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Prevent duplicate submission if multiple fields match existing entries

GOAL

Prevents duplicate submissions when a specific combination of fields (Name, Number, Date) matches an existing active entry. If a duplicate is found, shows custom messages on the relevant fields.

CONFIGURATION

  • $forms: Add your form ID as a key, and set the field IDs to check. Then set the corresponding error messages.
  • Optionally set the window_days key to limit check to recent entries. Leave at 0 to remove limit.

NOTES

  • All three fields must match to be considered a duplicate.
  • Dates are normalized to site timezone (Y-m-d) before searching.
  • Can be used for multiple forms by duplicating the inner array with a new form key, etc.
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