Code Engine – PHP Snippets, AI Functions & Automation for WordPress vs BreznFlow

BreznFlow turns n8n workflow JSON exports into interactive, zoomable SVG diagrams inside WordPress. Paste your workflow, and the plugin renders every node with brand-accurate colors, connection lines, and clickable detail panels — directly in your posts and pages. The plugin was built for mifupa.com, a personal blog where n8n automations are documented regularly. Screenshots get outdated. Embedding the n8n editor is impractical. BreznFlow solves this: one shortcode, one interactive diagram, zero external dependencies. Learn more Website: breznflow.com FAQ: breznflow.com/faq Live demo: breznflow.com/demo At a glance Renders n8n workflow JSON as interactive SVG diagrams with zoom, pan, and click 86 node types with brand-accurate colors and icons (OpenAI, Slack, GitHub, Telegram, and more) Click any node to inspect its parameters in a detail panel below the diagram Automatically masks API keys, tokens, and secrets before storage — the raw JSON is never saved 3-step import wizard: paste JSON, configure display, preview and publish 5 built-in themes (Dark, Light, Minimal, Tech, Brezn) plus custom theme import Shortcode [breznflow id="X"] with 13 attributes for per-instance configuration Action bar with share, embed, get JSON, and download actions Standalone embed page for iframe integration Related workflows by shared node types View counter and AI detection badges Zero dependencies — vanilla JavaScript, no external CDN, no tracking What makes BreznFlow different No external services. Everything runs locally inside WordPress. No CDN, no SaaS, no API calls during page loads. Security first. Sensitive data (API keys, tokens, secrets) is automatically detected and replaced with [REDACTED] before storage. The raw workflow JSON is never saved. Real interactivity. Not a static image — visitors can zoom, pan, and click nodes to see their configuration. Vanilla JavaScript. No React, no jQuery, no build step. The renderer is a single JS file that generates SVG elements directly. Built for real sites. Running on the developer’s own production sites since version 1.0. Display modes Visual — full diagram with toolbar, detail panel, and action bar Info — node counts only (InfoBox summary like “3× HTTP Request, 2× Code”) — no diagram Compact — diagram without toolbar or action bar Theme system 5 built-in themes: Dark (default), Light, Minimal, Tech, and Brezn. Custom themes can be imported as .breznflow.json files containing 41 CSS color tokens. Themes are selectable globally, per workflow, or per shortcode. Node type registry 86 predefined node types across 10 categories: Triggers, Core Logic, Data Transformation, Databases, Communication, Google, Dev Tools, AI, Storage, and CRM/Marketing. Unknown node types get a deterministic fallback with auto-generated colors — the same unknown type always looks the same. Sensitive data masking Before saving, BreznFlow runs a two-pass sanitization: All strings pass through WordPress sanitization Secret detection scans for API keys in URL parameters, sensitive header values (Authorization, Bearer, X-API-Key), and high-entropy condition values A masking log records every redaction with reason and context — visible in the wizard preview. Action bar Below the diagram, the action bar provides four configurable actions: Share — article link and anchor link for hash navigation Embed — iframe embed code for standalone embedding Get JSON — formatted JSON display with file size Download — sanitized JSON file download Each action can be enabled/disabled globally, per workflow, or per shortcode. Embed and Download use dual-gate security (global setting AND per-post permission). External Services This plugin optionally connects to external services only when you explicitly use the “Import from URL” feature in the workflow import wizard. Import from URL If you choose to import a workflow by pasting a URL instead of uploading or pasting JSON directly, the plugin makes an HTTP request to that URL using WordPress’s built-in wp_remote_get() function. When: Only when you click the “Fetch” button in the Add Workflow wizard What is sent: Only the URL you provide — no WordPress data, no user data, no cookies To whom: Whatever server hosts the URL you provide Privacy policy: Depends on the server you connect to No data is transmitted automatically. No data is sent during normal page loads or to visitors browsing your site. For security, requests to private and internal network addresses are blocked: localhost, 127.0.0.0/8, 10.0.0.0/8, 172.16.0.0/12, 192.168.0.0/16, and cloud metadata endpoints (e.g. 169.254.169.254).

Code Engine is a snippets manager that doesn’t stop at snippets. Yes, it runs your PHP and JavaScript exactly where and when you want: frontend, backend, on a schedule, or inside your content. But its real magic is what happens after you write a function: the same little piece of code instantly becomes a tool your AI chatbots can call, a step you can drag into a visual workflow, and an endpoint the outside world can trigger. One function, three superpowers. Most “code snippets” plugins stop at a textarea and a toggle. Code Engine treats your functions as first-class building blocks for the whole Meow Apps ecosystem, and for anything that can speak REST. Think out of the box, let your creativity flow, because the possibilities really are endless! ✨ For more, check the official website and come say hi on the Discord. Quick Intro Hello! ☀️ I built Code Engine because I was tired of pasting mystery snippets into functions.php and praying. I wanted a place where small bits of code are organized, safe, AI-assisted, and reusable everywhere. Here’s the idea. You write a function (or let the AI write it for you from a plain-English description). That function immediately shows up in three places: AI Engine: your chatbots and MCP clients (Claude, ChatGPT, Claude Code) can call it as a tool, with real arguments. Ask “how many orders shipped today?” and your chatbot runs your function to answer. Workflow Engine: your function appears in the step picker as its very own block. Drag it onto the canvas, wire it between an AI step and a Slack step, done. No glue code. REST / External tools: give it a secure endpoint and a token, then trigger it from Make.com, n8n, Zapier, a cron job, or a webhook. You never wrote an “integration.” You just wrote a function. Code Engine did the rest. 🤝 Core Modules 🧩 Snippets Manager Backend, Frontend, Persistent, Scheduled, Functions, and in-content (PHP/JS) snippets, all in one clean dashboard with tags, search, scope filters, and priorities. 🪄 AI-Assisted Coding Describe what you want in plain English and let AI Engine write the snippet: code, name, arguments, and scope included. Refine existing code or implement it straight from your comments. 🤖 Functions as AI Tools Every Function snippet becomes a function-calling tool and an MCP tool, so your AI Engine chatbots (and external AI agents) can actually do things on your site, not just talk. 🔀 Functions as Workflow Steps Workflow Engine surfaces each of your functions as its own draggable step. Your custom logic becomes a first-class citizen on the automation canvas. 🌐 External Access (REST) Expose any runnable snippet through a secured REST endpoint with a bearer token. Perfect for Make.com, n8n, webhooks, and scheduled external jobs. 🛡️ Safe Mode A snippet that throws a fatal error is automatically caught and disabled before it can take your site down. Code with confidence. ⏰ Scheduling Run a snippet daily at a chosen time via WP-Cron (reports, cleanups, syncs) without touching the server crontab. 🧱 Code Blocks & Shortcodes (Pro) Drop PHP or JS straight into a post or page with a Gutenberg block or the [code-engine] shortcode, with safety guards. 🧩 Snippets, the way they should be Code Engine organizes your code by scope, so each snippet runs exactly where it belongs: Persistent: runs everywhere (frontend and backend). Your everyday “add this to functions.php” code, but managed. Frontend: runs only on the public site. Backend: runs only in the admin. Function: a named, callable function with typed arguments and defaults. This is the reusable building block (see below). Scheduled: runs on a WP-Cron schedule, at the hour and minute you pick. Content (PHP / JS): runs inside a specific post or page, via a Gutenberg Code Block or the [code-engine] shortcode (Pro). Everything is searchable, taggable, sortable by priority, and importable/exportable. The CodeMirror editor gives you proper syntax highlighting and keyboard shortcuts (Cmd+S to save, Cmd+Enter to run). A nikic/php-parser pass validates your PHP before it ever runs. 🪄 Let AI write it for you Don’t feel like writing the boilerplate? Describe the snippet in plain language and Code Engine, powered by AI Engine, generates the whole thing: the code, a sensible name, a description, the right scope, and, for functions, the argument list with names, types, and defaults. Already have code? Ask the AI to modify it from a prompt, or write a few comments describing what you want and let it fill in the implementation. It’s pair programming, right inside your dashboard. ✨ The big idea: write once, use everywhere This is what makes Code Engine different. A Function snippet is not just code you call from other code. It’s a reusable capability that the rest of your stack can plug into. The moment you save it, the same function is available in three places at once: 1. As an AI tool, for chatbots and AI agents With AI Engine active, your functions are exposed through function calling and over MCP (Model Context Protocol). Your on-site chatbot can run them mid-conversation, and external AI agents (Claude, Claude Code, ChatGPT, OpenClaw) can call them too. Want a chatbot that checks stock, looks up a booking, or kicks off a process? Write the function; the chatbot gains the skill. 2. As a workflow step, for automation With Workflow Engine, every active function shows up in the Add-step picker as its own block, named after your snippet, with one input per argument. Drag it onto the canvas and wire it between other steps: an AI step that summarizes, your function that saves, a Social Engine step that posts. There’s also a generic “Execute snippet (by ID / by name)” step when you want to call one dynamically. You never write integration code; your function is the integration. 3. As a REST endpoint, for the outside world Give a snippet a custom endpoint name and a bearer token, and it’s instantly callable from anywhere: POST /wp-json/code-engine/v1/snippets-endpoint/your-endpoint Pass arguments as JSON in the body, secure it with a token, and trigger it from Make.com, n8n, Zapier, GitHub Actions, or a humble cron job. Automation without a middleware bill. 🛡️ Safe by default Running arbitrary code is powerful, so Code Engine takes safety seriously: Safe Mode catches fatal errors and auto-disables the offending snippet, so a typo never white-screens your site. REST whitelisting means global snippets only run on trusted REST routes by default, so you choose what to open up. Per-snippet tokens secure your external endpoints. Validation with a real PHP parser before code is saved. For developers who want fewer guardrails, there’s a “Bypass REST Security” option and filters (mwcode_rest_authorized, mwcode_rest_whitelist) to tailor exactly what’s allowed. Works beautifully with the Meow Apps family Code Engine is one engine in a connected set, each one useful alone, magical together: AI Engine: chatbots, content generation, and MCP. Turns your functions into AI tools. Workflow Engine: visual automation. Turns your functions into draggable steps. SEO Engine: smart, lightweight AI SEO. Social Engine: schedule and automate social posts. Why Code Engine? Reusable, not throwaway Other snippet plugins give you a place to paste code. Code Engine gives you a place to build capabilities that your AI, your workflows, and your external tools can all use. Native to WordPress Clean, fast, and built the WordPress way. No clunky external dashboards, no bloat. AI-native Write snippets with AI, expose them to AI. The whole loop lives in your wp-admin. Developer friendly REST API, MCP tools, function calling, scheduling, import/export, and plenty of filters to hook into. Cared for Part of the Meow Apps family, with regular updates and a real human behind it. 💕