Unicode escape sequence ----- <?php "\u{0}"; "\u{114}"; "\u{1F602}"; ----- !!php7 array( 0: Stmt_Expression( expr: Scalar_String( value: @@{"\0"}@@ ) ) 1: Stmt_Expression( expr: Scalar_String( value: Ĕ ) ) 2: Stmt_Expression( expr: Scalar_String( value: @@{"\xF0\x9F\x98\x82"}@@ ) ) )