Checks legitimacy of credit cardPutting [validcard] into a template displays "T" or "F", depending on the value of the number in accountNum. If the accountNum is a legitimate credit card number for the specified card type (according to the algorithm used to create such numbers), then "T" indicates it is good. Conversely, "F" indicates it is bad. This does not call the bank to verify funds on the card -- it merely does a simple numeric checksum to verify the number is consistent with a credit card number, and not a randomly punched in string of numbers. You would use this tag to validate the credit card field on your order form BEFORE writing it to the shopping cart order file. If it evaluates to F, you can display an alert and ask the customer to please double-check the credit card before continuing.
|accountNum||(Required) The credit card number. Any extra spaces or non-numeric characters will be ignored.|
|card||(Optional) Set card to the names of the credit cards that are allowed, separated by space or +. Possible values are ALL, IGNORE, VISA, MC, AMEX, DISC, JCB, DINER. If not specified, then ALL cards are allowed. IGNORE tells it to always pass the card regardless of its checksum.|
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A list of user-submitted tips ...WebDNA reference
A list of all WebDNA instructions...[biotype]
BioType is a behavioral biometrics WebDNA function based on ADGS research and development (from version 8...WebDNA Modules
A list of the currently available modules...WebDNA Libraries
A list of available libraries for WebDNA...Technical Change History
This Technical Change History provides a reverse chronological list of WebDNA changes...
Loops through all the line items in an order file...[waitforfile]
The server waits until the file appears on disk...[spawn]
Creates a new thread to execute WebDNA simultaneously with the current template...[countchars]
Counts the number of letters inside the context...[listchars]
Breaks a string of text into separate characters...[input]