PHP/MySQL Function Causes Others to Stop Working - php

Question

I have 3 PHP files: an index.php, a config.php w/ MySQL database definitions and a functions.php file with three separate functions. When only one of the functions is called in the index file, things work fine. When I add just one of the other two, however, things stop working.
Using the following example/files, I get this error message where the second function falls in the index.php code:
Error: Fatal error: Call to a member function query() on a non-object in...line 37, which corresponds to the DB query in that second function-- the get_chapter_dollars function.
I'm sure it's something simple, but what am I missing, here? Why is that second function causing problems?
CONFIG.PHP
<?php
define("BASE_URL","/dayofgiving/");
define("ROOT_PATH",$_SERVER["DOCUMENT_ROOT"] . "/dayofgiving/");
// Set variables for the database.
define("DB_HOST", "localhost");
define("DB_NAME", "cdwyer_dspdog");
define("DB_PORT", "1234");
define("DB_USER", "user");
define("DB_PASS", "pass");
FUNCTIONS.PHP
<?php
require_once($_SERVER["DOCUMENT_ROOT"] . "/dayofgiving/inc/config.php");
function get_state_stats() {
require_once(ROOT_PATH . "inc/db.php");
try {
$results = $db->query("
SELECT abb, fullname, dollars, alumnidollars, ugdollars, donors, alumnidonors, ugdonors
FROM dog_states");
$maxDollars = $db->query("
SELECT MAX(dollars)
FROM dog_states;
");
} catch (Exception $e) {
echo "Data coudn’t be found.";
exit;
}
$maxDollars = intval($maxDollars->fetchColumn(0));
$stateInfo=array();
while ($row = $results->fetch(PDO::FETCH_ASSOC)) { // Will return boolean(false) when condition is no longer met.
$stateAbb = $row["abb"];
$thisDollars = $row["dollars"];
$stateInfo[$stateAbb] = $row; // Loops through all states/rows one at a time, and adds all properties to the stateInfo variable w/ abbreviation as key.
$stateInfo[$stateAbb]["opacity"] = ((($thisDollars / $maxDollars)*.5)+.5);
}
return $stateInfo;
}
function get_chapter_dollars() {
require_once(ROOT_PATH . "inc/db.php");
try {
$dollarResults = $db->query("
SELECT abb, fullname, dollars
FROM dog_chapters
ORDER BY dollars DESC
LIMIT 5");
} catch (Exception $e) {
echo "Data coudn’t be found.";
exit;
}
$chapterDollars=array();
while ($row = $dollarResults->fetch(PDO::FETCH_ASSOC)) { // Will return boolean(false) when condition is no longer met.
$chapterDollars[] = $row; // Loops through all (ie, top 5) chapters/rows one at a time, and adds all properties to the chapterDollars variable w/ number as key.
}
return $chapterDollars;
}
function get_chapter_donors() {
require_once(ROOT_PATH . "inc/db.php");
try {
$donorResults = $db->query("
SELECT abb, fullname, donors
FROM dog_chapters
ORDER BY donors DESC
LIMIT 5");
} catch (Exception $e) {
echo "Data coudn’t be found.";
exit;
}
$chapterDonors=array();
while ($row = $donorResults->fetch(PDO::FETCH_ASSOC)) { // Will return boolean(false) when condition is no longer met.
$chapterDonors[] = $row; // Loops through all (ie, top 5) chapters/rows one at a time, and adds all properties to the chapterDollars variable w/ number as key.
}
return $chapterDonors;
}
?>
INDEX.PHP (portion)
<?php require_once($_SERVER["DOCUMENT_ROOT"] . "/dayofgiving/inc/config.php"); ?>
<?php require_once(ROOT_PATH . "db/functions.php"); ?>
<?php $tempStateStats = get_state_stats() ?>
var jsonStates = <?php echo json_encode($tempStateStats); ?>;
<?php $returnChapterDollars = get_chapter_dollars() ?>
<?php echo $returnChapterDollars[0]["abb"];?>

Answer 1

I've had issues with require_once working correctly with my version of PHP (5.3.3). For the purpose of testing try changing it to require or include for each instance on the page and see if it works.