Listing 1. Sammple Library Coding
common.php:
<?php
//connect to postgres database
$conn=pg_pconnect("user=tim dbname=db_example");
//see if our connection was successful
if (!$conn) {
//connection failed-exit the page with an
//error
//you could also try to proceed without the
//database-it's up to you
echo pg_errormessage($conn);
exit;
}
//now let's set up a common site header
function site_header ($title) {
return '<HTML>
<HEAD>
<TITLE>'.$title.'</TITLE>
</HEAD>
<BODY>';
}
//common HTML to be output at the end of the page
function site_footer () {
return '</BODY></HTML>';
}
//a simple wrapper to reduce the code needed
//for each postgres query
function query($sql) {
global $conn;
return pg_exec($conn,$sql);
}
//have PHP4 set up/restore your session state
//automatically on every page
session_start();
?>
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