返回整个数组，以获取辅助数组中一个值的最小值

Question

I am sure this question has been asked but i cant find it so here goes...

I have this code (have to use 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++; }

it returns :

[{"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"}]

what i would like to do is find if the lowest listingPrice if the itemCondition is good,very good, fine, or new and return the entire array for that item ex for this it would return

({"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

Establish the conditions you'll accept

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

Filter the array to only include items with those conditions

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

Sort the resulting array in ascending order by listingPrice

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

The lowest price will be your first result.

$result = reset($results);