copy folder A and its contents to another folder B

i have a snippet of code that i need some help with.  i want to copy folder A "core" and all its contents to folder B "<customer_name>".

so far my functions just copy files.  it doesnt copy any subfolder files.

/public_html/xxx/cms/core/  <----------------- folder A is core.  core contains 3 txt files and a sub folder called "includes" with 4 txt files .

/<customer_name>/public/xxx/  <-------------------- folder B is <customer_name> - the param i pass into my SetupCustomer function.

basically im copying everything inside core to a folder outside the public_html

see code below:

function CopyCoreFiles($current_directory,$template_directory,$customer_directory)
{
	$dots = array('.', '..');
	$files = array_diff(scandir($template_directory), $dots);
			
	foreach($files as $file) 
	{
		chdir($template_directory);
 
		$myfile = file_get_contents($file);
		
		chdir($current_directory);	
		
		chdir($customer_directory);
		
		file_put_contents($file,$myfile);	
		
		chdir($current_directory);
	}
		
	$files = array_diff(scandir($customer_directory), $dots);
		
	if(count($files) > 0)
	{
		unset($files,$file,$dots,$myfile,$customer_directory,$template_directory,$current_directory);
			
		return 1;
	}
	else
	{
		unset($files,$file,$dots,$myfile,$customer_directory,$template_directory,$current_directory);
			
		return 0;
	}
}
 
function SetupCustomer($customer_name)
{
	$current_directory = '';
		
	if(is_dir($customer_name))
	{			
		$this->DeleteFolderAndFiles($customer_name.'/');
	
		rmdir($customer_name);
	}	
		
	mkdir($customer_name);
		
	$current_directory = getcwd();
		
	if($this->CopyCoreFiles($current_directory,'cms/core/',$customer_name) == 1)
	{	
		unset($current_directory,$customer_name,$handle,$file,$current_directory);
			
		return true;
	}
	else
	{
		unset($current_directory,$customer_name,$handle,$file,$current_directory);
			
		return false;
	}
}
 
SetupCustomer('pegasus');

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