Title: HDWebmobile Formula Pricing Author: HDWebMobile Published: অক্টোবৰ 13, 2026 Last modified: অক্টোবৰ 14, 2026 --- প্লাগিনৰ সন্ধান কৰক ![](https://ps.w.org/hdwebmobile-formula-pricing/assets/banner-772x250.png?rev=3745071) ![](https://ps.w.org/hdwebmobile-formula-pricing/assets/icon-256x256.png?rev=3745071) # HDWebmobile Formula Pricing [HDWebMobile](https://profiles.wordpress.org/htrxuan/)-ৰ দ্বাৰা [ডাউনল’ড কৰক](https://downloads.wordpress.org/plugin/hdwebmobile-formula-pricing.1.0.0.zip) * [বিশদ বিৱৰণ](https://as.wordpress.org/plugins/hdwebmobile-formula-pricing/#description) * [পৰ্য্যালোচনা](https://as.wordpress.org/plugins/hdwebmobile-formula-pricing/#reviews) * [ইনষ্টলেশ্যন](https://as.wordpress.org/plugins/hdwebmobile-formula-pricing/#installation) * [বিকাশ](https://as.wordpress.org/plugins/hdwebmobile-formula-pricing/#developers) [সাহায্য](https://wordpress.org/support/plugin/hdwebmobile-formula-pricing/) ## বৰ্ণনা HDWebmobile Formula Pricing lets customers enter measurements or quantities on the product page, and prices the product live from a formula you write using those field names (e.g. `10 + width * height * 0.05` for a custom-cut material priced by area). This is a common real need for stores selling custom-sized fabric, framed prints, engraved items, or anything priced by dimension or quantity, not just a flat number. #### Security by design The simplest way to implement formula-based pricing — passing the merchant’s formula text straight into PHP’s `eval()` at calculation time — is also the most dangerous: it turns any formula input into a remote code execution path. This plugin closes that entire vulnerability class by construction: * The formula is tokenized character-by-character into a strict set of allowed pieces: numbers, your own configured field names, and the four arithmetic operators plus parentheses. Anything else in the formula text — any other letter sequence, any function-call-looking pattern, any special character — causes the formula to be rejected outright when you save it. * The token stream is evaluated by a small hand-written arithmetic parser. There is no `eval()`, no `create_function()`, no dynamic function dispatch of any kind anywhere in this plugin — the only operations that can ever run are addition, subtraction, multiplication, and division of plain numbers. * The customer-facing live price preview also never exposes your formula to the browser: it’s computed by an AJAX call back to your own server, through the exact same safe evaluator used at checkout, so the formula text itself is never sent to a visitor’s browser. * The real price used at checkout is always recomputed server-side from the product’s own stored fields and formula — never trusted from what the browser submitted. #### Key Features * Add up to 6 numeric input fields per product (label, variable name, min/max bounds, default value) * Write a formula referencing those fields by name — validated for safety the moment you save it * Live price preview on the product page as the customer types, computed server- side * Optional minimum/maximum price clamps, so no combination of inputs can produce an unreasonable price * Every field’s min/max bounds are enforced again server-side at add-to-cart time, not just in the browser * Field values show on the cart, checkout, and order screens exactly as entered #### Limitations (please read before installing) * Simple products only in this version — no variable-product support * Formulas support only +, -, *, /, and parentheses (no exponents, square roots, or conditional logic) — deliberately, since a richer grammar is a larger safety surface to get right * No formula “test” button in the admin beyond the save-time validation — if a formula is rejected, the error message names exactly what’s wrong (an unknown variable, a bad character, division by zero with the values you tried) * Requires a Regular Price to be set on the product (even a nominal placeholder)— this is standard WooCommerce behavior for any product with no price at all, not something this plugin can work around #### Enjoying this plugin? If it helps your site, please consider [leaving an honest review on WordPress.org](https://wordpress.org/support/plugin/hdwebmobile-formula-pricing/reviews/#new-post)— it helps other WordPress users find it. Found a problem or have an idea? Please [open a support topic](https://wordpress.org/support/plugin/hdwebmobile-formula-pricing/) first so it can be fixed. ### How to Use #### 1. Add your input fields On a simple product’s “Formula Pricing” tab, click “+ Add Field” for each number the customer should enter (e.g. “Width in cm” with variable name `width`). Set a minimum, an optional maximum, and a default value for each. #### 2. Write the formula In the Formula box, write an expression using your field names exactly as shown, e.g. `10 + width * height * 0.05`. Save the product — if the formula uses anything other than your field names, numbers, and `+ - * / ( )`, you’ll see exactly what’s wrong and the formula won’t be saved until it’s fixed. #### 3. What the customer sees The product page shows your input fields above the Add to Cart button, with a live estimated price that updates as they type. The real price is confirmed the moment the product is actually added to the cart. #### 4. Keeping prices sane Set an optional minimum and/or maximum price on the same tab — no matter what a customer enters (within their allowed field ranges), the final price is clamped to stay within those bounds. ## স্ক্ৰীনশ্বট [⌊The Formula Pricing tab on a product's edit screen -- fields and formula configuration.⌉⌊ The Formula Pricing tab on a product's edit screen -- fields and formula configuration .⌉[ The Formula Pricing tab on a product’s edit screen — fields and formula configuration. [⌊The customer-facing input fields and live price preview on the product page.⌉⌊ The customer-facing input fields and live price preview on the product page.⌉[ The customer-facing input fields and live price preview on the product page. [⌊A cart line item showing the entered measurements alongside the computed price.⌉⌊ A cart line item showing the entered measurements alongside the computed price.⌉[ A cart line item showing the entered measurements alongside the computed price. ## ইনষ্টলেশ্যন 1. Upload the plugin files to the `/wp-content/plugins/hdwebmobile-formula-pricing` directory, or install the plugin through the WordPress plugins screen directly. 2. Activate the plugin through the ‘Plugins’ screen in WordPress. WooCommerce must already be installed and active. 3. Edit a simple product, open its new “Formula Pricing” tab under Product Data, add your fields and formula. 4. On the product’s “General” tab, set a Regular Price — WooCommerce hides the entire purchase form on a product with no price at all, even with formula pricing enabled, so enter at least a nominal placeholder amount (it will be overridden the moment a customer enters a value). ## পৰ্য্যালোচনা এই প্লাগিনৰ বাবে কোনো পৰ্য্যালোচনা নাই। ## অৱদানকাৰী আৰু বিকাশকাৰীসকল “HDWebmobile Formula Pricing” হৈছে মুক্ত উৎসৰ ছফ্টৱেৰ। এইসকল লোকে এই প্লাগিনত অৱদান আগবঢ়াইছে। অৱদানকাৰীসকল * [ HDWebMobile ](https://profiles.wordpress.org/htrxuan/) [আপোনাৰ ভাষাত “HDWebmobile Formula Pricing” অনুবাদ কৰক।](https://translate.wordpress.org/projects/wp-plugins/hdwebmobile-formula-pricing) ### বিকাশৰ প্ৰতি আগ্ৰহী? [ক’ড ব্ৰাউজ কৰক](https://plugins.trac.wordpress.org/browser/hdwebmobile-formula-pricing/), [SVN ৰিপজিটৰী](https://plugins.svn.wordpress.org/hdwebmobile-formula-pricing/) চাওক নাইবা [RSS](https://plugins.trac.wordpress.org/log/hdwebmobile-formula-pricing/?limit=100&mode=stop_on_copy&format=rss)- দ্বাৰা [বিকাশৰ পঞ্জী](https://plugins.trac.wordpress.org/log/hdwebmobile-formula-pricing/) ছাবস্ক্ৰাইব কৰক। ## সলনি-পঞ্জী #### 1.0.0 * Initial release: per-product numeric input fields, safe formula evaluation via a hand-written tokenizer and recursive-descent parser (no eval()), server-side live price preview via AJAX, min/max price clamping, field values shown on cart/ checkout/order screens. ## মেটা * **1.0.0** সংস্কৰণ * **3 দিন আগত** শেষবাৰ আপডে’ট হৈছিল * সক্ৰিয় ইনষ্টলেশ্যন **10টাতকৈ কম** * WordPress-ৰ সংস্কৰণ ** 6.9 বা তাতকৈ ওপৰৰ ** * ইমানলৈকে পৰীক্ষা কৰা হৈছে **7.1.3** * PHP-ৰ সংস্কৰণ ** 7.4 বা তাতকৈ ওপৰৰ ** * ভাষা * [English (US)](https://wordpress.org/plugins/hdwebmobile-formula-pricing/) * [calculator](https://as.wordpress.org/plugins/tags/calculator/)[Custom Pricing](https://as.wordpress.org/plugins/tags/custom-pricing/) [dynamic pricing](https://as.wordpress.org/plugins/tags/dynamic-pricing/)[formula](https://as.wordpress.org/plugins/tags/formula/) [woocommerce](https://as.wordpress.org/plugins/tags/woocommerce/) * টেগবোৰ * [উচ্চখাপৰ ভিউ](https://as.wordpress.org/plugins/hdwebmobile-formula-pricing/advanced/) ## ৰে’টিংবোৰ এতিয়ালৈ কোনো পৰ্য্যালোচনা দাখিল কৰা হোৱা নাই। [Your review](https://wordpress.org/support/plugin/hdwebmobile-formula-pricing/reviews/#new-post) [সকলো পৰ্য্যালোচনা চাওক](https://wordpress.org/support/plugin/hdwebmobile-formula-pricing/reviews/) ## অৱদানকাৰীসকল * [ HDWebMobile ](https://profiles.wordpress.org/htrxuan/) ## সাহায্য কিবা ক’বলগীয়া আছে? সহায় লাগে? [সাহায্যৰ ফ’ৰাম চাওক](https://wordpress.org/support/plugin/hdwebmobile-formula-pricing/) ## দান কৰক আপুনি এই প্লাগিনৰ উন্নতিৰ প্ৰতি সাহায্য আগবঢ়াব বিচাৰেনে? [ এই প্লাগিনক অনুদান দিয়ক ](https://paypal.me/htrxuan/20)