Esponce QR Code Generator

常見問題集

What is QR Code?

QR Code is well described on Wikipedia.

How does the plugin work?

Plugin generates a QR Code image using Esponce API 3.0.
Image is then downloaded and cached so all images are served from a local server.

Why is my QR Code not displayed?

Possibilities:

• A parameter may have wrong value, check parameters, especially ‘size’ and colors.
• Shortcode: syntax may not be valid, try to use UI editor.
• Plugin is out of date, try to update to the latest version.
• Esponce.com is in maintenance mode or API (web service) blocks connections.
• There could be other issues, e.g. bugs or browser/platform issues.

How to use shortcode?

Edit a post and go into HTML mode:

[qrcode content="http://www.esponce.com/" size="90x90" foreground="#1982D1"]

Parameters:

• content – required parameter, content to be encoded in QR Code, e.g. hyperlink, phone number, message
• size – module size (number between 1 and 20) or image size (width x height where both dimensions are equal), e.g. “3” or “100×100”
• padding – distance from edges, value between 0 and 4, each unit is represents one module
• version – defines capacity and overall image size, values from 1 to 40 or empty for auto
• ec – error correction level, values: L, M (default), H, Q
• foreground – module color, color name or #[AA]RRGGBB hex value, default is “black”
• background – background color, color name or #[AA]RRGGBB hex value, e.g. “transparent” or “#00FFFFFF”, default is “white”
• tooltip – text to appear on mouse over (‘title’ attribute)
• alt – text for ‘alt’ attribute
• class – additional CSS class names
• style – additional CSS styles

Note: double quotes are escaped as " and new lines as &br;

A feature is not working as expected. What can I do?

There are some settings you can change. Open esp-qrcode.php in editor (or edit plugin code in WordPress) and change PHP constants:

• ESPONCE_PERMALINK_WITH_QUERY – a value indicating whether to include URL query in permalink: true to add query strings (default value), false for no query strings (smaller QR code)
• ESPONCE_ENABLE_CACHING – enable image caching: true to save generated QR Code image on local server (more reliable), false to always generate new image from web service (frequent content changes)