Smarty foreach result grouped and concatenate-CodePudding

I have a multidimensional array and would like to generate a definition list grouped by name and values concatenated comma separated.

Through the smarty foreach loop, I manage to generate a definition list but was unable to group by the name nor concatenate the respective values.

The array looks like this:

Array ( 
    [0] => Array ( 
        [name] => Fabric 
        [value] => Silk 
    ) 
    [1] => Array ( 
        [name] => Paper 
        [value] => A4 
    ) 
    [2] => Array ( 
        [name] => Paper 
        [value] => A5 
    ) 
)

The smarty foreach loop:

<dl>
    {foreach from=$products item=feature}
        <dt>{$feature.name}</dt>
        <dd>{$feature.value}</dd>
    {/foreach}
</dl>

So far I just managed to get a definition list like this:

<dl>
    <dt>Fabric</dt>
    <dd>Silk</dd>
    <dt>Paper</dt>
    <dd>A4</dd>
    <dt>Paper</dt>
    <dd>A5</dd>
</dl>

This is how I need to get it:

<dl>
    <dt>Fabric</dt>
    <dd>Silk</dd>
    <dt>Paper</dt>
    <dd>A4, A5</dd>
</dl>

Any help would be greatly appreciated.

I forgot to mention that I can't change the array. I have to solve this in the .tpl file.

CodePudding user response：

To do it at the template level you can create an array using the following syntax to group the products by name:

{foreach from=$products item=feature}
    {$grouped[$feature.name][] = $feature.value}
{/foreach}

Then in your foreach add a reference to the key which is the product name and implode the values:

<dl>
    {foreach from=$grouped key=$key item=features}
        <dt>{$key}</dt>
        <dd>{", "|implode:$features}</dd>
     {/foreach}
</dl>

CodePudding user response：

// Setup:
$products = 
[
    ['name' => 'Fabric', 'value' => 'Silk'],
    ['name' => 'Paper', 'value' => 'A4'],
    ['name' => 'Paper', 'value' => 'A5'],
];

First lets group your products by name with function:

function groupByKeys($array) 
{
    $result = [];
    
    foreach($array as $key => $value) {
        if(!array_key_exists($value['name'], $result)) {
            $result[$value['name']] = [];
        }
        
        $result[$value['name']][] = $value['value'];
    }
    
    return $result;
}


$groupedproducts = groupByKeys($products);

Then just show them in template, values comma separated:

<dl>
    {foreach from=$groupedproducts key=k item=v}
        <dt>{$k}</dt>
        <dd>{', '|implode:$v}</dd>
    {/foreach}
</dl>