Questions about the append status of php closures

Directly go to the Code: {code...} theory should be printed: Simon, youareacolman! But the actual print is empty! What is the problem? Phpversion: 5.5.29:

Theory should be printed: Simon, you are a cool man!

But the actual print is empty!

What is the problem?

Php version: 5.5.29

Reply content:

Directly run the Code:

Theory should be printed: Simon, you are a cool man!

But the actual print is empty!

What is the problem?

Php version: 5.5.29

Because your syntax is incorrect
Return is missing;

return function($doCommand) use ($name) {                return sprintf('%s, %s', $name, $doCommand);        };

Dizzy, is LZ written on the web page? A blank space is obviously an error. And fatal errors. You can see the error log.

The following error is displayed:

PHP Parse error:  syntax error, unexpected '}' in - on line 6