uniq多维数组

Question

I need to merge following two arrays into a single array.

It looks like array_merge not support multiple dimensional array.

Courses

Array ( 
[0] => Array ( [Name] => Course1 [CourseId] => 1 [Selected] => ) 
[1] => Array ( [Name] => Course2 [CourseId] => 2 [Selected] => ) 
[2] => Array ( [Name] => Course3 [CourseId] => 3 [Selected] => ) 
[3] => Array ( [Name] => Course4 [CourseId] => 4 [Selected] => ) 
[4] => Array ( [Name] => Course5 [CourseId] => 5 [Selected] => )
) 

TeacherCourses

Array ( 
[0] => Array ( [CourseId] => 1 [Selected] => selected) 
[1] => Array ( [CourseId] => 2 [Selected] => selected) 
[2] => Array ( [CourseId] => 3 [Selected] => selected) 
) 

I need this result

Array ( 
[0] => Array ( [Name] => Course1 [CourseId] => 1 [Selected] => selected) 
[1] => Array ( [Name] => Course2 [CourseId] => 2 [Selected] => selected) 
[2] => Array ( [Name] => Course3 [CourseId] => 3 [Selected] => selected) 
[3] => Array ( [Name] => Course4 [CourseId] => 4 [Selected] => ) 
[4] => Array ( [Name] => Course5 [CourseId] => 5 [Selected] => )
) 

Answer 1

Have you tried foreach loop?

Here we go,:

foreach($arr1 as $key => $value){
    foreach($arr2 as $value2){
        if($value['CourseId'] === $value2['CourseId']){
            $arr1[$key]['Selected'] = $value2['Selected'];
        }               
    }
}

hope this would help you.

keep coding :)