PHP define variable using plain text

There’s a comfortable way to define variable in PHP.

For example,


Note, that closed construction QQQ must be set in the beginning of the line, no spaces. Notes of web-specialist
Since 2009
Fix error "Index (zero based) must be greater than or equal to zero and less than the size of the argument list"

Not so long ago when I was very tired I wrote an SQL-query in my C# application in Visual Studio,...