4343l1.text Listing 1. Sammple Library Coding common.php: '.$title.' '; } //common HTML to be output at the end of the page function site_footer () { return ''; } //a simple wrapper to reduce the code needed //for each postgres query function query($sql) { global $conn; return pg_exec($conn,$sql); } //have PHP4 set up/restore your session state automatically //on every page session_start(); ?>