Is there a problem with array_map-php using too much reference?

{Code ...} recently, too many array_map functions are used to process data in place of foreach, and writing too many references using anonymous functions and references (& amp;) will this cause php performance problems?

array_map(function($item) use(&$i, &$tmpVar) {                $i++;                $tmpVar['t'.$i] = $item;            }, $ct_info);            

In the recent project, too many array_map replace foreach to process data, and anonymous functions and references are used (&)
Write too muchReferenceWill it cause php performance problems?

Reply content:

array_map(function($item) use(&$i, &$tmpVar) {                $i++;                $tmpVar['t'.$i] = $item;            }, $ct_info);            

In the recent project, too many array_map replace foreach to process data, and anonymous functions and references are used (&)
Write too muchReferenceWill it cause php performance problems?

It will not affect you. We recommend that you take a look at "deep understanding of the PHP kernel". In the interpreterzvalStruct stores the information of the variable. The reference of the variable is that the symbol table points to the samezvalOnly one record.

Http://www.php-internals.com/book? P = chapt03/03-01-00-variables-structure

Using references will not cause performance problems, but misuse of references when you are not familiar with references may easily cause some strange errors, and these errors are generally difficult to troubleshoot.

Let me add some clear answers:

However, misuse of references may cause some strange errors when you are not familiar with references, and these errors are generally difficult to troubleshoot.

For example:

   $v){        $v = &$arr[$k];    }    var_dump($arr);?>

@ SyuTingSong
The PHP kernel saves variables on the one hand.
In addition, when PHP is running as a web program, it will always release variable references and so on at the end of the request. Therefore, a few more references are irrelevant.

Thank you for your failure to fully adopt it.