env" i.kí ┤┬ ┤δ╝╥╣«└jaª ▒╕║░╟╧┤┬ ░µ┐∞░í └╓┤┘./d┤┘. ┴╓╝«└╗ ╝│┴ñ ┴÷╜├╛ε┐═ ░░└gif" /> <a href="#env" i.kí ┤┬ ┤δ╝╥╣«└<img alt="" src="./images/down.gif" /> <a href="#modules">╕≡╡Γ</a$A$N$G9T$p>TNc3%s$NNc3#(Bol<(ifm ;envides a mechanism for storing$N$G9Tinforma<%?% innmit d varia└╟es that are c""╕ d nem>environm9%F$N$G9Tvaria└╟es</em>."%his informa<%?% can be us d to syntrolTvarious$N$G9Topera<%?%s such as logging or accass syntrol."%he varia└╟es are$N$G9Talso us d as a mechanism to symmunic=". with od_src=l ;engrams$N$G9Tsuch as CGI scripts."%his dnbum9%F discusses differ9%F ways to$N$G9T<anipuliie and us tNcse varia└╟es.les">╕lasoti01 Although tNcse varia└╟es are ┬ ┤err d to as nem>environm9%F$N$G9Tvaria└╟es</em>, tNcy are not tNc3sit as tNc3environm9%F$N$G9Tvaria└╟es syntrolled by tNc3unp" lying opera<%ng syst <.h$&$KFInst ad, tNcse varia└╟es are stor d and <anipuliied innan$N$G9Tin_src=l %s$NNc3structure."%hey only besym actu=l opera<%ng$N$G9Tsyst <3environm9%F varia└╟es when tNcy are ;envided to CGI$N$G9Tscripts and l<(ifm SideFIncludeFscripts."If you wish to$N$G9T<anipuliie tNc3opera<%ng syst <3environm9%F unp" which tNc$N$G9Ts<(ifm itself runs, you must us tNc3standard3environm9%F$N$G9T<anipulii%?% mechanisms ;envided by your3opera<%ng syst <$N$G9Tshell.$B$=$N$G$-x mod_#%l%/^$l$quickbsto$F!ulapplieoc$F!li>≡$K4X$9$kCm0U;v9`(Bp>/cordownp>ushttp3╔┤δ
<p>ushttp aaidex mod_#%l%/%oct;en&n"selve". Howrsynmit ssset<%ngoappliset<%ngo.Set<%ng Environm9%F Varia└╟es<//lle$B$K$$G9Tlasoti0m╧└╟ ┴%oct;en aliiedevetrveth>Raliied Mviul-s</th>eth>Raliied D;HMQ$G$-s</th>e/trvetrvetdF!ulF!li>≡ <Locass="≤mviul-%XaC%Wown.giveelvee_env" i.kí>vee_enveoo.txtMainle$C$!li>≡ <Locass="≤mviul-%XaC%Wown.giveelvee_rewrit " i.kí>vee_rewrit eoo.txtMainle$C$!li>≡ <Locass="≤mviul-%XaC%Wown.giveelvee_setenvif" i.kí>vee_setenvifeoo.txtMainle$C$!li>≡ <Locass="≤mviul-%XaC%Wown.giveelvee_unique_id" i.kí>vee_unique_ideoo.txtMainle$C$!2L$+ atdF!tdF!ulF!li>≡ <Locass="≤x>qB%I%-%XaC%Wown.giveelmee_setenvif" i.k#brows<(m tch">Brows<(M tcheoo.txtMainle$C$!li>≡ <Locass="≤x>qB%I%-%XaC%Wown.giveelmee_setenvif" i.k#brows<(m tchnoca╝«└╗Brows<(M tchNoCa╝«eoo.txtMainle$C$!li>≡ <Locass="≤x>qB%I%-%XaC%Wown.giveelmee_env" i.k1 ssenv">P ssEnveoo.txtMainle$C$!li>≡ <Locass="≤x>qB%I%-%XaC%Wown.giveelmee_rewrit " i.k#rewrit rul-%XRewrit Rul-eoo.txtMainle$C$!li>≡ <Locass="≤x>qB%I%-%XaC%Wown.giveelmee_env" i.k1setenvo.SetEnveoo.txtMainle$C$!li>≡ <Locass="≤x>qB%I%-%XaC%Wown.giveelmee_setenvif" i.k#setenvifo.SetEnvIfeoo.txtMainle$C$!li>≡ <Locass="≤x>qB%I%-%XaC%Wown.giveelmee_setenvif" i.k#setenvifnoca╝«└╗SetEnvIfNoCa╝«eoo.txtMainle$C$!li>≡ <Locass="≤x>qB%I%-%XaC%Wown.giveelmee_env" i.k1unsetenvo.UnsetEnveoo.txtMainle$C$!2L$+ atdF!/trve/m╧└╟ aCG$rBe9T$h3rsynmit ssbasic-<anipulii%?%"applibasic-<anipulii%?%">Basic Environm9%F Manipulii%?%<//lle$3$Iidex<d>$(Bh$&$KF0:9T$p>TNc3most basic way to set an3environm9%F varia└╟e in %s$NNch$&$KF0:9Tis us%ng tNc3unsyndi<%?%ak ≡ <Locass="≤x>qB%I%-%XaC%Wown.giveelmee_env" i.k1setenvo.SetEnveoo.txtMain x>qB%I%-. Varia└╟es may also be ssed fromh$&$KF0:9TtNc3environm9%F of tNc3shell which stcr$ed tNc3s<(ifm us%ng tNc
A0$rBe9T$tsodocass="≤x>qB%I%-%XaC%Wown.giveelmee_env" i.k1 ssenv">P ssEnveoo.txtMain x>qB%I%-.les">╕lasoti$rBe9T$h3rsynmit sssyndi<%?%ak"applisyndi<%?%ak">Cyndi<%?%ak Per-Request Set<%ngs<//lle$3$Iidex<d>$(Bh$&$KF0:9T$p>For addi<%?%ak flexibility, tNc x>qB%I%-s ;envided byh$&$KF0:9Tmee_setenvif allow3environm9%F varia└╟es to be set ?% ah$&$KF0:9Tper-request basis, syndi<%?%ak ?% characteristics of p rticulirh$&$KF0:9Trequests."For N$G$9!#, a varia└╟e could be set ?%ly when ah$&$KF0:9Tspecific brows<( (Us<(-Ag9%F)Tis making a request, or ?%ly whenh$&$KF0:9TaTspecific R ┤er<( [sic] ablp" Tis found. Even mor flexibilityh$&$KF0:9Tis añ╞─└╧└╟ ┴through tNc mee_rewrit 'sT$tsodocass="≤x>qB%I%-%XaC%Wown.giveelmee_rewrit " i.k#rewrit rul-%XRewrit Rul-eoo.txtMain which uses tNc3
A0$rBe9T$tsod>[E=...]txtMain opi%?% to set environm9%F varia└╟es.les">╕lasoti$rBe9T$h3rsynmit ssunique-id9%Fifiero"appliunique-id9%Fifiero"$onique Id9%Fifiero<//lle$3$Iidex<d>$(Bh$&$KF0:9T$p>Fi%akly, vee_unique_id sets tNc3environm9%F varia└╟e
A0$rBe9T$tsod>UNIQUE_IDtxtMain for e$NN request to a value which is
A0$rBe9Tguaran_sed to be unique across =""╕╖╬requests unp" ifmyh$&$KF0:9Tspecific ogidex modpecific ogid>Sich tNc$to ssynmit ssset<%ng"appliunique-id9%Fifiero"$oInquest Set╟e
A bex>qB%I%-s ;envided by uses arinronm9%F of tNc╟es areuN$h$&$K you mria└SetEnveoo.tmay also b, to symmunicmria9%F of tNcSSI <//lsera<%ng$N$G9Tss area$&$KF0fex>qB%I%-s ;envided b9%F of tNcare ainhen meta-e c""╕ d nemab$H$$ay a varia└╟asa varirp>For addi<%?%a$_9~$^$l$g"> hr</%g%ogi-e un.golux.com/sot<3enviroto be unique"applibaslmee_env" i.k1 ssenv">P ssEnveooaveates.les"oaveates>SinnaCaveateset<%ng"appliunique-id9%Fifiero"N$G9T$p>DSO ╛ε╢▓%╟├Itic] o as(BpsiTis fo ouarr tNcirot usgnp" which tNc$t<3enviroto b</em>, tNcy set an3enx>qB%I%-s ;f runs, you m9%u$F!"(Bo%╟╩┐Σ╟╧╣╟╖╬ ╛ε╢ ╛ε╢▓%╟├Wques$^$l$g"> suexe╟╥$rBe9Tsuexe╟jaª ▒ to s e$NN lavirh╣╟╖╬ ╛ε╢ ╛ε╢to symmunic,an3enx>qB%I%-s ;wi beb&$KFea╕≡╡Γ Var╟e
A0$rBe9Tallows for flexible syntrol%9%]!ccass ?%tNc3s<(ifm bammunonm0:.r(BF01$%i%`$K$h$j%(%/%9%]tNc3cliemy."For N$G$9!#, you ariaet;etNcse 0:.r(BF01x>qB%I%-s ?%da╝«3!ccass ?%a p rticulir brows<( (Us<(-Ag9%F).ª ──╞─└╧╟╥ ╝ cs>╟SI Pmg cset<%ng"appliunilogging"applilogging">Cyndi<%?%ak LoggingI)th od_src$KF0:ntroard3enocasi arE""╕ d nemyst <3envidecan be logged inntNc3!ccass logeqB%It<3enviroto be &i>≡ <#logc""╕ d="≤xgF""╕ dB%I%-%XaC%Wown.giveelmee_env" i.k1 ssenv">P ssEnveoo.txtMaint<3envirotopi%?% ║ <L>%etxtMain asb&$a numbd9. Ct decie> pts heNhert<3envirotor not to logerequests can be mCa╝ bammunonm9%F %-stu/%9%]nicmr9Talac""╕ d nemyst <3envideqB%I%-s e$k%$B<B9T%W1 s%9%]tNc3
A0$rBe9T$tsodocass="≤x>qB%I%-%XaC%Wown.giveelmee_aC%Wown.giveelveeeoo.txtMainle$C$!2L$+ atdF!td0:.r(BF01x>qB%I%-sasb&dmabinaripts athT$tsodocass="≤x>qB%I%-%XaC%Wown.giveelmee_setenvif" i.k#setenvifo.SetEnvIfeoo.txtMaindrBe93allows for flexible syntrol%9%]eb&$reh$&$KF0:9Trequests em>, ogged."For N$G$9!#, you aria bvose not to logeh$&$KF0:9Trequests for fileinecifenc="t inn║ <L>giftxtMain,dor you ari0:.r(BF01$%vose m>, set ?ogerequests ra<%ncliemy beb&$reem>,tNcs seyour0:9Tadetailubnetymg cs>╟SI Pmg cset<%ng"appliunirespons<tablp" Fifierorespons<tablp" Fi>Cyndi<%?%ak Respons< Htenvifeoo.tx$3$Iidex<d>$(Bh$&$KF0:9T$p>TNc3>≡ <#÷ └╓┤┘.$H └╓┤┘eelmee_setenvif" i.k#setenvifnoca╝«└╗SetEnvIfNoCa╝«eoo.txtMain0:.r(BF01x>qB%I%- ariaet;etNcTpecsencset
A0$rBe9Tabsencsetf an3environm9%F varia└╟e ?%daK$hma╝«s heNhertor noth$&$KF0:9TaTcerTsΓ└║#(Boablp" T anε╢ ╛εo symmuinntNc3respons< ?%tNc0:.r(BF01$liemy."TBe93allows, for e$G$9!#, a cerTsΓ└║respons< ablp" ToAs=l ;engrabe sent ?%ly if a syrresponc="t ablp" Tis qBeI%-muinntNch$&$KF0:9Trequestera<%ng$N$$liemy.mg cs>╟SI Pmg g cset<%ng"appliuniod_src=l-t an3eifierood_src=l-t an3ei└╗Sesrc=l tEnvIf AB%I%ii%?%<//lle$3$Iidex<d>$(Bh$&$KF0:9T$p>╗Sesrc=l t an3es3^$l$g"> vi░░└gulF!li>≡ <xt_fi░░└gul-%XaC%Wown.giveelvee_setenvif" i.kí>vee_setenvifeoo.txtMa÷ >env unpx>qB%I%-s enviroF!#extfi░░└ghef>╕≡9$kCtFi░░└gDef>╕≡eelmee_setenvif" i.k#setenvifnoca╝«└╗SetEnvIfNoCa╝«eoo.txtMain1x>qB%I%- aris=l ;engrab«3!c%I%iivi░$k%$B<B9T%W%m%an3environm9%F varia└╟e us%ng tNc
A0$rBe9T$tsod>╢toa└╟ec""=o.txtloeG9Tv║ <L>ena└╟ec""=o.txtloeopi%?%s.$B$=$N$GPmg g cset<%ng"appliuniurl-" i.k1appliset<trl-" i.k1appl>URL R i.k1appeoo.tx$3$Iidex<d>$(Bh$&$KF0:9T$p>TNc3>≡ <#>%{ENV:...}txtMain formim$p>T╣╟TestStrippeo ╛ε╢ ╛ε╢▓%╟├% ch-s enviroF!#extfi░░└ghef>╕≡9$kCtFi░░└gDef>╕≡eeln.giveelmee_env" i.k1 ssenv">P ssEnveoo.txtMain
A0$rBe9Tallows mee_rewrit 'sTrewrit nicmr9Talac"ga╝«s ?% ah$ decie>s░$k%$B<B9T%W%m%environm9%F varia└╟es.nicmr9TalaNoie tNatm9%F varia└╟es accassi└╟e in mee_rewrit s athtNc use
A0$rBe9T$tsod>ENV:txtMain p(B5ix are not actu=lly n&nbyh$&9!#Nser-re" 0fea <//l9. R$Nher, tNcy are ou mria└Setpeciak to mee_rewrit Nser-re" 0eb&$reariIQUE_IDtcc3envi░ra<%noNhert_fi░░└s.$B$=$N$GPmg $N≡╡Γ</a$_9~$%oct;en$S$^$9!#(B59-1 <tablp" eve"codechoiclass=ro gule" />>
<p>ushttaaidex moi>≡$K4X$9$kCm0U;v9`(Bp>/cordownp>ushttpspeciakofiero"peciako.Speciak Purpose Environm9%F Varia└╟es<//llele$B$K$$G9Tlasoties arinrovIfopera/em>, tpen└╟ems ha%- l c""╕ 9%F introdueriptsmunicmr9Talamechanisms to meeify tNc3way of tNc3beha%-s when talking oAs=l ;engrap rticulir cliemy ."T?% ah$ tNcse mechanisms ariflexible a└>env unpx>roto b</, tNcy are invokvi░░└gfnocaing environm9%F varia└╟es,ε╢▓%╟├% ch-ypic=lly athT$tsodocass="≤x>qB%I%-%XaC%Wown.giveelmee_setenvif" i.k#brows<(m tch">Brows<(M tcheoo.txtMain,ε╢▓%╟├% ch-hough ≡ <Locass="≤x>qB%I%-%XaC%Wown.giveelmee_env" i.k1setenvo.SetEnveoo.txtMain G9Tv
A0$rBe9T$tsodocass="≤x>qB%I%-%XaC%Wown.giveelmee_env" i.k1 ssenv">P ssEnveoo.txtMain could also be -s ;,ε╢▓%╟├% chfor e$G$9!#.les">╕lasoti0%ng"appliuni befgrlp"ofiero befgrlp"o> befgrlp"-1=hleaide$3$Iidex<d>$(Bh$&$KF0:9T$p>TNis forces tNc3request to be treiivi░as a #(B/t(Brequestnicmr9Talacven if iF wa9%F oa liier1x>alqB%ymg cs>╟SI Pmg cset<%ng"appliuniforce-no-vary"$^$l$g"rce-no-vary">g"rce-no-varyleaide$3$Iidex<d>$(Bh$&$KF0:9T$p>TNis caria└╟$K y$tsod>VaryletNc set elds to be removed fromh$&$KF0:9TtNc3respons< ablp" TKF0fe▓eic$t<3sent back""╕ 9%F $liemy.">DSO0:.r(BF01$liemys dnn'tTin_srp(BtdrBe93t eld syrrectly (Nalibas i.k1 ssemisc/knbef_$liemy_pen└╟emsif" i.kknbef1$liemyh$&$KF0:9Tpen└╟emsx>qB <); set<%ngdrBe93varia└╟e can3work arounddrBe9TsΓ└║ sequpen└╟em. Set<%ngdrBe93varia└╟e also i$9!ia└>env unpx><strong>g"rce-respons<t1=hlestrong>ymg cs>╟SI Pmg cset<%ng"appliuniforce-respons<"$^$l$g"rce-respons<">g"rce-respons<t1=hleaide$3$Iidex<d>$(Bh$&$KF0:$p>TNis forces an #(B/t(Brespons< ?%$liemys making an #(B/t(h$&$KF0:requestsasF wa9%origi%aklyh$&$KF0:i$9!#m9%Fvi░as a result peah$&en└╟em athTAOL'Ss tNxil9. >DSO0:.r(BF#(B/t(B$liemys mayNIQUE_Iha%- syrrectly when given an #(B/th$&$KF0:respons<Set,an3eis can be us d to iovIfopera". with basm.mg cs>╟SI Pmg g cset<%ng"appliunigzip-?%ly-sod_- i.kí ^$l$gzip-?%ly-sod_- i.kí>gzip-?%ly-sod_m i.kleaide$3$Iidex<d>$(Bh$&$KF0:9T$p>virh╣l%, to a value pea"1",drBe93varia└╟e ╢toa└╟es tNc3DEFLATEt<3envirotoutpNc t an3en;envided by ulF!li>≡ <xt_fi░░└gul-%XaC%Wown.giveeld ┤δ╝" i.kí>vee_und ┤δ╝" eoo.txtMain ft
A0$rBe9Tcyntax"- yp(snoNherttNann║ <L>sod_m i.klec,an3ens$=$N$GPmg g cset<%ng"appliunino-gzipí ^$l$no-gzipí>no-gzipleaide$3$Iih$&$KF0:9T$p>virh╣l%,,%-s envirotDEFLATEf tNc set an3enmunicmr9TalaulF!li>≡ <xt_fi░░└gul-%XaC%Wown.giveeld ┤δ╝" i.kí>vee_und ┤δ╝" eoo.txtMain anε╢ ╛εturílasoff.mg cs>╟SI Pmg g cset<%ng"appliuninokvepalI%-% ^$l$nokvepalI%-%>nokvepalI%-leaide$3$Iidex<d>$(Bh$&$KF0:9T$p>TNis ╢toa└╟es $tsodocass="≤x>qB%I%-%XaC%Wown.giveelicitlynd└#kvepalI%-%>KvepAlI%-leaidetMain whrh╣l%,.mg cs>╟SI Pmg g cset<%ng"appliunip┬ ┤er-l╜├╛ε┤┬ "$^$l$ n.┤er-l╜├╛ε┤┬ "> n.┤er-l╜├╛ε┤┬ leaide$3$Iih$&$KF0:9T$p>%his influences $tsodocass="≤_fi░░└gul-%XaC%Wown.giveelnegotihowto/.kí>vee_unnegotihowtoleaidetMain'sE_Iha%iouo asunicmr9TalaitrBe9TsΓ└soa li├╛ε┤┬ tag (Nuch as ║ <L>entxtMain,d║ <L>jatxtMaint<3envirotord║ <L>x-klingontxtMain), $tsodocass="≤_fi░░└gul-%XaC%Wown.giveelnegotihowto/.kí>vee_unnegotihowtoleaidetMain tria└>env unpx> ?%dalI%-r a variant with baatmli├╛ε┤┬ ."If Nher