Beginner related questions, PHP simple functions related issues

Rookie problem, PHP simple function problem

PHP Code

  
     Public Function Displaystyle () {   ?>    //What is going on here with the PHP end tag?     
  
   

Ask you master, above this writing how to understand?

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With the name of the function one meaning

Show this code directly in PHP


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is written by PHP in Inside
It's not PHP content, like that style, which is written outside the tag.
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Uh, yes. Start tag for PHP 。 Another is that PHP only starts ------Solution--------------------
Equivalent to the following code:

PHP Code

  Public Function Displaystyle () {  echo "        ";}
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