function WF_filter_math($text, $editor)
{
global $TAGS;
$output = '';
$n0 = 0;
// Search for '«math'. If it is not found, the
// content is returned without any modification
$n1 = strpos($text, $TAGS->in_mathopen);
if ($n1 === FALSE) {
return $text;
// directly return the content
}
// filtering
while ($n1 !== FALSE) {
$output .= substr($text, $n0, $n1 - $n0);
$n0 = $n1;
$n1 = strpos($text, $TAGS->in_mathclose, $n0);
if (!$n1) {
break;
}
$n1 = $n1 + strlen($TAGS->in_mathclose);
// Getting the substring «math ... «/math»
$sub = substr($text, $n0, $n1 - $n0);
// remove html entities (such as ")
//Solves BUG 25670 of php 4.3, solved at version 5
if (version_compare(phpversion(), "5.0.0", ">=")) {
$sub = html_entity_decode($sub, ENT_COMPAT, $TAGS->ucharset);
// needs php 4.3 to work, php 5.0 if charset is utf (bug 25670)
} else {
if (strtolower($TAGS->ucharset) == "utf-8") {
$sub = html_entity_decode_utf8($sub);
} else {
$sub = html_entity_decode($sub, ENT_COMPAT, $TAGS->ucharset);
}
}
// replacing '«' by '<'
$sub = str_replace($TAGS->in_open, $TAGS->out_open, $sub);
// replacing '»' by '>'
$sub = str_replace($TAGS->in_close, $TAGS->out_close, $sub);
// replacing '§' by '&'
$sub = str_replace($TAGS->in_entity, $TAGS->out_entity, $sub);
// generate the image code
$sub = WF_math_image($sub, $editor);
// appending the modified substring
$output .= $sub;
$n0 = $n1;
// searching next '«math'
$n1 = strpos($text, $TAGS->in_mathopen, $n0);
}
$output .= substr($text, $n0);
return $output;
}
<?php require_once '../../config.php'; require_once './math_filter.php'; global $TAGS; global $CFG; $var = $_POST["var"]; //We can not do urldecode because it will transform '+' simbols //$var=urldecode($var); WF_initmathfilter(); //require_once($CFG->libdir . '/textlib.class.php'); //$convertor = textlib_get_instance(); //$var = $convertor->convert($var,'utf-8',$TAGS->lcharset); //transforms the mathml to a html image //$var = WF_filter_math($var,TRUE); $var = WF_math_image($var, TRUE); echo $var;
