knowledge/library/viewtpl/DisplayJson.php

<?php

include_once SERVER_ROOT . '/library/viewtpl/iDisplay.php';

class DisplayJson implements iDisplay  {
	private $varname;
	private $view;

	public function __construct($varname = ""){
		if($varname !=""){
			$this->varname = strip_tags($varname);
		}
	}

	public function setView($view){
		$this->view = $view;
	}

	public function execute() {
	    // 如果是接口，屏蔽json数据中的公用数据
	    if($this->view['_is_api']) {
	        foreach ($this->view as $k =>$v) {
	            if(substr($k, 0, 1)=='_') unset($this->view[$k]);
	        }
	    }

		$jsonStr = json_encode($this->view);
		if(isset($this->varname) && $this->varname!=""){
			$jsonStr = $this->varname."=".$jsonStr;
		}
		echo $jsonStr;
	}
}