Comments on: Path Problems in Linux

By: Steve

Steve — Tue, 07 Oct 2008 18:08:55 +0000

An alternative method of ensuring \f is not misinterpreted is to use single quotes. Full details at LaTex in WordPress with PHP5.x

By: Steve

Steve — Thu, 11 Sep 2008 19:26:58 +0000

\f is a new escape character in versions 5.2.5 or later of PHP. The replacement by \\f is thus only required for these versions of PHP; \f also only occurs in the offset beta version of latexrender.

By: rec

rec — Thu, 11 Sep 2008 01:32:16 +0000

I was having some path problems that I think had to do with symbolic links on the server confusing the automated script, but what I wanted to mention here (because I can’t find anywhere better) is that once it was ‘working’ the images were filled with garbled text that I eventually discovered quite by accident were the result of \f’s needing to be \\f’s, as the \n’s are \\n’s, presumably because of some kind of end-of-line filtering or whatever, in WordPress 2.6. Basically, from lines 197-224 of class.latexrender.php I had to replace every \f with \\f and now it works fine!

By: simon jackman’s blog » Math in Blogs via LatexRender

simon jackman’s blog » Math in Blogs via LatexRender — Sat, 24 Mar 2007 06:25:09 +0000

[...] following this advice. [...]

By: Matthew Leingang

Matthew Leingang — Tue, 20 Sep 2005 11:37:57 +0000

I was getting the same symptoms and I discovered it was because my convert doesn’t support the -trim option. I was able to get it to work by replacing “-trim” with “-crop 0×0″ in the line defining $command.

By: MarcinGomulka

MarcinGomulka — Sun, 31 Jul 2005 11:29:44 +0000

The directory where ‘gs’ is, needs to be in the $PATH for convert to work correctly.

I have wordpress installed on an university server and they
put ghostscript in an unusual directory.

The following workaround adds the additional directory into the PATH variable:

// class.latexrender.php

// begin of workaround
// extending the PATH environmental variable
$oldpath = getenv(“PATH”);
$where_gs_is = “/usr/sfw/bin”;
if ($oldpath) { $where_gs_is .= “:$oldpath”;}
putenv(“PATH=$where_gs_is”);
// end of workaround

// imagemagick convert ps to image and trim picture
$command = $this->_convert_path.” -density “.$this->_formula_density.
” -trim -transparent “#FFFFFF” “.$this->_tmp_filename.”.ps “.
$this->_tmp_filename.”.”.$this->_image_format;
$status_code = exec($command);