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。