=== WP QuickLaTeX ===
Contributors: advanpix, cityjin, kirkpatrick 
Donate link: http://www.holoborodko.com/pavel/quicklatex/
Tags: latex, math, TikZ, gnuplot, equations, QuickLaTeX.com, plot, SVG
Stable tag: 3.8.6
Requires at least: 2.8
Tested up to: 5.0.2

Advanced LaTeX plugin. Native LaTeX syntax. Allows custom preamble, TikZ and other packages. Zoom-independent visual quality (SVG).

== Description ==

Insert formulas & graphics in the posts and comments using native LaTeX shorthands directly in the text. Inline formulas, displayed equations auto-numbering, labeling and referencing, AMS-LaTeX, <code>TikZ</code>, custom LaTeX preamble. No LaTeX installation required. Easily customizable using UI page. Actively developed and maintained. Visit <a href="http://www.holoborodko.com/pavel/quicklatex/">QuickLaTeX homepage</a> for more info. 

*  Standard LaTeX expressions can be cut and pasted directly into WordPress posts, pages, and comments; display environments require no enclosures, other expressions require only a surrounding <code>$..$</code> or <code>\[..\]</code>.  No need for enclosing tags <code>[latex] ... [/latex]</code>.
*  Correct vertical positioning of inline formulas relative to baseline of surrounding text. Say “NO” to jumpy equations produced by other plugins!
*  SVG vector graphics support, so that formulas are crisp regardless of scaling in browser.
*  (AMS)LaTeX displayed math environments support: <code>equation, align, gather, multiline, flalign, alignat,</code> etc.
*  Automatic numbering of displayed equations. Override autonumbering with `\tag{}` LaTeX command.
*  Equation hyper-referencing by standard LaTeX rules with `\label{}`, `\ref{}`.
*  Custom LaTeX document preamble, allowing added <code>\usepackage{}</code> and <code>\newcommand{}</code>.
*  <code>TikZ</code> and <code>pgfplots</code> graphics package support.
*  Preview formulas in comments before publishing. Additionally [AJAX Comment Preview](http://blogwaffe.com/ajax-comment-preview/) plugin should be installed to enable this feature.
*  Meaningful error messages for mistakes in LaTeX code.
*  Precise font properties tuning: <code>size, text and background color</code>. 
*  Easy style customization using UI or CSS file.
*  No LaTeX installation is required. 
*  QuickLaTeX.com automatically provides formula images, which are then cached on user's server.
*  Administrative settings page for setting global parameters; AJAX-ified.

Just place LaTeX math expressions into your text and enable QuickLaTeX on the page by <code>[latexpage]</code> command.
WP QuickLaTeX will convert them to high-quality images and embed into post. Inline formulas will be properly aligned with the text.
Displayed equations will be auto-numbered by LaTeX rules.
To see plugin in action please visit math-pages on my blog, e.g. [Central Differences](http://www.holoborodko.com/pavel/numerical-methods/numerical-derivative/central-differences/),
[Cubature formulas for the unit disk](http://www.holoborodko.com/pavel/numerical-methods/numerical-integration/cubature-formulas-for-the-unit-disk/), [Smooth noise robust differentiators](http://www.holoborodko.com/pavel/numerical-methods/numerical-derivative/smooth-low-noise-differentiators/), etc.

== Screenshots ==

1. LaTeX - enabled post in WordPress editor.
1. Same post - published.
1. TikZ drawing inclusion (up: source code in the post editor, down: published post).
1. Admin page - Basic settings.
1. Admin page - LaTeX Syntax Sitewide & Custom preamble
1. Admin page - Image format and other system settings.
1. Debug Mode - Error message triggered by misspelled `\sqrt` command.

== Installation ==

WP QuickLaTeX is based on the free web service [QuickLaTeX.com](http://quicklatex.com/) and doesn't require 
LaTeX to be installed on user's server or hosting account. Just install the plugin and you are good to go.

* Download WP QuickLaTeX plug-in.
* Unzip the plugin file and upload its content to `wp-content/plugins` folder of your blog.
* Activate WP-QuickLaTeX through the 'Plugins' menu in Wordpress, adjust its settings if needed.

== Frequently Asked Questions ==

= How do I add LaTeX to my posts? =
There are three possible ways:

* Place <code>[latexpage]</code> somewhere on the page, post, or comment. Place LaTeX expression surrounded by <code>$..$, \[..\]</code> or a display environment <code>\begin(equation}..\end{equation}</code> (or <code>align, gather, multiline, flalign, alignat</code>). 
* Enable 'Use LaTeX Syntax Sitewide'; then it is not necessary to place <code>[latexpage]</code>.
* Wrap formulas with <code>[latex] ... [/latex]</code> (this gives compatibility with previously-written "legacy" pages). 

In any case plugin will do automatic/custom equation numbering based on LaTeX rules.  
Check [plugin home page](http://www.holoborodko.com/pavel/quicklatex/) for more information on features, examples, tips & tricks.

= How can I send bug reports or request new feature? =

Please use comments on the plugin's web page [WP-QuickLaTeX](http://www.holoborodko.com/pavel/quicklatex/).
I'll do my best to help you.

== Change Log ==

= 3.8.6 =
* Plugin and servers have been switched to work in HTTPS mode.

= 3.8.5 =
* Fixed issue with retrieving settings from database reported by Ned Zimmerman.
* Minor code polishes to silence the notices from PHP interpreter. 

= 3.8.4 =
* Added compatibility with PHP7.

= 3.8.3 =
* Image size reduction using OptiPNG.
* Minimized memory usage. Useful for restricted PHP configurations.

= 3.8.2 =
* Added support for `$latex ... $` syntax for easy switching from WP-LaTeX ;).
* Server has been upgraded. Now QuickLaTeX server is located in Germany.

= 3.8.1 =
* Switched to non-blocking connection with server to avoid delays/freeze if server is down.

= 3.8.0 =
* Added rendering to SVG.
* Fixed minor bug on a server side.

= 3.7.9 =
* Fixed critical bug in parsing. Update is strongly recommended.
* Minor changes in settings page.

= 3.7.8 =
* Diagnostics on HTTP connection errors caused by server/PHP configuration have been added.

= 3.7.7 =
* Server has been updated to include newest packages and changes.
* Settings page has been improved.
* Fixed few minor bugs in plugin.
* Improved rendering of TikZ pictures with overlays.
* Improved support of chemistry-related packages: ChemFig, myChemistry.

= 3.7.6 =
* Fixed sanitization of LaTeX source code to be placed in `alt` attribute. Now QuickLaTeX markup passes HTML validation without errors/warnings.

= 3.7.5 =
* Added compatibility with [AJAX Comment Preview](http://blogwaffe.com/ajax-comment-preview/) plugin to allow formulas preview in comments before publishing. Just update QuickLaTeX to 3.7.5 and install AJAX Comment Preview. You can test this feature on [any post on my site ](http://www.holoborodko.com/pavel/).

= 3.7.4 =
* Use `!` before `[latexpage]` tag to escape it from processing. 
* Disabled `$$ .. $$` processing on non-[latexpage] pages.

= 3.7.3 =
* Equation hyper-referencing with `\label{}`, `\ref{}`.
* Fixed bug with CSS styles for TikZ drawings. 

= 3.7.2 =
* Fixed vertical misalignment caused by CSS collisions with some "bossy" themes. 

= 3.7.1 =
* Support of native LaTeX syntax embedded directly in the posts. Copy-paste exchange with offline LaTeX papers.
* `TikZ` graphics support, including `pgfplots` and `gnuplot` commands.
* Automatic displayed equations numbering facility; `\tag{}` overrides autonumbering.
* Styles are in separate CSS file now for easy customization.
* Redesign of UI admin page. AJAX submission of options
* Improved rendering quality (PNG image output).
* Support of Thesis theme.
* Numerous small fixes and improvements.
* Server software is updated to support TexLive 2010 package.

= 3.0.0 =
* Server [QuickLaTeX.com](http://quicklatex.com/) and plugin [WP-QuickLaTeX](http://www.holoborodko.com/pavel/quicklatex/) have been completely rewritten. 
* Support of multiline environments.
* Font properties tuning.
* Custom LaTeX document preamble support.
* UI Settings page.

= 2.5.4 =
* Support of the latest Wordpress 3.0.

= 2.5.3 =
* Convert entities from extended HTML symbol table to ASCII for correct compilation by LaTeX.

= 2.5.2 =
* Optimize cURL options to support safe mode.

= 2.5.1 =
* Support of $$!..$$ to center formulas horizontally (*displayed* formulas).

= 2.5 =
* Show detailed error messages from LaTeX compiler.
* Increase speed by formula images caching.
* Support of $$..$$ tags.

= 2.4.1 =
* Increase speed by minor code refactoring.

= 2.4 =
* Increase speed by using cURL if allowed by the server configuration.
* Support of restricted servers with disabled `allow_url_fopen`.

= 2.3 =
* Increase speed by formula properties caching.  

== Upgrade Notice == 

On the first load of the page just after plugin installation QuickLaTeX needs to re-generate cache for the page.
Please allow ample time for this process.