> Problem is that it also permits post codes like "W3NEREF8
> 6TXSDF", because within the string it can find at least one
> sequence specified in the RegEx.
Stick ^ at the beginning and $ at the end:
^[A-Z]{1,2}\d[A-Z\d]? \d[ABD-HJLNP-UW-Z]{2}$
^ = start of string
$ = end of string
Or you could try something like this that does a more "complete" job by
checking not only that it's valid with regard to letters/numbers, but
also that it doesn't contain any invalid characters in the wrong place
and that the out- and in-code parts are valid. (watch the wrap!)
<!--- Validate a UK postcode --->
<cffunction name="postcodeValidate" access="public" returntype="boolean"
output="no" hint="Validate a UK postcode">
<cfargument name="postcode" type="string" required="yes" hint="The
postcode to validate">
<cfscript>
// localise vars
var i = "";
var pca = "";
var regex = "";
// the list of valid postcode areas (124 of them...)
var pcalist =
"AB,AL,B,BA,BB,BD,BH,BL,BN,BR,BS,BT,CA,CB,CF,CH,CM,CO,CR,CT,CV,CW,DA,DD,
DE,DG,DH,DL,DN,DT,DY,E,EC,EH,EN,EX,FK,FY,G,GL,GU,GY,HA,HD,HG,HP,HR,HS,HU
,HX,IG,IM,IP,IV,JE,KA,KT,KW,KY,L,LA,LA,LE,LL,LN,LS,LU,M,ME,MK,ML,N,NE,NG
,NN,NP,NR,NW,OL,OX,PA,PE,PH,PL,PO,PR,RG,RH,RM,S,SA,SE,SG,SK,SL,SM,SN,SO,
SP,SR,SS,ST,SW,SY,TA,TD,TF,TN,TQ,TR,TS,TW,UB,W,WA,WC,WD,WF,WN,WR,WS,WV,Y
O,ZE";
// outcode formats
var pcout = "AN,ANN,AAN,AANN,ANA,AANA";
// make sure the basic syntax is OK including the incode
characters (no C,I,K,M,O,V)
if (NOT refind('^([[:digit:]A-Z]){2,4}[
]{1}[[:digit:]][ABDEFGHJLNPQRSTUWXYZ]{2}$', arguments.postcode)) {
return false; }
// loop through each outcode format
for (i = 1; i LTE listlen(pcout); i = i+1) {
// replace the A/N placeholders with valid class names
regex = replacelist(listgetat(pcout, i), 'A,N',
'[A-Z],[[:digit:]]');
// check if it matches
if (refind(regex, listgetat(arguments.postcode, 1, ' '))) {
// now grab the given postcode area
pca = refind('^([A-Z]+)', arguments.postcode, 1, true);
if (arraylen(pca.len)) {
// check that the postcode area is valid
if (listfind(pcalist, left(arguments.postcode,
pca.len[1]))) {
// yes, so we've got a valid postcode!
return true;
}
}
}
}
// if we get here then fail
return false;
</cfscript>
</cffunction>
Tim.
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