skodak
64 lines
2.1 KiB
PHP
64 lines
2.1 KiB
PHP
<?PHP // $Id$
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// This function fetches math. images from the data directory
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// If not, it obtains the corresponding TeX expression from the cache_tex db table
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// and uses mimeTeX to create the image file
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define('NO_MOODLE_COOKIES', true); // Because it interferes with caching
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require_once("../../config.php");
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require_once($CFG->dirroot.'/filter/tex/lib.php');
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if (!filter_is_enabled('filter/tex')) {
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error ('Filter not enabled!');
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}
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$texexp = urldecode($_SERVER['QUERY_STRING']);
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$texexp = str_replace('formdata=','',$texexp);
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if ($texexp) {
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$image = md5($texexp) . ".gif";
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$filetype = 'image/gif';
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if (!file_exists("$CFG->dataroot/filter/tex")) {
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make_upload_directory("filter/tex");
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}
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$texexp = str_replace('<','<',$texexp);
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$texexp = str_replace('>','>',$texexp);
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$texexp = preg_replace('!\r\n?!',' ',$texexp);
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$pathname = "$CFG->dataroot/filter/tex/$image";
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$cmd = tex_filter_get_cmd($pathname, $texexp);
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system($cmd, $status);
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if (file_exists($pathname)) {
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require_once($CFG->libdir . '/filelib.php');
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send_file($pathname, $image);
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} else {
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echo "Image not found!";
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}
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exit;
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} else {
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echo "No tex expresion specified";
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}
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?>
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<html>
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<head><title>mimeTeX Previewer</title></head>
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<body>
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<p>Now enter your own expression or use the sample provided,
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press the Submit button, and mimeTeX's rendering should be
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displayed in the little window immediately below it.
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<center>
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<form action="texed.php" method="get"
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target="inlineframe">
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<input type="text" name="formdata" size="50"
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value="\Large f(x)=\Bigint_{-\infty}^x~e^{-t^2}dt" />
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<input type="submit" />
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</form> <br /> <br />
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<iframe name="inlineframe" align="middle" width="80%" height="100">
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<p>Something is wrong...</p>
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</iframe>
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</center> <br />
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</body>
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</html>
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