Assigning new by reference (PHP 5 only) ----- <?php $a =& new B; ----- !!php5 array( 0: Stmt_Expression( expr: Expr_AssignRef( var: Expr_Variable( name: a ) expr: Expr_New( class: Name( parts: array( 0: B ) ) args: array( ) ) ) ) ) ----- <?php $a =& new B; ----- !!php7 Syntax error, unexpected T_NEW from 2:7 to 2:9 array( 0: Stmt_Expression( expr: Expr_New( class: Name( parts: array( 0: B ) ) args: array( ) ) ) )