Jiansen Lu's Computing Blog: September 2014

Tuesday, September 30, 2014

PHP, convert latex to pdf

To convert latex to pdf in PHP, first we need to download text live
http://www.tug.org/texlive/acquire-netinstall.html
xelatex executable from text live will be used in PHP
1) In temporary directory, we put the text template as a tex file and run xelatex to convert tex to pdf.
then display pdf file.
Note;

ob_get_contents — Return the contents of the output buffer

tempnam — Create file with unique file name

sys_get_temp_dir — Returns directory path used for temporary files

basename — Returns trailing name component of path

index.php
<?php
        ob_start();
        include 'latex_template.php';
        $outputData .= ob_get_contents();
        ob_end_clean();
        $texFile = tempnam(sys_get_temp_dir(), 'test');
        $base = basename($texFile);

        rename($texFile, $texFile.".tex");
        $texFile .= ".tex";
        file_put_contents($texFile, $outputData);
        chdir(dirname(realpath($texFile)));

        $console = shell_exec("xelatex {$base}");
        header("Content-type: application/pdf");
        $pdf =    dirname(realpath($texFile)).DIRECTORY_SEPARATOR.$base.".pdf";
        readfile($pdf);
?>
latex_template.php
\documentclass[12pt]{article}
\usepackage{lingmacros}
\usepackage{tree-dvips}
\begin{document}

\section*{Notes for My Paper}

Don't forget to include examples of topicalization.
They look like this:

{\small
\enumsentence{Topicalization from sentential subject:\\
\shortex{7}{a John$_i$ [a & kltukl & [el &
{\bf l-}oltoir & er & ngii$_i$ & a Mary]]}
{ & {\bf R-}clear & {\sc comp} &
{\bf IR}.{\sc 3s}-love   & P & him & }
{John, (it's) clear that Mary loves (him).}}
}

\subsection*{How to handle topicalization}

I'll just assume a tree structure like (\ex{1}).

{\small
\enumsentence{Structure of A$'$ Projections:\\ [2ex]
\begin{tabular}[t]{cccc}
    & \node{i}{CP}\\ [2ex]
    \node{ii}{Spec} &   &\node{iii}{C$'$}\\ [2ex]
        &\node{iv}{C} & & \node{v}{SAgrP}
\end{tabular}
\nodeconnect{i}{ii}
\nodeconnect{i}{iii}
\nodeconnect{iii}{iv}
\nodeconnect{iii}{v}
}
}

\subsection*{Mood}

Mood changes when there is a topic, as well as when
there is WH-movement. \emph{Irrealis} is the mood when
there is a non-subject topic or WH-phrase in Comp.
\emph{Realis} is the mood when there is a subject topic
or WH-phrase.

\end{document}
Video: PHP, convert latex to pdf

Monday, September 22, 2014

Add knockout.js in CodeIgniter

CodeIgniter - PHP Model-View-Controller (MVC), can be downloaded from:
https://ellislab.com/codeigniter

knockout.js - JavaScript (MVC) can be downloaded from
http://knockoutjs.com/

Create assests/js folder and copy knockout library knockout-3.2.0.js to this folder.
Under application/controllers, create test.php
<?php
class Test extends CI_Controller {
    public function index() {
        $this->load->helper('url');
        echo '<h2>Add knockout.js in CodeIgniter</h2>';
        $this->load->view('test');
    }
}
?>
Under applications/views folder, create test.php
<!DOCTYPE html>
<html lang="en">
<head>
</head>
<body>
<p>First name: <strong data-bind="text: firstName"></strong></p>
<p>Last name: <strong data-bind="text: lastName"></strong></p>

<p>First name: <input data-bind="value: firstName" /></p>
<p>Last name: <input data-bind="value: lastName" /></p>

<p>Full name: <strong data-bind="text: fullName"></strong></p>

<script type="text/javascript" src="<?php echo base_url('assets/js/knockout-3.2.0.js') ?>"></script>
<script type="text/javascript" src="<?php echo base_url('assets/js/inputname.js') ?>"></script>
</body>
</html>
Under assests/js folder, create inputname.js
// Here's my data model
// This is a simple *viewmodel* - JavaScript that defines the data and behavior of your UI
function AppViewModel() {
    this.firstName = ko.observable("Jiansen");
    this.lastName = ko.observable("Lu");

    this.fullName = ko.computed(function() {
        return this.firstName() + " " + this.lastName();
    }, this);
}
// Activates knockout.js
ko.applyBindings(new AppViewModel());
My case, run: (I create a parent folder MVC0
http://localhost/MVC/CodeIgniter/index.php/test
Video: Add knockout.js in CodeIgniter

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Tuesday, September 30, 2014

PHP, convert latex to pdf

Monday, September 22, 2014

Add knockout.js in CodeIgniter