PHP Sandbox TIP!!
Variable functions 'phpinfo'() => phpinfo() "phpinfo"() => phpinfo() PHP Type Juggling *( [a-zA-Z0-9_]만 적용 ) system('ls') => system(ls) // Notice: Use of undefined constant ls - assumed 'ls' PHP Variables Trick ##################################### $a = 'b'; $b = 'NGA'; $c = '_GET'; echo $$a; // printed NGA echo $$c['v']; // print $_GET['v'] echo $$c{'v'}; // print $_GET['v'] ###################..