我编写了PHP脚本来自动更新数据库中提供者API的商品。不幸的是，通过在foreach循环中执行以下查询（在API记录之后），负载占CPU的99％。该脚本必须每10-15分钟在cron中激活一次，但是在此负载下服务器很弱。我如何优化它以提高工作效率？
<?php
include "config.php";
function checkDevice($device) {
if($device == "Android" || $device == "iOS" || $device == "iPhone" || $device == "iPad") {
return true;
} else {
return false;
}
}
function countUserPayout($providerPayout) {
$summary = ($providerPayout * 100) / 2;
return ceil($summary);
}
function getOgAds() {
$response = file_get_contents("link");
$result = json_decode($response, true);
return $result["offers"];
}
function getAdGate() {
$response = file_get_contents("link");
$result = json_decode($response, true);
return $result["data"];
}
function checkOgAdsDevice($devices) {
$devicesArray = explode(",", $devices);
foreach($devicesArray as $device) {
if($device == "iPhone" || $device == "iPad" || $device == "Android") {
return true;
} else {
return false;
}
}
}
function detectDesktop($category) {
$categories = explode(",", $category);
$exists = array_search("Desktop", $categories);
if($exists) {
return true;
} else {
return false;
}
}
function createCountries($object) {
foreach($object as $country) {
$countries[] = $country;
}
if(isset($countries)) {
return $countries;
}
}
function createOfferWall() {
$offerWall = [];
foreach(getOgAds() as $offer) {
if(checkOgAdsDevice($offer["device"]) && detectDesktop($offer["device"]) == false) {
$offerWall[] = array(
"offer_id" => $offer["offerid"],
"name" => $offer["name_short"],
"requirements" => $offer["adcopy"],
"category" => $offer["device"],
"provider_payout" => $offer["payout"],
"payout" => countUserPayout($offer["payout"]),
"epc" => $offer["epc"],
"icon" => $offer["picture"],
"anchor" => $offer["link"],
"countries" => (array)$offer["country"],
"provider" => "ogads"
);
} else {
continue;
}
}
foreach(getAdGate() as $offer) {
if(checkDevice($offer["categories"][0])) {
$offerWall[] = array(
"offer_id" => $offer["id"],
"name" => $offer["adgate_rewards"]["anchor"],
"requirements" => $offer["requirements"],
"category" => $offer["categories"][0],
"provider_payout" => $offer["payout"],
"payout" => countUserPayout($offer["payout"]),
"epc" => $offer["epc"],
"icon" => $offer["creatives"]["icon"],
"anchor" => $offer["click_url"],
"countries" => createCountries($offer["countries"]),
"provider" => "adgate"
);
} else {
continue;
}
}
return $offerWall;
}
function createIdWall($dbh) {
$offerWall = createOfferWall();
foreach($offerWall as $offer) {
$idWall[$offer["offer_id"]] = $offer["offer_id"];
}
return $idWall;
}
function setCountries($dbh, $countries, $offer) {
if(isset($countries)) {
foreach($countries as $country) {
$stmt = $dbh->prepare("INSERT INTO `table`(`aaa`,`xxx`,`yyy`) VALUES(NULL, :country, :oid)");
$stmt->bindParam(":country", $country, PDO::PARAM_STR);
$stmt->bindParam(":oid", $offer, PDO::PARAM_INT);
$stmt->execute();
}
}
}
function checkOfferExists($dbh, $providerId) {
$stmt = $dbh->prepare("SELECT count(`id`) as `exists` FROM `table` WHERE `provider_id` = :providerId");
$stmt->bindParam(":providerId", $providerId, PDO::PARAM_STR);
$stmt->execute();
$result = $stmt->fetch(PDO::FETCH_ASSOC);
if($result["exists"] == 1) {
return true;
} else {
return false;
}
}
function getOfferInfo($dbh, $providerId) {
$stmt = $dbh->prepare("SELECT * FROM `table` WHERE `provider_id` = :providerId");
$stmt->bindParam(":providerId", $providerId, PDO::PARAM_STR);
$stmt->execute();
$result = $stmt->fetch(PDO::FETCH_ASSOC);
return $result;
}
function compareOffers($dbh, $providerId, $offer) {
$dbOffer = getOfferInfo($dbh, $providerId);
if($dbOffer["provider_payout"] != $offer["provider_payout"] || $dbOffer["anchor"] != $offer["anchor"] || $dbOffer["offer_name"] != $offer["name"] || $dbOffer["category"] != $offer["category"] || $dbOffer["icon"] != $offer["icon"] || $dbOffer["requirements"] != $offer["requirements"]) {
return true;
} else {
return false;
}
}
function getDbOffers($dbh) {
$stmt = $dbh->prepare("SELECT `provider_id` FROM `table`");
$stmt->execute();
$result = $stmt->fetchAll(PDO::FETCH_ASSOC);
return $result;
}
function activateOffer($dbh, $providerId) {
$stmt = $dbh->prepare("UPDATE `table` SET `active` = 1 WHERE `provider_id` = :providerId");
$stmt->bindParam(":providerId", $providerId, PDO::PARAM_INT);
$stmt->execute();
}
function disableOffer($dbh, $providerId) {
$stmt = $dbh->prepare("UPDATE `table` SET `active` = 0 WHERE `provider_id` = :providerId");
$stmt->bindParam(":providerId", $providerId, PDO::PARAM_INT);
$stmt->execute();
}
function updateOffer($dbh, $providerId, $offer) {
$stmt = $dbh->prepare("UPDATE `table` SET
`aaa` = :payout,
`bbb = :points,
`ccc` = :anchor,
`ddd` = :name,
`eee` = :category,
`fff` = :icon,
`ggg` = :requirements
WHERE `provider_id` = :providerId");
$stmt->bindParam(":providerId", $providerId, PDO::PARAM_STR);
$stmt->bindParam(":payout", $offer["provider_payout"], PDO::PARAM_INT);
$stmt->bindParam(":points", $offer["payout"], PDO::PARAM_INT);
$stmt->bindParam(":anchor", $offer["anchor"], PDO::PARAM_STR);
$stmt->bindParam(":name", $offer["name"], PDO::PARAM_STR);
$stmt->bindParam(":category", $offer["category"], PDO::PARAM_STR);
$stmt->bindParam(":icon", $offer["icon"], PDO::PARAM_STR);
$stmt->bindParam(":requirements", $offer["requirements"], PDO::PARAM_STR);
$stmt->execute();
}
function addOffer($dbh, $offer) {
$stmt = $dbh->prepare("INSERT INTO `table` (`aaa`, `bbb`, `ccc, `ddd`, `eee`, `fff`, `ggg`, `hhh`, `jjj`, `kkk`, `lll`, `zzz`, `xxx`) VALUES (NULL, :requirements, :points, :providerId, :icon, :epc, :ownPayout, :anchor, :category, :name, 1, 0, :provider);");
$stmt->bindParam(":requirements", $offer["requirements"], PDO::PARAM_STR);
$stmt->bindParam(":points", $offer["payout"], PDO::PARAM_INT);
$stmt->bindParam(":providerId", $offer["offer_id"], PDO::PARAM_INT);
$stmt->bindParam(":icon", $offer["icon"], PDO::PARAM_STR);
$stmt->bindParam(":epc", $offer["epc"], PDO::PARAM_STR);
$stmt->bindParam(":ownPayout", $offer["provider_payout"], PDO::PARAM_STR);
$stmt->bindParam(":anchor", $offer["anchor"], PDO::PARAM_STR);
$stmt->bindParam(":category", $offer["category"], PDO::PARAM_STR);
$stmt->bindParam(":name", $offer["name"], PDO::PARAM_STR);
$stmt->bindParam(":provider", $offer["provider"], PDO::PARAM_STR);
$stmt->execute();
setCountries($dbh, $offer["countries"], $offer["offer_id"]);
}
function checkStatus($dbh, $providerId) {
$stmt = $dbh->prepare("SELECT `active` FROM `table` WHERE `provider_id` = :providerId");
$stmt->bindParam(":providerId", $providerId, PDO::PARAM_INT);
$stmt->execute();
$result = $stmt->fetch(PDO::FETCH_ASSOC);
if($result["active"] == 0) {
return false;
} else {
return true;
}
}
function followOffers($dbh) {
foreach(createOfferWall() as $offer) {
if(checkOfferExists($dbh, $offer["offer_id"])) {
if(compareOffers($dbh, $offer["offer_id"], $offer)) {
updateOffer($dbh, $offer["offer_id"], $offer);
} else {
continue;
}
} else {
addOffer($dbh, $offer);
}
}
}
function findRevokeOffers($dbh) {
$idWall = array_flip(createIdWall($dbh));
foreach(getDbOffers($dbh) as $dbOffer) {
$providerId = $dbOffer["provider_id"];
if(isset($idWall[$providerId])) {
continue;
} else {
if(checkStatus($dbh, $providerId)) {
disableOffer($dbh, $providerId);
} else {
continue;
}
}
}
}
function getCurrentTime() {
$currentTime = date('Y-m-d H:i:s');
return $currentTime;
}
echo "// START [".getCurrentTime()."]" .PHP_EOL;
followOffers($dbh);
findRevokeOffers($dbh);
echo "// END" .PHP_EOL;
?>