php 使用 smarty 获取数组中的值计数
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get value count in an array with smarty
提问by Phil
I have an array called $mydatathat looks like this:
我有一个名为的数组$mydata，如下所示：
Array
(
[0] => Array
(
[id] => 1282
[type] =>2
)
[1] => Array
(
[id] => 1281
[type] =>1
)
[2] => Array
(
[id] => 1266
[type] =>2
)
[3] => Array
(
[id] => 1265
[type] =>3
)
)
I've assigned the array to smarty $smarty->assign("results", $mydata)
我已将数组分配给 smarty $smarty->assign("results", $mydata)
Now, in the template, I need to print how much of each "type" there is in the array. Can anyone help me do this?
现在，在模板中，我需要打印数组中每种“类型”的数量。谁能帮我做到这一点？
回答by Matt S
PHP 5.3, 5.4:
PHP 5.3、5.4：
As of Smarty 3 you can do
从 Smarty 3 开始，你可以做到
{count($mydata)}
You can also pipe it in Smarty 2 or 3:
您也可以在 Smarty 2 或 3 中使用管道：
{$mydata|count}
To count up "type" values you'll have to walk through the array in either PHP or Smarty:
要计算“类型”值，您必须在 PHP 或 Smarty 中遍历数组：
{$type_count = array()}
{foreach $mydata as $values}
{$type = $values['type']}
{if $type_count[$type]}
{$type_count[$type] = $type_count[$type] + 1}
{else}
{$type_count[$type] = 1}
{/if}
{/foreach}
Count of type 2: {$type_count[2]}
PHP 5.5+:
PHP 5.5+：
With PHP 5.5+ and Smarty 3 you can use the new array_columnfunction:
使用 PHP 5.5+ 和 Smarty 3，您可以使用新array_column功能：
{$type_count = array_count_values(array_column($mydata, 'type'))}
Count of type 2: {$type_count['2']}
回答by pythonian29033
have you tried this?:
你试过这个吗？：
{$mydata|@count}
where count is passing the php function count()
其中 count 正在传递 php 函数 count()
回答by crmpicco
You can also use:
您还可以使用：
{if $myarray|@count gt 0}...{/if}
