there is general way to handle the escape character problem. You can use PHP’s str_replace function to backslashes, i.e. take the formula string and add for any \n, \r, \t, \v, \f, \\, \$, \”, \[ und \x etc (that are all escape characters) an additional backslash.

for example. Before passing $latex_formula to wrap_formula($latex_formula), run $latex_formula=latexescapedebug($latex_formula)

function latexescapedebug($tex){
$tex = str_replace(“\n”,”\\n”,$tex);
$tex = str_replace(“\r”,”\\r”,$tex);
$tex = str_replace(“\t”,”\\t”,$tex);
$tex = str_replace(“\v”,”\\v”,$tex);
$tex = str_replace(“\f”,”\\f”,$tex);
$tex = str_replace(“\$”,”\\$”,$tex);
$tex = str_replace(“\[“,”\\[“,$tex);
$tex = str_replace(“\x”,”\\x”,$tex);
$tex = str_replace(“\ “,”\\\ “,$tex);
return $tex;
}

inside wrap_formula() you might try

function wrap_formula($latex_formula) {
…
$string .= “\begin{document}\n”;
$string .= “$”.latexescapedebug($latex_formula).”$\n”;
$string .= “\end{document}\n”;
…
}

I have not tried it so far. if it doesn’t work this will work (it works for me). Add the latexescapedebug inside the latex.php file and add this in the first line.

function latex_content($text) {
$text = latexescapedebug($text); //First Line
…
}

http://www.inkscape.org/

I put together another demo and thought you might be interested.

Thankyou for your help – I’m guessing it was this post that ensured the latest version of LatexRender works with PHP 5.

I am using version 1.0 of LatexRender, although the file class.latexrender.php has a header which says it’s version 0.8.