$result2 = mysql_query($query, $con);
while($data2 = mysql_fetch_assoc($result2))
{
$x = $data2["x"];
$y = $data2["y"];
echo "$x";
echo "$y";
if($x<0 && $y<0)
{
echo "village: $data[village] ";
echo "player: $data[player] ";
echo "position: ($data[x]|$data[y])<br>";
}
else if($x>0 && $y>0)
{
echo "village: $data[village] ";
echo "player: $data[player] ";
echo "position: ($data[x]|$data[y])<br>";
}
else if($x>0 && $y<0)
{
echo "village: $data[village] ";
echo "player: $data[player] ";
echo "position: ($data[x]|$data[y])<br>";
}
}
我收到错误
Notice: Undefined index: y in C:\xampp\htdocs\debal\nw_check_exec.php on line 48
Notice: Undefined index: x in C:\xampp\htdocs\debal\nw_check_exec.php on line 47
第47行和第48行是: -
$x = $data2["x"];
$y = $data2["y"];
我认为我已经做好了所有事情,我无法弄清楚错误的原因。
答案 0 :(得分:1)
$data2
实际上没有索引x
所以你需要检查它并使用instat默认值。
您可以使用小内联if语句:
$x = isset($data2["x"]) ? $data2["x"] : 0;
$y = isset($data2["y"]) ? $data2["y"] : 0;
那么你真的定义了这么多常量吗?例如。这里:
$data[village]
这意味着必须有一个常数village
可能带有一些值“村庄”?
也许你应该用:
交换它$data["village"]