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@ 2017-12-19T20:15:37Z

<?php

$product_breakdown = array(
    'storage'=>array(
        '10001'=>array(
            'total_stock'=>29,
            'breakdown'=>array(
                '4'=>5, '1'=>5, '2'=>1, '10'=>8, '9'=>10
            )
        )
    )
);
    $orderqt = 25;
    if($orderqt <= $product_breakdown['storage']['10001']['total_stock']){
        foreach($product_breakdown['storage']['10001']['breakdown'] as $key => &$breakdown){
            if($orderqt>0){
                $possibleWarehouses = array_filter(
                    $product_breakdown['storage']['10001']['breakdown'],
                    function ($value) use($orderqt) {
                        return ($value >= $orderqt);
                    }
                );
                
                if(count($possibleWarehouses) != 0){
                    $house = key($possibleWarehouses);
                    $order[$house] = $orderqt;
                    $product_breakdown['storage']['10001']['breakdown'][$house] -= $orderqt;
                    $orderqt = 0;
                }elseif($orderqt >= $breakdown){
                    $orderqt -= $breakdown;
                    $order[$key] = $breakdown;
                    $breakdown = 0;
                }else{
                    $order[$key] = $orderqt;
                    $orderqt = 0;
                    $breakdown -= $orderqt;
                }
            }else{
                break;
            }
        }
    }else{
        echo "not enough";
    }
    var_dump($order,$product_breakdown);

Output for 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6: array(5) { [4]=> int(5) [1]=> int(5) [2]=> int(1) [10]=> int(8) [9]=> int(6) } array(1) { ["storage"]=> array(1) { [10001]=> array(2) { ["total_stock"]=> int(29) ["breakdown"]=> array(5) { [4]=> int(0) [1]=> int(0) [2]=> int(0) [10]=> int(0) [9]=> &int(4) } } } }
Output for 8.3.5: Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 array(5) { [4]=> int(5) [1]=> int(5) [2]=> int(1) [10]=> int(8) [9]=> int(6) } array(1) { ["storage"]=> array(1) { [10001]=> array(2) { ["total_stock"]=> int(29) ["breakdown"]=> array(5) { [4]=> int(0) [1]=> int(0) [2]=> int(0) [10]=> int(0) [9]=> &int(4) } } } }

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