Deciphering an error

[Mercutio]

I got this above the Entmoot logo:

Warning: Unexpected character in input: ' in /home/tolkient/public_html/entmoot/includes/functions_showthread.php(640) : eval()'d code on line 4

Parse error: parse error, unexpected T_STRING in /home/tolkient/public_html/entmoot/includes/functions_showthread.php(640) : eval()'d code on line 4

Warning: Unexpected character in input: ' in /home/tolkient/public_html/entmoot/includes/functions_showthread.php(640) : eval()'d code on line 4

Parse error: parse error, unexpected T_STRING in /home/tolkient/public_html/entmoot/includes/functions_showthread.php(640) : eval()'d code on line 4

Warning: Unexpected character in input: ' in /home/tolkient/public_html/entmoot/includes/functions_showthread.php(640) : eval()'d code on line 4

Parse error: parse error, unexpected T_STRING in /home/tolkient/public_html/entmoot/includes/functions_showthread.php(640) : eval()'d code on line 4
Entmoot

And this below it in the error box:

Unable to add cookies, header already sent.
File: /home/tolkient/public_html/entmoot/includes/functions_showthread.php(640) : eval()'d code
Line: 4

It worked fine when I reloaded, but I was wondering what all ^ meant?