array_map and pass 2 arguments to the mapped function - array_map(): Argument #3 should be an array

Question

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);  } 

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']         ];     }  } 

When this code runs, I get the error:

array_map(): Argument #3 should be an array

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.

Any ideas?

Answer 1

Please always read docs:

http://php.net/manual/en/function.array-map.php

array array_map ( callable $callback , array $array1 [, array $... ] ) 

and yet you pass bool $format as argument

"How do you pass 2 or more arguments when you call array_map function within a class?

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); }