php实现通用的信用卡验证类
本文实例讲述了php实现通用的信用卡验证类。分享给大家供大家参考。
原文说明如下:
CreditCardValidationSolution(PHPEdition)
Version3.5
Description
CreditCardValidationSolution™usesafourstepprocesstoensurecreditcardnumbersarekeyedincorrectly.ThisprocedureaccuratelycheckscardsfromAmericanExpress,AustralianBankCard,CarteBlache,DinersClub,Discover/Novus,JCB,MasterCardandVisa.
Formoreinformation,pleasereadthecommentsinthecodeitself.
InstallationInstructions
Selectthetextbetweenthetwolinesindicated,below.
Copythetext.
Openupatexteditor.
Pastethetext.
Savethatfile.Whensavingit,makesureto:
saveitinadirectoryonyourwebserver,and
nameitwithanextensionthatyourserverwillrecognizeneedsparsingbyPHP.
Toseeitinaction,openupthatfileinyourwebbrowswer.
具体代码如下:
<?php #------------------------------------------------------------------------ #CreditCardValidationSolution,version3.5PHPEdition #25May2000 # #COPYRIGHTNOTICE: #a)ThiscodeispropertyofTheAnalysisandSolutionsCompany. #b)Itisbeingdistributedfreeofchargeandonan"asis"basis. #c)Useofthiscode,oranypartthereof,iscontingentuponleaving #thiscopyrightnotice,nameandaddressinformationintact. #d)Writtenpermissionmustbeobtainedfromusbeforethiscode,orany #partthereof,issoldorusedinaproductwhichissold. #e)Byusingthiscode,youacceptfullresponsibilityforitsuse #andwillnotholdtheAnalysisandSolutionsCompany,itsemployees #orofficersliablefordamagesofanysort. #f)Thiscodeisnottobeusedforillegalpurposes. #g)Pleaseemailusanyrevisionsmadetothiscode. # #Copyright2000http://www.AnalysisAndSolutions.com/code/ #TheAnalysisandSolutionsCompanyinfo@AnalysisAndSolutions.com #------------------------------------------------------------------------ # #DESCRIPTION: #CreditCardValidationSolutionusesafourstepprocesstoensure #creditcardnumbersarekeyedincorrectly.Thisprocedureaccurately #checkscardsfromAmericanExpress,AustralianBankCard,CarteBlache, #DinersClub,Discover/Novus,JCB,MasterCardandVisa. # #CAUTION: #CCVSusesexactnumberrangesaspartofthevalidationprocess.These #rangesarecurrentasof20October1999.Ifpresentlyundefinedranges #comeintouseinthefuture,thisprogramwillimproperlydejectcard #numbersinsuchranges,renderinganerrormessageentitled"Potential #CardTypeDiscrepancy."Ifthishappenswhileenteringacard&type #youKNOWarevalid,pleasecontactussowecanupdatetheranges. # #POTENTIALCUSTOMIZATIONS: #*Ifyoudon'tacceptsomeofthesecardtypes,editStep2,usingpound #signs"#"tocommentoutthe"elseif,""$CardName"and"$ShouldLength" #linesinquestion. #*Additionalcardtypescanbeaddedbyinsertingnew"elseif," #"$CardName"and"$ShouldLength"linesinStep2. #*ThethreefunctionsherecanbecalledbyotherPHPdocumentstocheck #anynumber. # #CREDITS: #WelearnedoftheMod10AlgorithminsomePerlcode,entitled #"TheValidator,"availableonMatt'sScriptArchive, #http://worldwidemart.com/scripts/readme/ccver.shtml.Thatcodewas #writtenbyDavidParis,whobaseditonmaterialMelvynMyersreposted #fromanunknownauthor.PariscreditsAriesSolisfortrackingdownthe #dataunderlyingthealgorithm.Atthesametime,ourcodebearsno #resemblancetoitspredecessors.CCValidationSolutionwasfirstwritten #forVisualBasic,onwhichAllenBrowneandRicoZschauassisted. #NeilFraserhelpedprunedowntheOnlyNumericSolution()forPerl. functionCCValidationSolution($Number){ global$CardName; #1)Getridofspacesandnon-numericcharacters. $Number=OnlyNumericSolution($Number); #2)Dothefirstfourdigitsfitwithinproperranges? #Ifso,who'sthecardissuerandhowlongshouldthenumberbe? $NumberLeft=substr($Number,0,4); $NumberLength=strlen($Number); if($NumberLeft>=3000and$NumberLeft<=3059){ $CardName="DinersClub"; $ShouldLength=14; }elseif($NumberLeft>=3600and$NumberLeft<=3699){ $CardName="DinersClub"; $ShouldLength=14; }elseif($NumberLeft>=3800and$NumberLeft<=3889){ $CardName="DinersClub"; $ShouldLength=14; }elseif($NumberLeft>=3400and$NumberLeft<=3499){ $CardName="AmericanExpress"; $ShouldLength=15; }elseif($NumberLeft>=3700and$NumberLeft<=3799){ $CardName="AmericanExpress"; $ShouldLength=15; }elseif($NumberLeft>=3528and$NumberLeft<=3589){ $CardName="JCB"; $ShouldLength=16; }elseif($NumberLeft>=3890and$NumberLeft<=3899){ $CardName="CarteBlache"; $ShouldLength=14; }elseif($NumberLeft>=4000and$NumberLeft<=4999){ $CardName="Visa"; if($NumberLength>14){ $ShouldLength=16; }elseif($NumberLength<14){ $ShouldLength=13; }else{ echo"<br/><em>TheVisanumberentered,$Number,inis14digitslong.<br/>Visacardsusuallyhave16digits,thoughsomehave13.<br/>Pleasecheckthenumberandtryagain.</em><br/>n"; returnFALSE; } }elseif($NumberLeft>=5100and$NumberLeft<=5599){ $CardName="MasterCard"; $ShouldLength=16; }elseif($NumberLeft==5610){ $CardName="AustralianBankCard"; $ShouldLength=16; }elseif($NumberLeft==6011){ $CardName="Discover/Novus"; $ShouldLength=16; }else{ echo"<br/><em>Thefirstfourdigitsofthenumberenteredare$NumberLeft.<br/>Ifthat'scorrect,wedon'tacceptthattypeofcreditcard.<br/>Ifit'swrong,pleasetryagain.</em><br/>n"; returnFALSE; } #3)Isthenumbertherightlength? if($NumberLength<>$ShouldLength){ $Missing=$NumberLength-$ShouldLength; if($Missing<0){ echo"<br/><em>The$CardNamenumberentered,$Number,ismissing".abs($Missing)."digit(s).<br/>Pleasecheckthenumberandtryagain.</em><br/>n"; }else{ echo"<br/><em>The$CardNamenumberentered,$Number,has$Missingtoomanydigit(s).<br/>Pleasecheckthenumberandtryagain.</em><br/>n"; } returnFALSE; } #4)DoesthenumberpasstheMod10AlgorithmChecksum? if(Mod10Solution($Number)==TRUE){ returnTRUE; }else{ echo"<br/><em>The$CardNamenumberentered,$Number,isinvalid.<br/>Pleasecheckthenumberandtryagain.</em><br/>n"; returnFALSE; } } functionOnlyNumericSolution($Number){ #Removeanynonnumericcharacters. #Ensurenumberisnomorethan19characterslong. returnsubstr(ereg_replace("[^0-9]","",$Number),0,19); } functionMod10Solution($Number){ $NumberLength=strlen($Number); $Checksum=0; #Addevendigitsinevenlengthstrings #orodddigitsinoddlengthstrings. for($Location=1-($NumberLength%2);$Location<$NumberLength;$Location+=2){ $Checksum+=substr($Number,$Location,1); } #Analyzeodddigitsinevenlengthstrings #orevendigitsinoddlengthstrings. for($Location=($NumberLength%2);$Location<$NumberLength;$Location+=2){ $Digit=substr($Number,$Location,1)*2; if($Digit<10){ $Checksum+=$Digit; }else{ $Checksum+=$Digit-9; } } #Isthechecksumdivisiblebyten? return($Checksum%10==0); } #-----------BEGINSAMPLEUSERINTERFACESECTION------------ # #Thissectionprovidesasimplesampleuserinterfaceforthe #CreditCardValidationfunctions.ItgeneratesanHTMLform #whereyouenteracardnumbertocheck. # #Ifanumberhasbeenpostedbytheform,checkit. if(isset($Number)){ #Getridofspacesandnon-numericcharactersinposted #numberssotheydisplaycorrectlyontheinputform. $Number=OnlyNumericSolution($Number); if(CCValidationSolution($Number)==TRUE){ echo"<br/>The$CardNamenumberentered,$Number,<em>is</em>valid.<br/>n"; } }else{ $Number=""; } #Setupaninputform.Postingitcallsthispageagain. echo"<formmethod="post"action="$REQUEST_URI">n"; echo"<br/>CreditCardNumber:<inputtype="text"name="Number"value="$Number">n"; echo"<inputtype="Submit"name="submitr"value="CheckitsValidity">n"; echo"</form><br/>n"; # #------------ENDSAMPLEUSERINTERFACESECTION------------- ?>
希望本文所述对大家的php程序设计有所帮助。