PHP数组未定义索引通知

Question

When I print an array with

print_r($item)

I get a result

Array(
[First Name] => Sam
[Gender] => 2
[Last Name] => Smith
)

But when I do echo $item['First Name'] I receive PHP notice undefined index. Why does it happen?

Answer 1

Make sure that you have this structure in the associative array:

$item = ['First Name' => 'Sam', 'Gender' => 2, 'Last Name' => 'Smith'];

echo $item['First Name'];

echo $item['First Name']; will output: Sam