PHP: “Notice: Undefined variable”, “Notice: Undefined index”, and “Notice: Undefined offset”
I am running a PHP script, and keep getting errors like:
Notice: Undefined variable: my_variable_name in C:wampwwwmypathindex.php on line 10
Notice: Undefined index: my_index C:wampwwwmypathindex.php on line 11
Line 10 and 11 looks like this:
echo "My variable value is: " . $my_variable_name;
echo "My index value is: " . $my_array["my_index"];
What do these errors mean?
Why do they appear all of a sudden? I used to use this script for years and I’ve never had any problem.
What do I need to do to fix them?