Question

我正在向PO模块开发票。所以，让我们说发票里面有3种产品，

Product a => Vendor A 
Product b => Vendor B
Product c => Vendor A

我有一个从angularJS传递给PHP的数组。

数组被称为

 products

以下代码位于我的PHP页面

中

$products = isset($post_data['products']) ? $post_data['products']:array();

if(count($products) > 0){
    foreach($products as $v){
         //following code is working, but it will create 3 new PO with 
         //the respective products. So if let's say there are 3 products, with 2 items with same vendor, and 1 with another vendor, 
         //it will insert 3 new PO. What I wanted is to create 1 PO with 2 items(same vendor), 1 another PO with different vendor
         $param = array(
            //po data to insert
         );
         $this->_model->add($param);
         $insert_id = $this->db->insert_id();

         $products_array = array(
           //purchased product
         );
         $this->generic_model->add($products_array);        
    }
}

这是来自数组的var_dump结果，该结果传递给PHP页面（来自var_dump（$ v））

  array (size=3)
        'id' => string '35'
        'vendor' => string 'Vendor 1' 
        'vendor_id' => string '5' 
    array (size=3)
        'id' => string '33' 
        'vendor' => string 'Vendor 2 ' 
        'vendor_id' => string '7' 
    array (size=3)
        'id' => string '34'
        'vendor' => string 'Vendor 2 ' 
        'vendor_id' => string '7'

从var_dump结果可以看出，有2个相同的供应商，即供应商2。

所以我的问题是，如何在我的PHP中从angularJS循环数组，然后基于同一个供应商“分组”它？因此，通过前面的示例，我如何使用以下数据将数据插入到我的数据库中

2 tables in my db, purchase_order and purchased_product
New PO with 2 items inside from Vendor 2, (1 purchase order row with 2 rows in purchased_product)
Another new PO with 1 item from Vendor 1, (1 purchase order row with 1 row in purchased_product)

已经处理了很长一段时间，仍然无法弄清楚如何进行数组循环..

谢谢.. :)

Answer 1

您的代码示例没有说明从哪里获得PO 1和PO 2密钥，因此我无法将其包含在解决方案中。请随时更新您的问题以澄清这一点。

如上所述采用JSON结构并将其转换为＆＃34;数组＆＃34;如果指定了字符串值，您可以尝试以下操作：

<?php

// firstly, just some boilerplate for this example

$json = <<<JSON
[
    {
       "id": "35",
       "vendor": "Vendor 1",
       "vendor_id": "5"
    },
    {
       "id": "33",
       "vendor": "Vendor 2",
       "vendor_id": "7"
    },
    {
       "id": "34",
       "vendor": "Vendor 2",
       "vendor_id": "7"
    }
]
JSON;

$data = json_decode($json, true); 

// now we can start extracting and grouping data

// assuming you are using >= 5.5 here
// `array_column()` extracts the values of all 
// sub-arrays with the `vendor` key into an array
$vendors = array_column($data, 'vendor');

// `array_count_values()` aggregates a count
// for each instance of each string in the array
// with the vendor as the key and a count as its corresponding value
$vendorCounts = array_count_values($vendors);

// map over the keys and values, creating an array
// of strings in the specified format
$vendorGroups = array_map(function ($vendor, $count) {
    return sprintf('%d items from %s', $count, $vendor);
}, array_keys($vendorCounts), $vendorCounts);

print_r($vendorGroups);

这会产生：

Array
(
    [0] => 1 items from Vendor 1
    [1] => 2 items from Vendor 2
)

文档参考：

希望这会有所帮助：）

从索引的PHP数组中检索相同的值

1 个答案: