So I've logged onto a client's site this morning (it's an intranet that monitors vehicle usage etc). jQuery is a decent part of the site but all of a sudden it's failed with these console errors: > jquery.js:1Uncaught SyntaxError: > Unexpected token : > www.mydomain.com:21Uncaught > ReferenceError: jQuery is not defined > www.mydomain.com:50Uncaught > ReferenceError: $ is not defined The only thing that I've changed in the past week is adding a charset and altering the doctype to: I think this might be the problem but removing the header() and DOCTYPE doesn't fix the issue. Any ideas what could be going on? Edit 1: Chrome Inspector shows nothing has failed to load. Edit 2: Head Section
Check out Firebug. Is jQuery still getting loaded? Also remove the line break between your PHP code and the doctype declaration