如何使这些字段从数据库自动填充？ [英] How do I make these fields autopopulate from the database?

问题描述

  $ items_pool = Array（
 [0]）我有一个数组，它包含这样的值： =>数组（[id] => 2 [数量] => 1）
 [2] => Array（[id] => 72 [quantity] => 6）
 [3] => Array ）
 [4] => Array（[id] => 5 [quantity] => 1）
 [5] => Array（[id] => 7 [quantity] = 1）
 [7] =>数组（[id] => 1）
 [6] =>数组（[id] => 8 [quantity] => 9 [quantity] => 1）
 [8] => Array（[id] => 19 [quantity] => 1）
 [9] =& ] => 20 [数量] => 1）
 [10] =>数组（[id] => 22 [数量] => 1） Array（[id] => 29 [quantity] => 0）
）
  

接下来，我有一个表单，我试图填充。它循环遍历项目数据库，打印出所有可能的项目，并检查已经存在于$ items_pool中的项目。

  <？php foreach（$ items ['items_poolpackage']  - > result（）as $ item）：？> 
 
< input type =checkboxname =measure [<？= $ item-> id？>] [checkmark]value =<？= $ item-> ; ID>> 
 
<？php endforeach; ？> 
  

我知道我在这里想要完成什么逻辑，但我无法弄清楚编程。

我在找的东西，写得松散的是这样的（不是真正的代码）：

< input type =checkboxname =measure [<？= $ item-> id？>] [checkmark]value =<？= $ item-> id ？>中<？php if（$ items_pool ['$ item-> id']）{echoSELECTED;特别是通过数组通过数组，通过所有的键值（ID）和if
$ b

<？php if（$ items_pool ['$ item-> id']）{回声SELECTED; } else {}？>

我从这样的循环中了解到，它可能意味着很多'额外'处理。 / p>

TL; DR - 我需要在数组中循环，检查键'id'，然后打印一个字符串。

解决方案

如果我理解正确，你需要类似这样的东西？

  array_walk（$ items_pool，create_function（'$ array'，'global $ item; if（in_array（$ item-> id，$ array））{echochecked = \checked \ ;}'））; 
  

考虑到这一点，如果您将产品存储在一维数组中（假定id始终是独特的

  $ items_pool = array（id，quantity）
  

您不会因重复输入产品而导致数量增加/减少。

  $ items_pool [id] ++; / *或* / $ items_pool [id] = $ items_pool [id] + 2; 
  

如果id存在于数组中，那么这两种技术都应该能够工作。

如果你可以在这个数组中存储除数量以外的其他attritubes，你可以

  $ items_pool = array（id => array （数量=> 3，颜色=>红色））; 
 $ items_pool [id] [quantity]  - ; 
  

I have an array, which holds values like this:

$items_pool = Array ( 
[0] => Array ( [id] => 1 [quantity] => 1 ) 
[1] => Array ( [id] => 2 [quantity] => 1 ) 
[2] => Array ( [id] => 72 [quantity] => 6 ) 
[3] => Array ( [id] => 4 [quantity] => 1 )
[4] => Array ( [id] => 5 [quantity] => 1 ) 
[5] => Array ( [id] => 7 [quantity] => 1 ) 
[6] => Array ( [id] => 8 [quantity] => 1 ) 
[7] => Array ( [id] => 9 [quantity] => 1 ) 
[8] => Array ( [id] => 19 [quantity] => 1 ) 
[9] => Array ( [id] => 20 [quantity] => 1 ) 
[10] => Array ( [id] => 22 [quantity] => 1 ) 
[11] => Array ( [id] => 29 [quantity] => 0 ) 
) 

Next, I have a form that I am trying to populate. It loops through the item database, prints out all the possible items, and checks the ones that are already present in $items_pool.

<?php foreach ($items['items_poolpackage']->result() as $item): ?>

<input type="checkbox" name="measure[<?=$item->id?>][checkmark]" value="<?=$item->id?>"> 

<?php endforeach; ?>

I know what logically I'm trying to accomplish here, but I can't figure out the programming.

What I'm looking for, written loosely is something like this (not real code):

<input type="checkbox" name="measure[<?=$item->id?>][checkmark]" value="<?=$item->id?>" <?php if ($items_pool['$item->id']) { echo "SELECTED"; } else { }?>>

Specifically this conditional loop through the array, through all the key values (the ID) and if there's a match, the checkbox is selected.

<?php if ($items_pool['$item->id']) { echo "SELECTED"; } else { }?>

I understand from a loop structured like this that it may mean a lot of 'extra' processing.

TL;DR - I need to loop within the array, check for the key 'id', then print a string.

解决方案

If I understand correctly, you need something like this?

array_walk($items_pool, create_function('$array', 'global $item; if( in_array($item->id, $array) ) { echo "checked=\"checked\""; }'));

Conside this though, if you stored your products in a single dimensional array (presuming the ids will always be unique

$items_pool = array(id, quantity)

You will not end up with having duplicated entries of products and can incremement/decrement the quantity easier.

$items_pool[id]++; /* or */ $items_pool[id] = $items_pool[id] + 2;

Both techniques should work if the id exists in the array or not.

If you are hoping to store other attritubes in this array other than quantity, you can

$items_pool = array(id=>array(quantity=>3, colour=>"red"));    
$items_pool[id][quantity]--;

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