本地html获取服务端php数据

===================本地html=============================

<script type="text/javascript" src="http://服务器/文件名.php?可加传递参数"></script>  


<script type="text/javascript" >  
	alert(jsdata);  
</script> 

===================服务器php============================

$php_test="I come from PHP!";  
echo "var jstext="$php_test";";   

经测试，运行本地html会弹出对话框，提示内容为：I come from PHP!