函数不会在内部运行两次 - if else - 语句

Question

我想做一个条形码查找。

第一次尝试时，会在用户条形码上本地查找条形码。

如果 是重复的，则该函数返回第一个实例，并带有文本“在本地找到”

如果在本地找不到条形码，则应进行全局搜索。

当在本地找不到条形码时，我遇到的问题是 if else 语句。

如果在本地找不到它，它应该检查是否在全局范围内找到它。

public function updatePricelist(Request $request)

    {

        $user_id = Auth::user()->id;

        $counter = count($_POST["product_name"]);

        //product barcode

        for ($x = 0; $x < $counter; $x++) {

            $product_barcode[] = $_POST["product_barcode"][$x];

        }

        //check the barcode locally

        $result = $this->barcodeLookUp($product_barcode, 'local');

        if (!empty($result)) {

           $result =  "found locally";

        }

        else {

            $result = $this->barcodeLookUp($product_barcode, 'global');

            if (!empty($result)) {

                $result =  "found globally";

            }

        }

        return $result;

    }

    public function barcodeLookUp($product_barcode, $type)

    {

        $user_id = Auth::user()->id;

if ($type === 'local') {

            $db_barcodes = $this->getBarcodes($user_id, 'local');

        }

        if ($type === 'global') {

            $db_barcodes = $this->getBarcodes($user_id, 'global');

        }

        //merge arrays

        $merge_array = array_merge($db_barcodes, $product_barcode);

        function array_dup($ar)

        {

            return array_unique(array_diff_assoc($ar, array_unique($ar)));

        }

        $result = array_dup($merge_array);

        return current($result);

    }

    public function getBarcodes($user_id, $type)

    {

        if ($type === 'local') {

            $result = DB::select('SELECT products FROM vendor_pricelist WHERE user_id = ?', [$user_id]);

        }

        if ($type === 'global') {

            $result = DB::select('SELECT products FROM vendor_pricelist WHERE user_id != ?', [$user_id]);

        }

        $count_results = count($result);

        $temp = [];

        $temp_2 = [];

        for ($x = 0; $x < $count_results; $x++) {

            array_push($temp, json_decode($result[$x]->products));

        }

Answer 1

这可能有帮助：&nbsp; &nbsp; //check the barcode locally&nbsp; &nbsp; $result = $this->barcodeLookUp($product_barcode, 'local');&nbsp; &nbsp; if (empty($result)) {&nbsp; &nbsp; &nbsp; &nbsp; $result = $this->barcodeLookUp($product_barcode, 'global');&nbsp; &nbsp; &nbsp; &nbsp; if (!empty($result)) {&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; return [&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; "message" => "found globally",&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; "result"&nbsp; => $result,&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; ];&nbsp; &nbsp; &nbsp; &nbsp; }&nbsp; &nbsp; &nbsp; &nbsp; return [&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; "message" => "not found",&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; "result"&nbsp; => null,&nbsp; &nbsp; &nbsp; &nbsp; ];&nbsp; &nbsp; } else {&nbsp; &nbsp; &nbsp; &nbsp; return [&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; "message" => "found locally",&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; "result"&nbsp; => $result,&nbsp; &nbsp; &nbsp; &nbsp; ];&nbsp; &nbsp; }