fixed updateCourse.php, zie beschrijving errors

course update gefixed waarbij ik de volgende errors tegenkwam en ging
oplossen:

• Warning: require(../functions/users.php): failed to open stream: No
such file or directory in
C:\Users\yomac_000\Documents\GitHub\website\includes\header.php on line
4

• Fatal error: require(): Failed opening required
'../functions/users.php' (include_path='.;C:\xampp\php\PEAR') in
C:\Users\yomac_000\Documents\GitHub\website\includes\header.php on line
4

• error is dit nu: Fatal error: Cannot redeclare user_data() (previously
declared in
C:\Users\yomac_000\Documents\GitHub\website\core\functions\users.php:7)
in C:\Users\yomac_000\Documents\GitHub\website\core\functions\users.php
on line 13
• Fatal error: Cannot use object of type stdClass as array in
C:\Users\yomac_000\Documents\GitHub\website\core\functions\courseFunctions.php
on line 29

• Notice: Undefined index: course_id in
C:\Users\yomac_000\Documents\GitHub\website\core\functions\courseFunctions.php
on line 31

• Warning: mysqli_fetch_array() expects parameter 1 to be mysqli_result,
null given in
C:\Users\yomac_000\Documents\GitHub\website\updateCourse.php on line 22

• Notice: Undefined index: course_id in
C:\Users\yomac_000\Documents\GitHub\website\core\functions\courseFunctions.php
on line 31