How to handle basic functions

Functionjieri ($ jieri) {$ SQL = & quot; SELECTgoods_id, goods_thumb, goods_name, shop_price, market_priceFROMhc_goodsWH
Function jieri ($ jieri ){
$ SQL = "SELECT goods_id, goods_thumb, goods_name, shop_price, market_price FROM hc_goods WHERE goods_id in (SELECT goods_id FROM hc_goods_attr WHERE attr_value = '". $ jieri. "') order by goods_id desc limit 5 ";
Global $ db;
$ Result = $ db-> getAll ($ SQL );
Return $ result;
}
$ SQL = "SELECT jieri_name FROM hc_shouye_jieri ";
$ Result1 = $ db-> getAll ($ SQL );

Echo $ a = $ result1 [0] ['jieri _ name']; // output
$ Jieri1 = jieri ("$ ");

Print_r ($ jieri1); // it cannot be printed here

Function print_r ($ jieri1); print it out. if echo $ a = $ result1 [0] ['jieri _ name'] = "assign value", print it out.

What's going on?

------ Solution --------------------
Function jieri ($ jieri ){
Echo $ jieri; // What is it?
$ SQL = "SELECT goods_id, goods_thumb, goods_name, shop_price, market_price FROM hc_goods WHERE goods_id in (SELECT goods_id FROM hc_goods_attr WHERE attr_value = '". $ jieri. "') order by goods_id desc limit 5 ";
Global $ db;
$ Result = $ db-> getAll ($ SQL );
Print_r ($ result); // check what is going on?
Return $ result;
}