Fatal error: Uncaught Error: Undefined constant "marca" in /www/texguar.com.ar/htdocs/texguar/php_formulario_marcas.php:4
Stack trace:
#0 /www/texguar.com.ar/htdocs/texguar/php_listar.php(32): include()
#1 {main}
thrown in /www/texguar.com.ar/htdocs/texguar/php_formulario_marcas.php on line 4