Drupal site webpages getting 500 in google - drupal

Question

I am working on a site that is having issues when google tries to crawl over it. (I just inherited this site.) Google is returning a 500 error that it can not find the page. I have done some debug but I am stumped on what more to do.
Here is what I know:
When google crawls the site it gets a 500 from some pages. All the pages with the error seem to be "~/content/~" pages.
When I try to manual fetch the page I also get the 500 error message.
The issue only happens sometimes.
Viewing the webpage in a browser gives no indication that anything is wrong.
This is the error message from my error log.
[17-Jul-2013 21:29:58] PHP Parse error: syntax error, unexpected $end in
/home/~/public_html/sites/all/modules/ctools/plugins/access/php.inc(55) : eval()'d code on line 1
Sometime it says line 1 or line 2.
If I comment out the line below, the error goes away. I don't know what the function below does and if getting rid of it does any harm.
// Provide a summary description based upon the checked roles.
function ctools_php_ctools_access_summary($conf, $contexts)
{
return !empty($conf['description']) ? check_plain($conf['description']) : t('No description');
}
I spoke with the hosting company and they said everything is "OK" on their end.
I submitted a question to the google forums and all the tools that they had me run against the site seemed to return successful information.
The problem seems like its getting progressively worse over time.
The apache log does not have any error messages in it.
From the durpal Admin panel - Node template. When I select contexts for the column variant sometimes I get the WSOD.
I don't see any php code anywhere that could be causing an error.
Does anyone have any ideas what could be going on?

Answer 1

PHP Parse error: syntax error, unexpected $end.... if it's the case
means that PHP has finished analyzing your code, but you forgot to close a symbol somewhere in your page or in those that are included.
Check:
you may forgot to close a quote, so PHP continues to analyze your code until it finds the closing quotation-mark.
You may forgot to close a bracket, so from the last opening, PHP thinks all the code that follows as part of a block that never ends.
You may forgot to close a parenthesis, so from the last open parenthesis, it thinks all the code that follows as part of it and that is not ending.
You may forgot a comma