Merge pull request #1194 from jpwhite4/headers

Don't bother trying to set headers if not possible.

configuration/linker.php

@@ -173,7 +173,7 @@ function global_uncaught_exception_handler($exception)
     $exceptionOutput = handle_uncaught_exception($exception);
 
    // If running in a server context...
-    if ($exceptionOutput['isServerContext']) {
+    if ($exceptionOutput['isServerContext'] && !headers_sent()) {
         // Set the exception's headers (if any).
         foreach ($exceptionOutput['headers'] as $headerKey => $headerValue) {
             header("$headerKey: $headerValue");

docs/support.md

@@ -32,9 +32,13 @@ Email `ccr-xdmod-help` at `buffalo.edu` for support.  Please include the followi
 - The output of `xdmod-check-config`
 - PHP and MySQL version (e.g, the output from `php --version`, `mysql --version`, and the SQL command `SHOW VARIABLES LIKE "%version%";`)
 - The output of `php -i`
+- Any messages in the XDMoD exceptions log `/var/log/xdmod/exceptions.log`
 - A description of the problem you are experiencing
 - Detailed steps to reproduce the problem
 
+If the problem is observed when trying to access the web portal then please also include any
+messages in the web server error log `/var/log/xdmod/apache-error.log`
+
 Mailing List
 ------------