JavaScript可以直接调用PHP函数，或是否需要单独的PHP文件来调用该函数？ [英] Can JavaScript call a PHP function directly, or do I need separate php file to call the function?

问题描述

我在做一些基本的Ajax的东西（不是jQuery的..刚学的基础知识），我有一个大致的结构设置，其中HTML调用JavaScript函数，将数据发送到并运行特定的PHP页面。

I am doing some basic Ajax stuff (not jquery.. just learning the basics), and I have a general structure set up where html calls a javascript function which sends data to and runs a specific php page.

但是，如果我只需要运行这已经在functions.php中定义的PHP函数。这是可能的呢？我累了做新的php文件，每个任务的;）

But what if I just need to run a php function that's already defined in functions.php. Is that possible at all? I'm getting tired of making new php files for every task ;)

推荐答案

您可以在PHP中定义一个类来处理这样的东西，如：

You could define a class in php to handle stuff like this, such as:

functions.php:

class MyFunctions {
   function foo() {
      // code here
      // if you need to pass in some parameters, you can do it via jQuery and fetch the data like so (for the jQuery, see below)
      if($_GET['name'] == "john") { } // do stuff
   }

   function bar() {
      // code here
   }

   static function handleFn($fName) {
      if(method_exists(__CLASS__, $fname)) {
         echo $this->{$fname}(); die; // since AJAX, just echo the output and stop executing
      }
   }
}

if(!empty($_GET['f'])) {
   MyFunctions::handleFn($_GET['f']);
}

然后做你的ajax调用像这样（假设jQuery的）：

Then do your ajax call like so (assuming jQuery):

$.get("/functions.php?f=func_name_to_call", {name: "John", hobby: "Programming"}, function(data) {
});

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