Call to undefined function problem

I'm doing the following: ---- test.php ----- <?php require("functions.php"); require("...."); // several other requires here setNoCacheHeaders(); // this is line 16 // other stuff here ?> ------ functions.php ----- <?php if (!define("__FUNCTIONS__") ) { define( "__FUNCTIONS__", 1, 1 ); // a bunch of other defines here echo "here 1<br>"; function setNoCacheHeaders( ) { static $headersNotSet = TRUE; if ( $headersNotSet ) { header("Expires: Mon, 26 Jul 1997 05:00:00 GMT"); // Date in the past header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT"); // always modified header("Cache-Control: no-cache, must-revalidate"); // HTTP/1.1 header("Pragma: no-cache"); // HTTP/1.0 $headersNotSet = FALSE; } } echo "here 2<br>"; // a few more functions here } -------------------------------- My output is here 1 here 2 Fatal error: Call to undefined function: setnocacheheaders() in $DOCUMENT_ROOT/test.php on line 16 Can someone explain? I found something similar in the archives but no answer was given. This exact code worked under php3. The only changes in the files were files ending in php3 were changed to end php. I also had 2 classes that I was using that had initializers in the variable declaration. I moved the initialization to constructors. Note that on some clients the request goes through w/o errors. This is intermittent but consistent on a per client basis. - doug