Fatal error: Uncaught TypeError: implode(): Argument #2 ($array) must be of type ?array, false given in /www/htdocs/w0090dbd/khk/html/herzinfarkt.html:204 Stack trace: #0 /www/htdocs/w0090dbd/khk/html/herzinfarkt.html(204): implode('', false) #1 {main} thrown in /www/htdocs/w0090dbd/khk/html/herzinfarkt.html on line 204