Functions

Function Library

Reusable pure PHP functions for everyday application and LAMP stack work.

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Discount Rule Evaluator

Applies coupon or automatic discount rules and returns explainable results.

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Tax Region Resolver

Determines the tax region from shipping/billing address and configured rules.

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Shipping Rate Selector

Chooses eligible shipping rates based on cart weight, value, destination, and carrier rules.

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Inventory Reservation Planner

Plans stock reservations for checkout without immediately reducing inventory incorrectly.

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Invoice Line Builder

Builds invoice-ready line items from cart/order records.

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Refund Eligibility Checker

Checks order status, payment status, age, and item rules before allowing refund.

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Customer Lifetime Value Summary

Summarizes order count, revenue, refunds, average order, and first/last purchase.

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Abandoned Cart Detector

Finds carts inactive beyond a threshold and classifies recovery eligibility.

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Admin Flash Message Queue

Stores one-time admin flash messages by type and scope.

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Bulk Action Validator

Validates selected IDs, action name, CSRF, and permission before bulk admin actions.

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Admin Table State Builder

Builds filter, search, pagination, and sort state for admin tables.

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Form Sticky Value Builder

Builds safe form values after validation errors without reusing unsafe raw input.

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