返回整个数组以获取辅助数组中一个值的最小值

Question

我确定有人问过这个问题，但我找不到，所以这里...

我有这个代码（必须使用 php 5.3）

foreach ($array["Book"] as $abeBooks) {

$abeResult[$i] = array(
            'itemCondition' => $abeBooks['itemCondition'],
            'isbn13' =>$abeBooks['isbn13'],
            'listingPrice' =>$abeBooks['listingPrice'],
            'Link' =>$abeBooks['listingUrl'],
            'sellerRating'=>$abeBooks['sellerRating'],

);

 $isbn13[$i] = $abeBooks["isbn13"];
 $itemCondition[$i] = $abeBooks["itemCondition"];
 $sellerRating[$i] =$abeBooks['sellerRating'];
 $Price[$i] = $abeBooks["listingPrice"];
 $Link[$i] =$abeBooks['listingUrl'];

$i++; }

它返回：

[{"itemCondition":"Fair","isbn13":"9780134167398","listingPrice":"123.5","Link":"www.abebooks.com\/servlet\/BookDetailsPL?bi=22403600014&cm_ven=sws&cm_cat=sws&cm_pla=sws&cm_ite=22403600014","sellerRating":"4"},{"itemCondition":"Very Good","isbn13":"9780134167398","listingPrice":"140.22","Link":"www.abebooks.com\/servlet\/BookDetailsPL?bi=22334428082&cm_ven=sws&cm_cat=sws&cm_pla=sws&cm_ite=22334428082","sellerRating":"4"},{"itemCondition":null,"isbn13":"9780134167398","listingPrice":"480.7","Link":"www.abebooks.com\/servlet\/BookDetailsPL?bi=22173609508&cm_ven=sws&cm_cat=sws&cm_pla=sws&cm_ite=22173609508","sellerRating":"4"}]

如果 itemCondition 是好的、非常好的、好的或新的，我想做的是找到最低的 listingPrice 并返回该项目的整个数组，例如它会返回

({"itemCondition":"Fair","isbn13":"9780134167398","listingPrice":"123.5","Link":"www.abebooks.com\/servlet\/BookDetailsPL?bi=22403600014&cm_ven=sws&cm_cat=sws&cm_pla=sws&cm_ite=22403600014","sellerRating":"4"})

Answer 1

制定您将接受的条件

$conditions = array('Fair', 'Very Good', 'Fair', 'New');

过滤数组以仅包含具有这些条件的项目

$results = array_filter($abeResult, function($book) use ($conditions) {
    return in_array($book['itemCondition'], $conditions);
});

按listingPrice升序对结果数组进行排序

usort($results, function($a, $b) {
    if ($a['listingPrice'] < $b['listingPrice']) return -1;
    if ($a['listingPrice'] > $b['listingPrice']) return 1;
    return 0;
});

最低价格将是您的第一个结果。

$result = reset($results);