array_map 并将 2 个参数传递给映射函数 - array_map():参数 #3 应该是一个数组
我有一个如下所示的抽象类:
I have an abstract class that looks like this:
abstract class Transformer {
/**
* Transform a collection of items
*
* @param array $items
* @param bool $format
* @return array
*/
public function transformCollection(array $items, $format)
{
return array_map([$this, 'transform'], $items, $format);
}
/**
* Transform a item
*
* @param array $item
* @param bool $format
* @return mixed
*/
public abstract function transform(array $item, $format);
}
然后我有以下实现它的类:
Then I have the following class that implements it:
class ServiceLogTransformer extends Transformer {
public function transform(array $service_log, $format = false)
{
return [
'id' => $service_log['id'],
'date' => $service_log['log_date'],
'time' => $service_log['log_time'],
'type' => ($format ? status_label($service_log['log_type']) : $service_log['log_type']),
'entry' => $service_log['log_entry']
];
}
}
当这段代码运行时，我得到了错误:
When this code runs, I get the error:
在类中调用 array_map 函数时，如何传递 2 个或多个参数?我检查了 PHP 文档，看起来这是允许的，但它不适用于我的 Larave 4.2 项目.
How do you pass 2 or more arguments when you call array_map function within a class? I checked the PHP Documentation and it looks like this is allowed, but it isn't working on my Larave 4.2 project.
有什么想法吗?
推荐答案
请务必阅读文档:
http://php.net/manual/en/function.array-地图.php
array array_map ( callable $callback , array $array1 [, array $... ] )
但你将 bool $format 作为参数传递
and yet you pass bool $format as argument
"调用array_map函数时如何传递2个或更多参数在一个班级里?
"How do you pass 2 or more arguments when you call array_map function within a class?
我会用 use() 语法创建匿名函数
I would create anonymous function with use() syntax
public function transformCollection(array $items, $format)
{
return array_map(function($item) use ($format) {
return $this->transform($item, $format);
}, $items);
}
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