Fatal error: Uncaught TypeError: implode(): Argument #1 ($array) must be of type array, string given in /home/preslave/uchimsteb/teacher.php:195 Stack trace: #0 /home/preslave/uchimsteb/teacher.php(195): implode(', ', NULL) #1 /home/preslave/uchimsteb/teacher.php(68): print_teacher_ages() #2 /home/preslave/uchimsteb/teacher.php(3): print_teacher() #3 /home/preslave/uchimsteb/_header.php(576): include_once('/home/preslave/...') #4 /home/preslave/uchimsteb/_header.php(232): print_contents() #5 /home/preslave/uchimsteb/_header.php(76): print_main_area() #6 /home/preslave/uchimsteb/_header.php(5): print_header() #7 /home/preslave/uchimsteb/index.php(3): include('/home/preslave/...') #8 {main} thrown in /home/preslave/uchimsteb/teacher.php on line 195