null : Variable to assign key to * 'byRef' => false : Whether to assign value by reference * 'stmts' => array(): Statements * @param int $line Line * @param null|string $docComment Nearest doc comment */ public function __construct(PHPParser_Node_Expr $expr, PHPParser_Node_Expr $valueVar, array $subNodes = array(), $line = -1, $docComment = null) { parent::__construct( $subNodes + array( 'keyVar' => null, 'byRef' => false, 'stmts' => array(), ), $line, $docComment ); $this->expr = $expr; $this->valueVar = $valueVar; } }