[英]Undefined offset error, but offset is not undefined
I'm getting: 我越来越:
Notice: Undefined offset: 0
in my code, however I can print_r the element I am trying to get and its clearly defined. 在我的代码中,但是我可以print_r我想要得到的元素和明确定义的元素。
function get_members($entries_found) {
$members = $entries_found[0]['member'];
...
}
If I print_r($members) I get the expected output, however I'm still getting the Notice. 如果我print_r($ members)我得到了预期的输出,但是我仍然收到通知。
Any clues? 有线索吗?
Do 做
var_dump($entries_found);
To check that the array does indeed have an offset of zero. 检查数组是否确实具有零偏移量。 Other things you can try would be reseting the array pointer 您可以尝试的其他事情是重置数组指针
reset($entries_found);
of checking if it's set first 检查是否先设置
if (isset($entries_found[0]['member'])) // do things
If all else fails you could just supress the notice with 如果所有其他方法都失败了,你可以用通知来压制通知
$members = @$entries_found[0]['member'];
I don't really know what happens with your $entries_found
before accessing it from get_members
在从get_members
访问之前,我真的不知道你的$entries_found
会发生什么
But i had the same problem. 但我有同样的问题。 print_r
and var_dump
showed me, that the index exists but when i tried to access it i got the offset error
print_r
和var_dump
告诉我,索引存在,但是当我试图访问它时,我得到了offset error
In my case i decoded a json string with json_decode
without setting the assoc
flag. 在我的情况下,我使用json_decode
解码了一个json字符串,而没有设置assoc
标志。
// Not working
$assocArray = json_decode('{"207":"sdf","210":"sdf"}');
echo $assocArray[207];
// working witht the assoc flag set
$assocArray = json_decode('{"207":"sdf","210":"sdf"}', true);
echo $assocArray[207];
Got my solution from here: Undefined offset while accessing array element which exists 从这里得到我的解决方案: 访问存在的数组元素时未定义的偏移量
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