未定义的函数234

Question

  

可能重复：
  “call to undefined function” error when calling class method

我知道这看起来很愚蠢，但我对php有点新意，我被困住了。我试图谷歌这个，但我找不到任何东西。

我在这里调用了未定义的函数错误“$ relatedMovies = getRelatedMovies（$ search）;”我不知道为什么

class Page{

private $currentMovie;//the displaying movie of the page
private $relatedTitle;//related (maybe search) title
private $relatedMovies;//an array of movie titles and images

public function __construct(){
    //other stuff here

    $relatedMovies = getRelatedMovies($search);/******call to undefined function*********/
}


/**
 * returns an array of related movie titles
 */
private function getRelatedMovies($title){
    $relatedMovies = array();

           //do stuff here

    return $relatedMovies.length > 0 ? $relatedMovies : null;
}
}

$page = new Page();