內容給出0值

Question

與

<?php 
$item = $_GET['item']; 
$item = str_replace("\"", "", $item); 
$item = str_replace("\'", "", $item); 
$item = str_replace(" ", "%20", $item); 
$item = str_replace("\\", "", $item); 
@include_once ("pdocon.php"); 
$stmt = $dbh->prepare("SELECT * FROM items WHERE name=?"); 
$stmt->execute(array($item)); 
$rs = $stmt->fetch(PDO::FETCH_ASSOC); 
$stmtt = $dbh->prepare("SELECT auth FROM auth where id=1"); 
$stmtt->execute(); 
$code = $stmtt->fetch(PDO::FETCH_ASSOC); 
//print_r($code); 
if(!empty($rs)) { 
     if(time()-$rs["lastupdate"] < 604800) die($rs["cost"]); 
} 
$url = "?api_key=(mykeyhere)&code=".$code."&names=".$item."&delimiter=!END!"; 
$curl = curl_init(); 
curl_setopt($curl, CURLOPT_URL, $url); 
curl_setopt($curl, CURLOPT_RETURNTRANSFER, true); 
curl_setopt($curl, CURLOPT_HEADER, false); 
$obj = curl_exec($curl); 
curl_close($curl); 
if($obj->{'status'} == "fail") die("notfound"); 
$lowest_price = $obj->data->prices[0]->price; 
$lowest_price = (float)($lowest_price); 
$stmt = $dbh->prepare("UPDATE items SET `cost` = ?,`lastupdate` = ? WHERE `name` = ?"); 
$stmt->execute(array($lowest_price, time(), $item)); 
$stmt = $dbh->prepare("INSERT INTO items (`name`,`cost`,`lastupdate`) VALUES (?, ?, ?)"); 
$stmt->execute(array($item, $lowest_price, time())); 
echo $lowest_price; 
?> 

提取的內容給出了在數據庫0值。有人知道爲什麼上面的代碼應該顯示「價格」，這是「1300.00」，不是0 API調用應在畫面提供值的結果：https://gyazo.com/a514f7f46e976d43efd008de778cb5c5 或代碼：

{ 
    "status" : "success", 
    "data" : { 
    "prices" : [ 
     { 
     "market_hash_name" : "AWP | Dragon Lore (Minimal Wear)", 
     "price" : "1300.00" 
     } 
    ] 
    } 
} 

Answer 1

除了我的評論，你需要分析與json_decode（）的捲曲輸出：

$obj = json_decode(curl_exec($curl)); // json_decode gives back an object 
curl_close($curl); 
if($obj->{'status'} == "fail") die("notfound");