generating unparalleled codes php/mysql?


i'm operative fan needs beget millions alphanumeric codes used repository scratch-off cards, bottlecap prizes, on. have brief adequate imitation cap, wish certain obscure characters 1 i, 0 o, etc. included, have definitely stored destiny -- can't only have an algorithm determines 'validity' someone tries redeem one. finally, wish certain codes incidentally distributed inside infinite "code space" can't only speculation additional codes walking by alphabet.



are there any pointers towards graceful fit algorithms generating kinds formula sets? i've scratched few out behind an envelope, nonetheless problem smells trap unwary.



Comments

Post a Comment

Popular posts from this blog

why does floated <input> control floated component slip over too distant right ie7, nonetheless firefox?

Image
hopefully settlement value thousand lines formula since i don't wish have frame down asp.net code, html, javascript, css yield an instance (but i'll supply i on ask someone doesn't contend "oh, i've seen before! try this...") [actually, i post formula css - bottom question]. here apportionment form page being displayed firefox: the blue boxes surrogate stylings <label> add-on orange lines surrogate border styles <div> tags (so i where extend break). <label> 's styled float: left <div 's right. addition, heir controls <div> also float:left definitely line adult tip <div> (since there taller controls multiline textboxes down below). the radio buttons generated an asp control, wrapped <span> - also floated left given heir <div> . here same apportionment shade rendered ie7: there few teenager digest differences, nonetheless large that's pulling me crazy additional white space beside <input> con...
Read more

grails record upload problems

i'm perplexing heed record upload formula grails website, i'm controlling problems. i'm controlling same formula found . here code: <g:form action="upload" method="post" enctype="multipart/form-data"> <input type="file" name="myfile" /> <input type="submit" value="upload" /> </g:form> and def upload = { def f = request.getfile('myfile') if(!f.empty) { flash.message = 'success' } else { flash.message = 'file can't empty' } } i'm receiving following blunder during runtime: message: signature method: org.mortbay.jetty.request.getfile() convenient justification types: (java.lang.string) values: {"myfile"} caused by: groovy.lang.missingmethodexception: signature method: org.mortbay.jetty.request.getfile() convenient justification types: (java.lang.string) values: {"myfile"} ...
Read more

how i emanate permitted url asp.net mvc?

how i beget permitted urls within asp.net mvc framework? example, we've got url looks this: http://site/catalogue/browsebystylelevel/1 the 1 id inspect turn (higher case) browse, nonetheless i'l reformat url same proceed does it. for example, twin urls take same place: edit: permitted biased url referred slug .
Read more