php中的变量范围

Question

Why can I define a new instance of class AdRequest inside function like this:

require_once 'adRequest.php';
class adRequestTest extends PHPUnit_Framework_TestCase{

  public $fixture;

  function testGetHash_returnsCorrectValue(){
    $fixture = new AdRequest();
    $fixture->site = "dummy.com";
  }
}

but when I am trying to create this instance like this:

require_once 'adRequest.php';

class adRequestTest extends PHPUnit_Framework_TestCase{

  public $fixture;
  $fixture = new AdRequest();

  function testGetHash_returnsCorrectValue(){
    $fixture->site = "dummy.com";
  }
}

I got this error:

PHP Parse error: syntax error, unexpected '$fixture' (T_VARIABLE), expecting function (T_FUNCTION)

Answer 1

If you want to create the instance once and use it in every function , use setUp() , setUp() is called before each testXxx() method

<?php

require_once 'adRequest.php';
class adRequestTest extends PHPUnit_Framework_TestCase{

 public $fixture;

 public function setUp() {

    $this->fixture = new AdRequest();
 }

 function testGetHash_returnsCorrectValue(){

    $this->fixture->site = "dummy.com";
 }