PHP Manual . ... The declare construct is used to set execution directives for a block of code. ... pre ? php // A function that records the time when it is called function profile ($dump = FALSE) { static $ profile ; // Return the times stored in profile , then erase it if ($dump) { $temp = $ profile ; unset ($ profile ); return ($temp); } $ profile [] = microtime (); } // Set up a tick handler register_ tick _function( profile ); // Initialize the function before the declare block ...