A frontend is a GUI (Graphical User Interface) for the command-line versions of MAME. A frontend is generally responsible for discovering what games are installed on your system and presenting you with a nice user interface for choosing which one to run using MAME. Frontends often have many spiffy features like cool animations, pictures of cabinets and artwork, details about the games, and other useful tidbits.
 
A frontend is a GUI (Graphical User Interface) for the command-line versions of MAME. A frontend is generally responsible for discovering what games are installed on your system and presenting you with a nice user interface for choosing which one to run using MAME. Frontends often have many spiffy features like cool animations, pictures of cabinets and artwork, details about the games, and other useful tidbits.
  
( ! ) Fatal error: Uncaught TypeError: MWExceptionHandler::rollbackMasterChangesAndLog(): Argument #1 ($e) must be of type Exception, Error given, called in /home/mamedev/wiki.mamedev.org/public_html/includes/exception/MWExceptionHandler.php on line 137 and defined in /home/mamedev/wiki.mamedev.org/public_html/includes/exception/MWExceptionHandler.php on line 111
( ! ) TypeError: MWExceptionHandler::rollbackMasterChangesAndLog(): Argument #1 ($e) must be of type Exception, Error given, called in /home/mamedev/wiki.mamedev.org/public_html/includes/exception/MWExceptionHandler.php on line 137 in /home/mamedev/wiki.mamedev.org/public_html/includes/exception/MWExceptionHandler.php on line 111
Call Stack
#TimeMemoryFunctionLocation
10.07872807888MWExceptionHandler::handle( $e = class Error { protected $message = 'Call to undefined function each()'; private $string = ''; protected $code = 0; protected $file = '/home/mamedev/wiki.mamedev.org/public_html/includes/diff/DairikiDiff.php'; protected $line = 436; private array $trace = [0 => [...], 1 => [...], 2 => [...], 3 => [...], 4 => [...], 5 => [...], 6 => [...], 7 => [...], 8 => [...], 9 => [...], 10 => [...], 11 => [...], 12 => [...], 13 => [...], 14 => [...], 15 => [...], 16 => [...], 17 => [...], 18 => [...], 19 => [...], 20 => [...], 21 => [...], 22 => [...]]; private ?Throwable $previous = NULL; public $xdebug_message = '<tr><th align=\'left\' bgcolor=\'#f57900\' colspan="5"><span style=\'background-color: #cc0000; color: #fce94f; font-size: x-large;\'>( ! )</span> Error: Call to undefined function each() in /home/mamedev/wiki.mamedev.org/public_html/includes/diff/DairikiDiff.php on line <i>436</i></th></tr>\n<tr><th align=\'left\' bgcolor=\'#e9b96e\' colspan=\'5\'>Call Stack</th></tr>\n<tr><th align=\'center\' bgcolor=\'#eeeeec\'>#</th><th align=\'left\' bgcolor=\'#eeeeec\'>Time</th><th align=\'left\' bgcolor=\'#eeeeec\'>M' } ).../MWExceptionHandler.php:0
20.07872807920MWExceptionHandler::rollbackMasterChangesAndLog( $e = class Error { protected $message = 'Call to undefined function each()'; private $string = ''; protected $code = 0; protected $file = '/home/mamedev/wiki.mamedev.org/public_html/includes/diff/DairikiDiff.php'; protected $line = 436; private array $trace = [0 => [...], 1 => [...], 2 => [...], 3 => [...], 4 => [...], 5 => [...], 6 => [...], 7 => [...], 8 => [...], 9 => [...], 10 => [...], 11 => [...], 12 => [...], 13 => [...], 14 => [...], 15 => [...], 16 => [...], 17 => [...], 18 => [...], 19 => [...], 20 => [...], 21 => [...], 22 => [...]]; private ?Throwable $previous = NULL; public $xdebug_message = '<tr><th align=\'left\' bgcolor=\'#f57900\' colspan="5"><span style=\'background-color: #cc0000; color: #fce94f; font-size: x-large;\'>( ! )</span> Error: Call to undefined function each() in /home/mamedev/wiki.mamedev.org/public_html/includes/diff/DairikiDiff.php on line <i>436</i></th></tr>\n<tr><th align=\'left\' bgcolor=\'#e9b96e\' colspan=\'5\'>Call Stack</th></tr>\n<tr><th align=\'center\' bgcolor=\'#eeeeec\'>#</th><th align=\'left\' bgcolor=\'#eeeeec\'>Time</th><th align=\'left\' bgcolor=\'#eeeeec\'>M' } ).../MWExceptionHandler.php:137