A friend of mine asked to make some changes to his website. When looking at the code I found every php file had this single line of code. So I had to Decode the string and replace the file with the result. From there I was able to make the proper adjustments to the site.
<?php eval("?>".base64_decode("PD9waHANCglpbmNsdWRlX29uY2UoJ2Z1bmN0aW9ucy5waHAnKTsNCj8+DQo8IURPQ1RZUEUgaHRtbCBQdWJsaWMgIi0vL1czQy8vRFREIFhIVE1MIDEuMCBUcmFuc2l0a......=")); ?>
My question is why would someone do such a thing? Doesn't this add an extra process to every page?