从空值创建默认对象 [英] Creating default object from empty value

问题描述

我正在我的代码中实现PDO。这就是我做的方式，我在第221行收到错误信息为...... HipHop警告：在第221行的/var/www/webApp/services/CurrencyService.php中从空值创建默认对象。请检查并确认我哪里出错。



公共功能getExchangeRate（$ curr）{



$ stmt = $ this-> vConnection-> prepare（SELECT rate FROM $ this-> tablename where curr =？）;

$ this-> throwExceptionOnError（）;



$ stmt-> bindparam（1，$ curr）;

$ this-> throwExceptionOnError（）;



$ stmt-> execute（）;

$ this-> throwExceptionOnError（）;

$ stmt-> bindColumn（1，$ row-> rate）; //第221行



if（$ row = $ stmt-> fetch（））{

返回$ row;

} else {

返回null;

}

}

i am implementing PDO in my code . this is how i did it ,i am getting an error message on line 221 as ...HipHop Warning: Creating default object from empty value in /var/www/webApp/services/CurrencyService.php on line 221 . please check and verify where i am going wrong.

public function getExchangeRate($curr) {

$stmt = $this->vConnection->prepare("SELECT rate FROM $this->tablename where curr=?");
$this->throwExceptionOnError();

$stmt->bindparam(1, $curr);
$this->throwExceptionOnError();

$stmt->execute();
$this->throwExceptionOnError();
$stmt->bindColumn(1, $row->rate); //line 221

if($row = $stmt->fetch()) {
return $row;
} else {
return null;
}
}

推荐答案

curr）{

curr) {

stmt =

this-> vConnection-> ;准备（SELECT rate FROM

this->vConnection->prepare("SELECT rate FROM

这篇关于从空值创建默认对象的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！