使用$ this关键字动态创建和设置PHP对象属性

Question

I'm trying to dynamically create properties of my test case derivative class inside a setUp method, but I'm having a terrible time getting it working.

$folder = dirname(dirname(__FILE__)) . DIRECTORY_SEPARATOR . 'classes';
foreach ( scandir($folder) as $filename ) {
    $path = $folder . DIRECTORY_SEPARATOR . $filename;
    if ( is_file( $path ) ) {
        $nameExtSplit = explode('.', $filename);
        $namePrefixSplit = explode('Hf', $nameExtSplit[0]);
        $propertyName = 'Mock'.$namePrefixSplit[1];
        // $propertyName is getting set correctly—I've checked
        $this->{$propertyName} = $this->makeMock($nameExtSplit[0]);
    }
}

I've tried $this->$propertyName, $this->{$propertyName}, and $this[$propertyName], all to no avail.

I found this question, but he's dynamically setting properties instead of creating and setting them.

How can I dynamically create properties within the object?

EDIT: More details:

This code is inside a class that extends the PHPUnit TestCase class and from which all my test classes are derived. I'm trying to autoload a mock for each one of my classes into protected properties of my custom TestCase class. I'm trying to make it so I don't need to edit my TestCase to have a mock available for a newly created class.

Answer 1

Are you using PHP 5.4 or higher? Try setting the var with something static. If that works, try puting the output of the method in a temporary variable first.