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Dir : ~/home/nosc/public_html/latexrender/

Edit File: latex.php

<?php
/**
 * LaTeX Rendering Class - Calling function
 * Copyright (C) 2003 Benjamin Zeiss <zeiss@math.uni-goettingen.de>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 * --------------------------------------------------------------------
 * @author Benjamin Zeiss <zeiss@math.uni-goettingen.de>
 * @version v0.8
 * @package latexrender
 * Revised by Steve Mayer
 * This file can be included in many PHP programs by using something like (see example.php to see how it can be used)
 * 		include_once('/full_path_here_to/latexrender/latex.php');
 * 		$text_to_be_converted=latex_content($text_to_be_converted);
 * $text_to_be_converted will then contain the link to the appropriate image
 * or an error code as follows (the 500 values can be altered in class.latexrender.php):
 * 	0 OK
 * 	1 Formula longer than 500 characters
 * 	2 Includes a blacklisted tag
 * 	3 (Not used) Latex rendering failed
 * 	4 Cannot create DVI file
 * 	5 Picture larger than 500 x 500 followed by x x y dimensions
 * 	6 Cannot copy image to pictures directory
 * 
 * This version includes Mike Boyle's modifications to allow vertical offset of LaTeX formulae
 */

function latex_content($text) {
     //
--------------------------------------------------------------------------------------------------
    
// adjust this to match your system configuration
     $latexrender_path
= "/home/nosc/public_html/latexrender/offset_beta";
    
$latexrender_path_http = "~nosc/latexrender/offset_beta";

// --------------------------------------------------------------------------------------------------

include_once($latexrender_path."/class.latexrender.php");

preg_match_all("#\[tex\](.*?)\[/tex\]#si",$text,$tex_matches);

$latex = new LatexRender($latexrender_path."/pictures",$latexrender_path_http."/pictures",$latexrender_path."/tmp");

for ($i=0; $i < count($tex_matches[0]); $i++) {
 $pos = strpos($text, $tex_matches[0][$i]);
 $latex_formula = $tex_matches[1][$i];

// if you use htmlArea to input the text then uncomment the next 6 lines
	//	$latex_formula = str_replace("&amp;","&",$latex_formula);
	//	$latex_formula = str_replace("&#38;","&",$latex_formula);
	//	$latex_formula = str_replace("&nbsp;"," ",$latex_formula);
	//	$latex_formula = str_replace(" ","",$latex_formula);
	//	$latex_formula = str_replace("","",$latex_formula);
	//	$latex_formula = str_replace("","",$latex_formula);

$url = $latex->getFormulaURL($latex_formula);
        // offset: get depth information from filename
        $filename = basename($url);
        $filename = str_replace("_",".",$filename);
        $farray = explode(".",$filename);
        if (count($farray)>2){
        	$style_css = ' style="vertical-align:-'.$farray[1].".".$farray[2].';" ';
        } else {
        	$style_css = " align=absmiddle";
        }

$alt_latex_formula = htmlentities($latex_formula, ENT_QUOTES);
		$alt_latex_formula = str_replace("\r","&#13;",$alt_latex_formula);
		$alt_latex_formula = str_replace("\n","&#10;",$alt_latex_formula);

if ($url != false) {
 // offset: add vertical alignment in $style_css
 $text = substr_replace($text, "<img src='".$url."' title='".$alt_latex_formula."' alt='".$alt_latex_formula."'.$style_css>",$pos,strlen($tex_matches[0][$i]));
 } else {
 $text = substr_replace($text, "[Unparseable or potentially dangerous latex formula. Error $latex->_errorcode $latex->_errorextra]",$pos,strlen($tex_matches[0][$i]));
 }
 }
 return $text;
}

// offset: repeats the processing to show the normal image without any vertical alignment.
// so only required for comparison purposes
function latex_content_nooffset($text) {
    // --------------------------------------------------------------------------------------------------
    // adjust this to match your system configuration
    $latexrender_path = "/home/domain_name/public_html/latexrender";
    $latexrender_path_http = "/latexrender";