--- /dev/null
+<?PHP // $Id$
+ // This function fetches math. images from the data directory
+ // If not, it obtains the corresponding TeX expression from the cache_tex db table
+ // and uses mimeTeX to create the image file
+
+ $nomoodlecookie = true; // Because it interferes with caching
+
+ require_once("../../config.php");
+
+ $CFG->texfilterdir = "filter/tex";
+ $CFG->teximagedir = "filter/tex";
+
+ error_reporting(E_ALL);
+ $texexp = urldecode($_SERVER['QUERY_STRING']);
+ $texexp = str_replace('formdata=','',$texexp);
+
+ if ($texexp) {
+ //$texexp = stripslashes($texexp);
+ $lifetime = 86400;
+ $image = md5($texexp) . ".gif";
+ $filetype = 'image/gif';
+ if (!file_exists("$CFG->dataroot/$CFG->teximagedir")) {
+ make_upload_directory($CFG->teximagedir);
+ }
+ $pathname = "$CFG->dataroot/$CFG->teximagedir/$image";
+ switch (PHP_OS) {
+ case "Linux":
+ system("$CFG->dirroot/$CFG->texfilterdir/mimetex.linux -e $pathname ". escapeshellarg($texexp) );
+ break;
+ case "WINNT":
+ case "WIN32":
+ case "Windows":
+ $texexp = str_replace('"','\"',$texexp);
+ system("$CFG->dirroot/$CFG->texfilterdir/mimetex.exe -e $pathname \"$texexp\"");
+ break;
+ case "Darwin":
+ system("$CFG->dirroot/$CFG->texfilterdir/mimetex.darwin -e $pathname ". escapeshellarg($texexp) );
+ break;
+ }
+ if (file_exists($pathname)) {
+ $lastmodified = filemtime($pathname);
+ header("Last-Modified: " . gmdate("D, d M Y H:i:s", $lastmodified) . " GMT");
+ header("Expires: " . gmdate("D, d M Y H:i:s", time() + $lifetime) . " GMT");
+ header("Cache-control: max_age = $lifetime"); // a day
+ header("Pragma: ");
+ header("Content-disposition: inline; filename=$image");
+ header("Content-length: ".filesize($pathname));
+ header("Content-type: $filetype");
+ readfile("$pathname");
+ } else {
+ echo "Image not found!";
+ }
+ exit;
+ }
+?>
+
+<html>
+<head><title>mimeTeX Previewer</title></head>
+<body>
+ <p>Now enter your own expression or use the sample provided,
+ press the Submit button, and mimeTeX's rendering should be
+ displayed in the little window immediately below it.
+ <center>
+ <form action="texed.php" method="get"
+ target="inlineframe">
+ <input type="text" name="formdata" size=50
+ value="\Large f(x)=\Bigint_{-\infty}^x~e^{-t^2}dt">
+ <input type="submit">
+ </form> <br> <br>
+ <iframe name="inlineframe" align="middle" width="80%" height="100">
+ <p>Something is wrong...</p>
+ </iframe>
+ </center> <br>
+</body>
+</html>
projects / moodle.git / commitdiff