\sergiosgc\sprintf adds to sprintf a new conversion specifier for named arguments. In regular sprintf, arguments are applied to conversion specifiers using order only:

$result = sprintf('%d is %s in %s', $target, $role, $container);

\sergiosgc\sprintf allows you to use named conversion specifiers:

$result = sprintf('%<target> is %<role> in %<container>', [ 'target' => $target, 'role' => $role, 'container' => $container ]);

The first argument after the format string is an associative array of named arguments. You may also use classic position based conversion specifiers:

$result = sprintf('%<named> mixed with %s', [ 'named' => $someVar ], $positionalArgument);

\sergiosgc\printf shares \sergiosgc\sprintf behavior, except it prints the result instead of returning it.