

$var="d.test";

$query->select('**$test** AS department');
$query->join('LEFT', '#__jea_departments AS d ON d.id = p.department_id');

I tried "$test" {$test} but it doesn’t work.

Answer 1

You are passing string literals with single quotes, this is the problem. PHP doesn’t interpolate variables within strings defined with single quotes. Change them to double quotes to resolve:

$query->select("$test AS department");

Alternatively concatenate the variables:

$query->select($test . ' AS department');

From the Manual:

Unlike the double-quoted and heredoc syntaxes, variables and escape sequences for special characters will not be expanded when they occur in single quoted strings.