$template = new tpl();
$template->set_template('user_profile.phtml');
$template->write('feed', randomUserFeedFunction());
$template->render();

 
Feed message one 1 
Feed message two 2 
etc.

<?PHP

class template{
	protected $file;
	protected $values = array();
	

	public function __construct(){	}
	
	# Loads and sets template file
	public function set_template($file){
		$this->file = $file;
	}
	# Set 
	public function set($key, $value){
		$this->values[$key] = $value;
	}
	# Output
	public function output(){
		if(!file_exists($this->file)){
			return '<fieldset style="background:#FFF;padding:5px;border:1px solid #CCC;"><legend><strong style="color:red;">ERROR</strong></legend>File ('.$this->file.') doesn\'t exist.</fieldset>';
		}
		$output = file_get_contents($this->file);
		
		foreach($this->values as $key => $value){
			$tagToReplace = "{".$key."}"; # Find {KEY}
			$output = str_replace($tagToReplace, $value, $output);
		}
		return $output;
	}
	# Render Template
	public function render(){
		print $this->output();
	}
}